CN201004343Y - Power lead for reducing EMI radiation and TV with this lead - Google Patents
Power lead for reducing EMI radiation and TV with this lead Download PDFInfo
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- CN201004343Y CN201004343Y CNU2007200173966U CN200720017396U CN201004343Y CN 201004343 Y CN201004343 Y CN 201004343Y CN U2007200173966 U CNU2007200173966 U CN U2007200173966U CN 200720017396 U CN200720017396 U CN 200720017396U CN 201004343 Y CN201004343 Y CN 201004343Y
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Abstract
The utility model discloses a power source down-lead and a TV with the down-lead, which is able to reduce EMI radiation. The utility model comprises an input down-lead and two output down-leads; wherein the first down-lead and the second down-lead are respectively connected to the first output terminal and the second output terminal of a power source switch; and the third input down-lead and the fourth down-lead are respectively connected to the third input terminal and the fourth input terminal of the power source switch. When the power source switch is closed, the first output terminal is communicated the third input terminal and the second output terminal is communicated the forth output terminal; in order to counteract the radiation in the down-leads, the first output down-lead is communicated the third input down-lead, so as to form a twisted pair; the second output down-lead and the forty input down-lead are formed a twisted pair. The utility model counteracts the radiation formed by the power source down-leads without adding magnetic loops by changing the twisting measure of the power source down-leads connected to the power source switch, thus effectively simplifying structure, lowing development cost and shortening development time.
Description
Technical field
The utility model belongs to the power supply lead wire technical field, is specifically related to a kind of stranded mode of power supply lead wire, with the EMI radiation of effective reduction power supply lead wire.
Background technology
For the electric equipment that needs Alternating Current Power Supply, in its power circuit, generally all be provided with ac power switch, Fig. 1 is the schematic diagram of mains switch.Wherein, 1,2,3,4 four circle is represented 4 binding posts on the ac power switch 6, the 5th, shift knob respectively.11,22 two lead-in wires are directly connected to power panel, and 33,44 two lead-in wires connect 220V and exchange input.When shift knob 5 was pressed, binding post 1 and 3 was connected, 2 and 4 connections, and the power panel of electric equipment gets electric, begins to start.When shift knob 5 was upspring, binding post 1 and 3 disconnected, 2 and 4 disconnections, dump, electric equipment shutdown.
For present plasm TV, because its special principle causes the EMI radiation of plasma circuit serious, particularly the radiation of 4 power supply lead wires is especially serious among Fig. 1.The way that tradition reduces power supply lead wire EMI radiation is that 11,22 two lead-in wires are made twisted-pair feeder, and 33,44 two lead-in wires are made twisted-pair feeder, as shown in Figure 2.Facts have proved: this twisted wire mode is relatively poor for reducing the EMI interference effect.This is that the EMI radiation of formation is cancelled out each other because it is that size of current in power supply lead wire 11 and 22,33 and 44 equates, direction is opposite that twisted-pair feeder reduces the prerequisite of EMI radiation.And in fact, because power supply lead wire 11,22 is received power panel, through a lot of devices on the power panel, comprise filter capacitor over the ground, also have various distributed inductances, electric capacity etc., cause power supply lead wire 11 and 22, electric current in 33 and 44 is also unequal, especially at high frequency (10M-100MHz) very big difference is arranged, thus radiation can not cancel out each other, still very serious.
In order effectively to reduce the EMI radiation, in present traditional design, need on power supply lead wire 11 and 22,33 and 44, add two or three magnet rings and could pass through to test complex structure, cost rising.
Summary of the invention
The utility model reduces the high problem of complex structure, cost that the EMI radiation of power supply lead wire is caused for the mode that solves available technology adopting and increase magnet ring, a kind of novel power supply lead wire that can effectively reduce the EMI radiation is provided, can be under the prerequisite that does not increase magnet ring by test, thereby effectively reduce cost, simplify the structure.
