CN1227680C - Contravariant transformer and discharge lamp firing circuit using the same contravariant transformer - Google Patents
Contravariant transformer and discharge lamp firing circuit using the same contravariant transformer Download PDFInfo
- Publication number
- CN1227680C CN1227680C CNB001355309A CN00135530A CN1227680C CN 1227680 C CN1227680 C CN 1227680C CN B001355309 A CNB001355309 A CN B001355309A CN 00135530 A CN00135530 A CN 00135530A CN 1227680 C CN1227680 C CN 1227680C
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- Prior art keywords
- secondary coil
- leg
- contravariant transformer
- coil
- discharge lamp
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-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F38/08—High-leakage transformers or inductances
- H01F38/10—Ballasts, e.g. for discharge lamps
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F38/12—Ignition, e.g. for IC engines
-
- 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
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
- H02M7/538—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a push-pull configuration
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Circuit Arrangements For Discharge Lamps (AREA)
- Inverter Devices (AREA)
Abstract
The subject of the invention is to solve the problem where the size of a discharge lamp lighting circuit becomes large due to wide space occupied by the inverter transformer on a printed circuit board. One primary coil 30 and plural secondary coils 40 are provided; and the respective secondary coils 40 are coupled in an electromagnetic way to the primary coil 30 with the same degree of coupling. In addition, the respective secondary coil 40 of the inverter transformer is connected to different discharge lamp.
Description
Technical field
The present invention relates to the inverter of cold cathode discharge tube at the primary illumination liquid crystal indicator back side etc. (below, be called discharge lamp).Be particularly related to contravariant transformer that can take out a plurality of outputs and the structure of using the discharge lamp firing circuit of this contravariant transformer.
Background technology
Along with the maximization of liquid crystal display picture, use the discharge lamp at its back side of a plurality of illuminations.The contravariant transformer (inverter transformer) that the discharge lamp igniting is used is generally the structure of single output type.Therefore, the number according to discharge lamp also will use a plurality of contravariant transformers.For example, load 2～4 contravariant transformers during 14 inches of picture dimensions, load 8 contravariant transformers when picture is 18 inches, and load 10 contravariant transformers 20 inches the time.
Its result, inversion (swing to or anti-stream) transformer has occupied the vast space on the printed circuit board (PCB).Therefore, the problem that has the discharge lamp firing circuit to maximize.In addition, the discharge lamp firing circuit was constituted as shown in Figure 17, with 1 contravariant transformer 5,2 discharge lamps 1,2 of lighting a fire in the past.In other words, by balanced capacitor C
1, C
2One end of the secondary coil 6 of contravariant transformer 5 is connected with discharge lamp 1,2 respectively.But, in this structure, because the electric currents of discharge lamp 2 itself flow through secondary coil 6, so the line of secondary coil 6 footpath chap and maximizing.Therefore, owing to can not make one of them igniting of discharge lamp 1,2, can not save balanced capacitor C so have
1, C
2Problem.
Summary of the invention
Therefore, the present invention has the structure that obtains a plurality of outputs with a contravariant transformer.In addition, the present invention constitutes the discharge lamp firing circuit by using such contravariant transformer, the discharge lamp firing circuit of a plurality of discharge lamps thereby available simple circuit configuration realizes can lighting a fire simultaneously.
To achieve these goals, the invention provides a kind of contravariant transformer, comprising: a pair of magnetic core, they constitute closed magnetic circuit; Primary coil and with the secondary coil of this primary coil electromagnetic coupled; It is characterized in that a wherein side of described a pair of magnetic core is provided with to same direction outstanding first leg and a plurality of second leg; Described secondary coil is provided with a plurality of; Package has described primary coil on described first leg, and described a plurality of second legs package respectively have described secondary coil; Described secondary coil is respectively with identical electromagnetic coupled degree and described primary coil electromagnetic coupled.
According to the present invention, a kind of lamp ignitor circuitry of putting also is provided, it comprises a contravariant transformer, this contravariant transformer has and input power supply primary coil that is connected and the secondary coil that is connected with discharge lamp; It is characterized in that described contravariant transformer has a pair of magnetic core and a plurality of secondary coil that constitutes closed magnetic circuit; A wherein side of described a pair of magnetic core is provided with to same direction outstanding first leg and a plurality of second leg; Package has described primary coil on described first leg, and described a plurality of second legs package respectively have described secondary coil; Described secondary coil is respectively with identical electromagnetic coupled degree and described primary coil electromagnetic coupled; On each described secondary coil of described contravariant transformer, connecting each discharge lamp respectively.
According to the present invention, a kind of lamp ignitor circuitry of putting also is provided, it comprises a contravariant transformer, this contravariant transformer has and input power supply primary coil that is connected and the secondary coil that is connected with discharge lamp; It is characterized in that having the discharge lamp of half number of the secondary wire number of turns of described inverter; Described contravariant transformer has a pair of magnetic core and a plurality of secondary coil that constitutes closed magnetic circuit; A wherein side of described a pair of magnetic core is provided with to same direction outstanding first leg and a plurality of second leg; Package has described primary coil on described first leg, and described a plurality of second legs package respectively have described secondary coil; Described secondary coil is respectively with identical electromagnetic coupled degree and described primary coil electromagnetic coupled; On the two ends of described discharge lamp, connecting the other end separately of a plurality of secondary coils of one end ground connection respectively.
Description of drawings
Fig. 1 represents the front elevation of first embodiment of contravariant transformer of the present invention.
Fig. 2 represents the plane graph of same contravariant transformer.
Fig. 3 represents along the amplification profile of the A-A line of Fig. 2.
Fig. 4 represents to remove the plane graph of upside of the same contravariant transformer of magnetic core.
Fig. 5 represents the plane graph of primary side coil frame.
Fig. 6 represents the front cross-sectional view of same bobbin.
Fig. 7 represents the profile of secondary side coil frame.
Fig. 8 represents the front cross-sectional view of same bobbin.
Fig. 9 represents the exploded perspective view of magnetic core.
Figure 10 represents the configuration of main parts figure of second embodiment of contravariant transformer.
Figure 11 represents the configuration of main parts figure of the 3rd embodiment of contravariant transformer.
Figure 12 represents the configuration of main parts figure of the 4th embodiment of contravariant transformer.
Figure 13 represents the circuit diagram of first embodiment of discharge lamp firing circuit.
Figure 14 represents the circuit diagram of second embodiment of discharge lamp firing circuit.
Figure 15 represents the circuit diagram of the 3rd embodiment of discharge lamp firing circuit.
Figure 16 represents the plane graph of reduced graph 4 counterparts.
Figure 17 represents the circuit diagram of example in the past of discharge lamp firing circuit.
Embodiment
Fig. 1～Fig. 4 represents an embodiment of contravariant transformer of the present invention, is as the structure example under the two output type situations.10, the 20th, the horizontal also bobbin of the insulating properties of row arrangement.As shown in Figure 4, with a bobbin 10 two bobbins 20 are installed opposed to each other.As shown in Figure 5 and Figure 6, the bobbin 10 square bodily form spool 12 of maxilla 11 and lower jaw 13, fillet that is shaped integratedly.A plurality of terminals 18 are installed on a side of the lower jaw 13 of bobbin 10.By at the upper surface of maxilla 11 and the lower surface otch of lower jaw 13, the thin portion 14,15 of the wall that wall thickness is partly thin is separately positioned on the part of maxilla 11 and lower jaw 13.
Two such as shown in Figure 7 and Figure 8 integrally formed maxillas 21 of bobbin 20 and lower jaw 23, columnar spool 22.A plurality of terminals 28,29 are installed on a side of lower jaw 23.Terminal 28 is used to connect printed circuit board (PCB), and the lead-in wire that short terminal 29 is used for secondary coil 40 connects.Each terminal 28,29 connects integratedly in the inside of bobbin 20.On maxilla 21 and lower jaw 23, also be respectively equipped with thinner wall section 24,25.In a side of lower jaw 23, be provided with near the groove 26 spool.