For solving the problems of the technologies described above, the utility model is achieved by the following technical solutions:
A kind of power supply lead wire that reduces the EMI radiation comprises two input leads and two output leads, wherein, first, second output lead respectively with the corresponding connection of first, second two lead-out terminals of mains switch; Three, the 4th input lead respectively with the 3rd, the 4 two the corresponding connection of input terminal of mains switch; When described mains switch was closed, first lead-out terminal and the 3rd input terminal were communicated with, and second lead-out terminal and four-input terminal are communicated with; For offsetting the radiation in the lead-in wire, described first output lead and the 3rd input lead form twisted-pair feeder, and second output lead and the 4th input lead form twisted-pair feeder.
In order to obtain better effect, described twisted-pair feeder is twisted with the fingers close more well more, and in the utility model, according to lead-in wire thickness difference, described twisted-pair feeder can be 1～3 sth. made by twisting for every centimetre, and preferred 2 twist with the fingers.
Described mains switch can be an alternating-current switch, the 3rd, the 4th input lead respectively with exchange live wire and exchange that zero line is corresponding to be connected.
Another goal of the invention of the present utility model is to provide a kind of television set that can effectively reduce the EMI radiation, in the television set internal circuit, comprise mains switch, corresponding with first, second output lead respectively connection of two lead-out terminals of first, second of described mains switch is connected to the power panel of television set by described first, second output lead; The the 3rd, the 4 two input terminal of mains switch respectively with the corresponding connection of the 3rd, the 4th input lead, be connected to power supply by described the 3rd, the 4th input lead; When described mains switch was closed, first lead-out terminal and the 3rd input terminal were communicated with, and second lead-out terminal and four-input terminal are communicated with; For offsetting the radiation in the lead-in wire, described first output lead and the 3rd input lead form twisted-pair feeder, and second output lead and the 4th input lead form twisted-pair feeder.
Described mains switch is an alternating-current switch, the 3rd, the 4th input lead respectively with the interchange live wire of outside 220V electric main with exchange that zero line is corresponding to be connected.In order better to be reduced the EMI radiation effect, described twisted-pair feeder is twisted with the fingers for every centimetre 1～3, in the utility model, twists with the fingers for preferred every centimetre 2.
Compared with prior art, advantage of the present utility model and good effect are: the utility model is connected the stranded mode of the power supply lead wire on the mains switch by change, under the prerequisite that does not increase magnet ring, the radiation that power supply lead wire is formed is just in time offset, thereby effectively simplify the structure, reduce development cost, saved manpower and materials, shortened the development time.
Description of drawings
Fig. 1 is the structural representation of existing power supply switch;
Fig. 2 is the stranded schematic diagram of conventional power source lead-in wire;
Fig. 3 is the stranded schematic diagram of power supply lead wire of the present utility model.
Embodiment
Below in conjunction with the drawings and specific embodiments the utility model is done explanation in further detail.
In order to offset formed EMI radiation in the power supply lead wire, the utility model proposes the stranded mode of power supply lead wire as shown in Figure 3.Wherein, first output lead 11 that is connected on first lead-out terminal 1 of mains switch 6 is twisted together with the 3rd input lead 33 that is connected on the 3rd input terminal 3, form twisted-pair feeder; Second output lead 22 that will be connected again on second lead-out terminal 2 twists together with the 4th input lead 44 that is connected on four-input terminal 4, forms twisted-pair feeder.Because electric current 33 flows to lead-in wire 11 from going between, therebetween without devices such as any inductance, electric capacity, therefore, the size of current of lead-in wire in 11 and 33 equates, direction is opposite, and the radiation of formation is just in time offset.Adopt this way, not adding magnet ring promptly can be by test.
Above-mentioned power supply lead wire is applied in the TV set circuit, and described mains switch 6 is the alternating-current switch in the television set, and wherein, first, second output lead 11,22 is connected to the power panel of television set; Three, the 4th input lead 33,44 respectively with the interchange live wire of outside 220V electric main with exchange that zero line is corresponding to be connected.11,33 twist together the formation twisted-pair feeder by going between, 22,44 twist together the formation twisted-pair feeder, the EMI radiation problem of the TV set power plate circuit that has effectively fallen.