The primary coil 30 (Fig. 3) of coiling low-pressure side on the spool 12 of bobbin 10.The lead-in wire of primary coil 30 is connected to terminal 18.On the spool 22 of two bobbins 20, the on high-tension side secondary coil 40a that reels respectively, 40b (Fig. 4).In order to improve dielectric voltage withstand, the lead-in wire of secondary coil 40a, 40b is drawn out to lower jaw 23 times from groove 26 (Fig. 8) after, be connected on the short terminal 29.The number of turn of two secondary coil 40a, 40b is identical, and equidistant apart from primary coil 30. Secondary coil 40a, 40b carry out electromagnetic coupled with primary coil 30 respectively with the identical degree of coupling.
The a pair of magnetic core that symbol 50,60 expression magnetics constitute.As shown in Figure 9, in the magnetic core 50 of downside, form the leg 51, columned leg 52,53 of outstanding upward elongated shape in a narrow margin, elongated projection 54.Two legs 52,53 are opposed in a side of elongated leg 51 by projection 54. Leg 52,53 is positioned at along the longitudinal direction of leg 51.The elongated protrusion 54 that is provided with between leg 51 and the leg 52,53 is lower than the height of leg 51,52,53.Leg 51 is inserted in the hole of spool 12 of bobbin 10 of primary side.Leg 52,53 is inserted in the hole of spool 22 of bobbin 20 of different primary side.
In magnetic core 50, on the leg 52 and the position between the leg 53 that inserts respectively at the center of secondary coil 40a, 40b, be provided with notch 55.In addition, in magnetic core 60, with these notch 55 opposed positions on form notch 65.By being provided with these notchs 55,65, slacken two electromagnetic coupled between secondary coil 40a, the 40b, prevent interference by the magnetic flux of leg 52 and leg 53.The part of irregular plate shaped magnetic core 60 usefulness the legs 51,52,53 of periphery is docked with magnetic core 50, the formation closed magnetic circuit.Have again, needn't one be shaped as projection 54.In addition, leg 52,53 can be arranged on magnetic core 60 sides of upside, also can be arranged on two sides' the magnetic core 50,60.
The part of the thinner wall section 14,15,24,25 of two bobbins 10,20 is clamped by magnetic core 50 and magnetic core 60, and the magnetic core 50,60 by mutual bonding fixes.The projection 54 of magnetic core 50 is between two secondary coil 40a, 40b and the primary coil 30 as shown in Figure 4.Projection 54 has the effect that weakens the electromagnetic coupled between primary coil 30 and secondary coil 40a, the 40b.The number of turn of two secondary coil 40a, 40b is identical, carries out electromagnetic coupled by the identical degree of coupling to primary coil 30.Therefore, when packing this contravariant transformer into inverter, from the identical output voltage of each secondary coil 40a, 40b output.
Secondary coil 40 of the present invention is not limited to two, also can be provided with more than three.Under the situation that is provided with the secondary coil more than three, in two magnetic cores, also form and the peristome same between the leg of the magnetic core that inserts each secondary coil center respectively and leg with described notch 55,65.Therefore, the electromagnetic coupled between the adjacent secondary coil is descended.Figure 10 and Figure 11 represent to be provided with the different structure example that three secondary coil 40a, 40b, 40c form three output type situations.The contravariant transformer of Figure 10 moves to secondary coil 40a, the 40c at two ends near the primary coil 30, configuration each secondary coil 40a, 40b, 40c on the position that obtains the same electromagnetic degrees of coupling with respect to primary coil 30.
On the other hand, the contravariant transformer of Figure 11 disposes secondary coil 40a, 40b, 40c in a straight line side by side, configuration primary coil 30 on the position beyond this straight line.Only in such configuration, be that to be in the secondary coil 40b of nearest central authorities of primary coil 30 big with respect to the electromagnetic coupled degree of primary coil 30, and it is little to be in other secondary coil 40a, the 40c of distant positions.Therefore, by comparing in modes such as central portion 54b reduce with end 54a, 54c, height or thickness in the projection 54 of design phase configuration magnetic core make that the electromagnetic coupled degree of each secondary coil 40a, 40b, 40c is identical.
Have again, do not form the projection 54 of magnetic core, by forming to such an extent that carefully dispose electromagnetic coupled degree also passable than other secondary coil 40a, 40c the wire rod of the secondary coil 40b of central authorities.In addition, replace the configuration of electromagnetic coupled degree, other secondary coil of turn ratio 40a, the 40c of the secondary coil 40b by making central authorities are few, also can make the output voltage unanimity of each secondary coil 40a, 40b, 40c.
Figure 12 is the structure example that is provided with the six output type situations of six secondary coil 40a～40f.Six secondary coils are configured on straight line separately the secondary series of first row of side by side 40a, 40b, 40c and 40d, 40e, 40f.Primary coil 30 is in the position in two row that are sandwiched in secondary coil.The projection 54 of configuration magnetic core between secondary coil 40a～40f and primary coil 30, and adjust, make each secondary coil 40a～40f identical with the electromagnetic coupled degree of primary coil 30.The terminal 28,29 that secondary coil 40a～40f uses is outstanding from the opposed two sides of contravariant transformer, and the terminal 18 of primary coil 30 usefulness is outstanding from the another side.
Figure 13 represents to use light a fire the simultaneously example of the inverter circuit under two discharge lamps, 1,2 situations of lose-lose removing from mould contravariant transformer of the present invention.Symbol 70 has omitted when above-mentioned explanation, but for example be on the spool 12 of bobbin 10 with primary coil 30 reel, going between is connected feedback coil on the terminal 18.In addition, Q
1, Q
2Be the switching transistor of recommending connection, R is a biasing resistor, and Cc is the resonant capacitor that is connected in parallel with primary coil 30.The centre tap of primary coil 30 is connected to not shown input power supply by choke L.
The other end and the discharge lamp 1 of the secondary coil 40a of one end ground connection are connected in series, and the other end of discharge lamp 1 is grounded.In addition, the other end and the discharge lamp 2 of the secondary coil 40b of an end ground connection is connected in series, and the other end of discharge lamp 2 is grounded.
Below, the situation of access power supply in the inverter circuit of consideration Figure 13.Wherein, if a discharge lamp of two discharge lamps 1,21 igniting earlier, the impedance of Dian Huo discharge lamp 1 reduces significantly so, and the voltage of secondary coil 40a side sharply descends.Because the voltage of electromagnetic coupled big this moment of the secondary coil 40b side between secondary coil 40a, the 40b descends together, so the problem that has another discharge lamp 2 to misfire.But, as contravariant transformer T, reduce in use under the situation of the such contravariant transformer of the present invention in Fig. 1～4 of the coupling between secondary coil 40a, 40b, do not cause the voltage of the secondary coil 40b side of this moment to descend.Therefore, can make another discharge lamp 2 igniting really.
In the inverter circuit of Figure 13, contravariant transformer is used two discharge lamps of lighting a fire as dual output.But, also can as shown in Figure 14 the single output type of this contravariant transformer as times voltage be used.In other words, the secondary coil 40a of contravariant transformer T and the end of secondary coil 40b are distinguished ground connection.And, the unearthed side's of secondary coil 40a and secondary coil 40b end is connected in series to the two ends of discharge lamp 1 respectively.Like this, with 2 times the voltage discharge lamp 1 of lighting a fire.
Have, the primary side of contravariant transformer T has the structure identical with Figure 13 circuit again.When contravariant transformer is used times voltage, be used for the half discharge lamp of secondary coil.Therefore, be connected in series also passable at the two ends of each discharge lamp with different secondary coil.
Figure 15 is to use the example of the inverter circuit under three discharge lamp 1～3 situations of three output type contravariant transformer T igniting shown in Figure 11.Each secondary coil 40a, 40b of one end ground connection, the other end of 40c are connected in series to discharge lamp 1,2,3 respectively.The other end ground connection of discharge lamp 1,2,3.Under the situation of the contravariant transformer that uses six such output types of Figure 12, each secondary coil 40a～40f is connected different discharge lamps respectively, six lamps of lighting a fire maybe can be with light a fire three discharge lamps of half of each secondary coil 40a～40f number of times voltage.