Described twisted-pair feeder is stranded must be close more good more, according to the lead-in wire thickness, twists with the fingers for general every centimetre 1～3.The so-called sth. made by twisting, relative commentaries on classics 1 circle in the two ends that promptly go between is called 1 and twists with the fingers.In the utility model, twist with the fingers the formation twisted-pair feeder by every centimetre 2, facts have proved that reduction EMI radiation effect is remarkable.
Use the solution of reduction EMI provided by the utility model radiation, strengthened consistency, reduced development cost, shortened the development time, improved development efficiency, be adapted at promoting the use of in the tv product.
Certainly; above-mentioned explanation is not to be to restriction of the present utility model; the utility model also is not limited in above-mentioned giving an example, and variation, remodeling, interpolation or replacement that those skilled in the art are made in essential scope of the present utility model also should belong to protection range of the present utility model.
Claims (8)
1. the power supply lead wire that can reduce the EMI radiation comprises two input leads and two output leads, wherein, first, second output lead respectively with the corresponding connection of first, second two lead-out terminals of mains switch; Three, the 4th input lead respectively with the 3rd, the 4 two the corresponding connection of input terminal of mains switch; When described mains switch was closed, first lead-out terminal and the 3rd input terminal were communicated with, and second lead-out terminal and four-input terminal are communicated with; It is characterized in that: described first output lead and the 3rd input lead form twisted-pair feeder, and second output lead and the 4th input lead form twisted-pair feeder.
2. the power supply lead wire that reduces the EMI radiation according to claim 1 is characterized in that: described twisted-pair feeder is twisted with the fingers for every centimetre 1～3.
3. the power supply lead wire that reduces the EMI radiation according to claim 2 is characterized in that: described twisted-pair feeder is twisted with the fingers for every centimetre 2.
4. the power supply lead wire that reduces the EMI radiation according to claim 1 and 2 is characterized in that: described mains switch is an alternating-current switch, the 3rd, the 4th input lead respectively with exchange live wire and exchange that zero line is corresponding to be connected.
5. television set with power supply lead wire of the described EMI of the reduction radiation of claim 1, comprise mains switch, corresponding with first, second output lead respectively connection of two lead-out terminals of first, second of described mains switch is connected to the power panel of television set by described first, second output lead; The the 3rd, the 4 two input terminal of mains switch respectively with the corresponding connection of the 3rd, the 4th input lead, be connected to power supply by described the 3rd, the 4th input lead; When described mains switch was closed, first lead-out terminal and the 3rd input terminal were communicated with, and second lead-out terminal and four-input terminal are communicated with; It is characterized in that: described first output lead and the 3rd input lead form twisted-pair feeder, and second output lead and the 4th input lead form twisted-pair feeder.
6. television set according to claim 5 is characterized in that: described twisted-pair feeder is twisted with the fingers for every centimetre 1～3.
7. television set according to claim 6 is characterized in that: described twisted-pair feeder is twisted with the fingers for every centimetre 2.
8. according to claim 5 or 6 described television sets, it is characterized in that: described mains switch is an alternating-current switch, the 3rd, the 4th input lead respectively with exchange live wire and exchange that zero line is corresponding to be connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200173966U CN201004343Y (en) | 2007-01-12 | 2007-01-12 | Power lead for reducing EMI radiation and TV with this lead |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200173966U CN201004343Y (en) | 2007-01-12 | 2007-01-12 | Power lead for reducing EMI radiation and TV with this lead |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201004343Y true CN201004343Y (en) | 2008-01-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200173966U Expired - Fee Related CN201004343Y (en) | 2007-01-12 | 2007-01-12 | Power lead for reducing EMI radiation and TV with this lead |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201004343Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107068112A (en) * | 2017-06-05 | 2017-08-18 | 青岛海信电器股份有限公司 | Method of adjustment and device for electromagnetic interference peak value in display device |
-
2007
- 2007-01-12 CN CNU2007200173966U patent/CN201004343Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107068112A (en) * | 2017-06-05 | 2017-08-18 | 青岛海信电器股份有限公司 | Method of adjustment and device for electromagnetic interference peak value in display device |
| CN107068112B (en) * | 2017-06-05 | 2019-09-10 | 青岛海信电器股份有限公司 | For showing the method for adjustment and device of electromagnetic interference peak value in equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080109 Termination date: 20110112 |