When the igniting discharge lamp, apply the high voltage of about 1500V at the two ends of secondary coil.Magnetic core by distributed capacitance and insulation resistance and the loop coupling of secondary coil electricity reaches the high voltage about 800V at this moment.Therefore, the danger of the discharge of causing arranged between the wiring figure of the printed circuit board (PCB) that transformer has been installed and magnetic core.But, be in the other direction each other by the coiling direction of two secondary coil 40a, 40b in the lose-lose removing from mould contravariant transformer that makes Fig. 1～Fig. 4, can prevent the generation of this discharge.As described below, this is to be zero potential because can make the current potential of the magnetic core 50,60 in transformer when work.Figure 16 represents this embodiment, and arrow 45a represents the coiling direction of secondary coil 40a, and arrow 45b represents the coiling direction of secondary coil 40b.The B-B line of Figure 16 is the line by the intermediate point of secondary coil 40a, 40b and primary coil 30 central authorities.The coiling direction of secondary coil 40a, 40b is that bound pair claims with the B-B line.In addition, in this case, it is boundary's symmetrical structure with B-B lines such as bobbins also that the shape of magnetic core has.
For example, suppose that secondary coil 40a is from terminal 28a
1Side begins to reel and reel and finish to terminal 28a
2Side, secondary coil 40b is from terminal 28b
1Side begins to reel and reel and finish to terminal 28b
2Side.When the inverter circuit of Figure 13 that this contravariant transformer is packed into, terminal 28a
1With terminal 28b
1Be equivalent to tie point P respectively
1, tie point P
2, terminal 28a
2With terminal 28b
2Be equivalent to common tie point P
3
When the work of inverter circuit, produce second magnetic flux of first magnetic flux of leg 51 by magnetic core 50 (Fig. 9) and magnetic core 60, leg 53 and the leg 51 by magnetic core 50 and magnetic core 60, leg 52.First magnetic flux and second magnetic flux are same way as, but secondary coil 40a, the 40b number of turn is identical and the coiling direction difference.Therefore, from the voltage of each secondary coil 40a, 40b output, i.e. tie point P
1With tie point P
2Current potential respectively size is identical and polarity is opposite.On the other hand, be in the tie point P of secondary coil 40a, 40b mid point
3Be zero potential.
As mentioned above, this contravariant transformer is that the boundary is made fully symmetrically with center line B-B line.The coiling direction of two secondary coil 40a, 40b is symmetry also.Therefore, between secondary coil 40a and the magnetic core 50,60, and insulation impedance between secondary coil 40b and the magnetic core 50,60 and distributed capacitance etc. equate.Therefore, when the operation of transformer, the current potential of magnetic core 50,60 equates the vanishing current potential with the current potential of the mid point of secondary coil 40a, 40b.Its result is being installed in contravariant transformer when using on the printed circuit board (PCB), can prevent to cause discharge between the wiring figure of printed circuit board (PCB) and magnetic core.
According to contravariant transformer of the present invention and discharge lamp firing circuit, owing to can so use the situation of contravariant transformer separately to compare, can reduce erection space and cost with a contravariant transformer a plurality of discharge lamps of lighting a fire simultaneously with each discharge lamp.And, the effect that can shorten wiring distance is arranged.And, because the driving frequency of each discharge lamp is identical, obtain synchronously, so do not produce beat noise and flicker.
In addition, the winding direction of the secondary coil by lose-lose removing from mould contravariant transformer of the present invention is a rightabout, obtains between magnetic core and wiring figure the dangerous high contravariant transformer of reliability of discharge.
Claims (7)
1. contravariant transformer comprises:
A pair of magnetic core, they constitute closed magnetic circuit;
Primary coil and with the secondary coil of this primary coil electromagnetic coupled;
It is characterized in that,
A wherein side of described a pair of magnetic core is provided with to same direction outstanding first leg and a plurality of second leg;
Described secondary coil is provided with a plurality of;
Package has described primary coil on described first leg, and described a plurality of second legs package respectively have described secondary coil;
Described secondary coil is respectively with identical electromagnetic coupled degree and described primary coil electromagnetic coupled.
2. contravariant transformer as claimed in claim 1 is characterized in that, at the notch that forms on the described a pair of magnetic core between adjacent described second leg, reduces the electromagnetic coupled degree between the described secondary coil respectively.
3. contravariant transformer as claimed in claim 1 is characterized in that, described a plurality of secondary coils and described second leg are configured in a straight line, and described primary coil and described first leg are configured on the described straight line position in addition.
4. contravariant transformer as claimed in claim 1 is characterized in that, the described first leg width is narrow and be elongated rectangular, and described second leg is by disposing like that by the opposed respectively long side at described rectangle.
5. contravariant transformer as claimed in claim 1 is characterized in that, described secondary coil is made of two coils, and the coiling direction separately of described secondary coil is in the other direction each other.
6. put a lamp ignitor circuitry for one kind, it comprises a contravariant transformer, and this contravariant transformer has and input power supply primary coil that is connected and the secondary coil that is connected with discharge lamp;
It is characterized in that,
Described contravariant transformer has a pair of magnetic core and a plurality of secondary coil that constitutes closed magnetic circuit;
A wherein side of described a pair of magnetic core is provided with to same direction outstanding first leg and a plurality of second leg;
Package has described primary coil on described first leg, and described a plurality of second legs package respectively have described secondary coil;
Described secondary coil is respectively with identical electromagnetic coupled degree and described primary coil electromagnetic coupled;
On each described secondary coil of described contravariant transformer, connecting each discharge lamp respectively.
7. put a lamp ignitor circuitry for one kind, it comprises a contravariant transformer, and this contravariant transformer has and input power supply primary coil that is connected and the secondary coil that is connected with discharge lamp;
It is characterized in that,
Discharge lamp with half number of the secondary wire number of turns of described inverter;
Described contravariant transformer has a pair of magnetic core and a plurality of secondary coil that constitutes closed magnetic circuit;
A wherein side of described a pair of magnetic core is provided with to same direction outstanding first leg and a plurality of second leg;
Package has described primary coil on described first leg, and described a plurality of second legs package respectively have described secondary coil;
Described secondary coil is respectively with identical electromagnetic coupled degree and described primary coil electromagnetic coupled;
On the two ends of described discharge lamp, connecting the other end separately of a plurality of secondary coils of one end ground connection respectively.
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31067099A JP3676151B2 (en) | 1999-11-01 | 1999-11-01 | Inverter transformer |
| JP310670/1999 | 1999-11-01 | ||
| JP310670/99 | 1999-11-01 | ||
| JP329763/99 | 1999-11-19 | ||
| JP32976399A JP3553440B2 (en) | 1999-11-19 | 1999-11-19 | Inverter transformer |
| JP329763/1999 | 1999-11-19 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1298190A CN1298190A (en) | 2001-06-06 |
| CN1227680C true CN1227680C (en) | 2005-11-16 |
Family
ID=26566417
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB001355309A Expired - Fee Related CN1227680C (en) | 1999-11-01 | 2000-11-01 | Contravariant transformer and discharge lamp firing circuit using the same contravariant transformer |
Country Status (3)
| Country | Link |
|---|---|
| KR (1) | KR100376989B1 (en) |
| CN (1) | CN1227680C (en) |
| TW (1) | TWI227097B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWM273069U (en) | 2005-01-25 | 2005-08-11 | Taiwan Thick Film Ind Corp | Improved structure of transformer coil |
| JP4645647B2 (en) * | 2005-02-09 | 2011-03-09 | パナソニック株式会社 | Transformer and illumination device and display device using the same |
| US7919930B2 (en) | 2005-06-15 | 2011-04-05 | Panasonic Corporation | Coil component and display device using same |
-
2000
- 2000-10-31 TW TW089122905A patent/TWI227097B/en not_active IP Right Cessation
- 2000-10-31 KR KR10-2000-0064282A patent/KR100376989B1/en not_active IP Right Cessation
- 2000-11-01 CN CNB001355309A patent/CN1227680C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| KR100376989B1 (en) | 2003-03-26 |
| TWI227097B (en) | 2005-01-21 |
| CN1298190A (en) | 2001-06-06 |
| KR20010070179A (en) | 2001-07-25 |
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Granted publication date: 20051116 Termination date: 20101101 |