CN101404201B - Power supply device and its transformer - Google Patents
Power supply device and its transformer Download PDFInfo
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- CN101404201B CN101404201B CN2008101307844A CN200810130784A CN101404201B CN 101404201 B CN101404201 B CN 101404201B CN 2008101307844 A CN2008101307844 A CN 2008101307844A CN 200810130784 A CN200810130784 A CN 200810130784A CN 101404201 B CN101404201 B CN 101404201B
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- former limit
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Abstract
The invention discloses a power device with two outputs which mutually decouple, and a transformer of the power device; wherein, the power device comprises a power factor correction circuit, a multi-switch shifting circuit and a transformer; the transformer comprises a primary winding and at least two secondary windings; the input of the primary winding is connected with an AC current; at least one secondary winding is closely coupled to the primary winding; the output of the secondary winding is connected with a load or a rectifier circuit; at least the other secondary winding is loosely coupled to the primary winding and the output thereof is connected with an oscillation capacitor and a load; the multi-switch shifting circuit can be one of a push-pull circuit topology, a half-bridge circuit topology and a full-bridge circuit topology and controls the output by shifting the frequency. The power device realizes two outputs which are independent mutually and can reduce the power cost and the power dissipation as well.
Description
The application be submitted that Patent Office of the People's Republic of China, application number are 200610141780.7 on September 30th, 2006, denomination of invention divides an application for the one Chinese patent application of " supply unit and transformer thereof ".
Technical field
The present invention relates to appliance field, the supply unit and the transformer thereof of a kind of two-way output that is specifically related to use in the electrical equipment.
Background technology
Liquid crystal indicator comprises backlight module and liquid crystal panel, and backlight module is used to said non-luminous liquid crystal panel own light source is provided.No matter backlight module or liquid crystal panel, all needing power supply is its power supply.
Consult Fig. 1; Application scenario at some liquid crystal indicator; In the application like the two-in-one power supply of LCD TV; Except providing the lamp tube drive power of high-voltage alternating to tube load in the backlight module, the low-voltage DC that an isolation also need be provided is to the control in the liquid crystal panel and image processing circuit and power amplifier power supply, and this low-voltage dc power supply is called the control power supply.
Control power supply output 18～24V direct current is exported 12V to power amplifier among the figure, 5V, and the 5VSTB direct current is to control and image processing circuit.
After the AC rectification input, also must between rectification circuit and lamp tube drive circuit, add a circuit of power factor correction usually, so liquid crystal television power supply generally have three more powerful power circuits at least in addition.In these three power circuits, lamp tube drive circuit and circuit of power factor correction are single because of controlling object, the circuit standard of comparison; And the control power supply is because the difference of subscriber line circuit, sequential are different, each is different and standard is the poorest for output voltage, thereby is unfavorable for the unified and large-scale production of standard of liquid crystal indicator power supply.Said in addition three large power supply costs are also higher, and conversion efficiency is also poor.
Summary of the invention
The technical problem that the present invention will solve provides a kind of new-type two-way and exports the transformer of mutual decoupling zero.
The technical problem that the present invention will solve is that a kind of supply unit cheaply also is provided.
For solving above-mentioned first technical problem; The objective of the invention is to realize: a kind of transformer is provided through following technical scheme; Comprise former limit winding and at least two secondary windings; The input of said former limit winding connects interchange, at least one said secondary winding and former limit winding close-coupled, another said secondary winding and former limit winding loose couplings at least; Said secondary winding and former limit winding close-coupled are meant that secondary winding and former limit winding form the concentric circles stepped construction around the transformer core post, and said secondary winding and former limit winding loose couplings are meant that the secondary winding does not form the concentric circles stepped construction with former limit winding.
For solving above-mentioned second technical problem; The objective of the invention is to realize: a kind of supply unit is provided through following technical scheme; Comprise transformer, said transformer comprises former limit winding and at least two secondary windings, and the input of said former limit winding connects interchange; At least one said secondary winding and former limit winding close-coupled, another said secondary winding and former limit winding loose couplings at least; Said secondary winding and former limit winding close-coupled are meant that secondary winding and former limit winding form the concentric circles stepped construction around the transformer core post, and said secondary winding and former limit winding loose couplings are meant that the secondary winding does not form the concentric circles stepped construction with former limit winding; The output of the loosely-coupled secondary winding of said and former limit winding is serially connected with electric capacity, or with after an electric capacity is parallelly connected again with a capacitances in series, the leakage inductance of the loosely-coupled secondary winding of said and former limit winding and said electric capacity constitute oscillating circuit, drive load together.
Preferably; The secondary winding quantity of said formation oscillating circuit is two; By connecing tube load and electric capacity after the voltage stack series connection, the output of two secondary windings of the said formation oscillating circuit dividing potential drop that is connected in parallel respectively detects electric capacity, and said dividing potential drop detects the neutral earthing of electric capacity.
Preferably, said at least one with the closely-coupled secondary winding of former limit winding quantity be two, be connected in series with the voltage stacked system.
Preferably; Said number transformer is two; The former limit parallel connection of two transformers, the closely-coupled secondary winding voltage overlapped in series of two transformers, the loosely-coupled secondary winding of two transformers connects tube load and electric capacity after superposeing by Voltage Series; The output of the loosely-coupled secondary winding of said two transformers dividing potential drop that is connected in parallel respectively detects electric capacity, and said dividing potential drop detects the neutral earthing of electric capacity.
Preferably, further be included as said transformer the many switch transformed circuits that exchange input be provided, said many switch transformed circuits be through the push-pull circuit topology that changes FREQUENCY CONTROL output, half-bridge circuit is topological or the full-bridge circuit topological circuit.
Preferably, further comprise circuit of power factor correction, its output HVDC is to said many switch transformed circuits.
Preferably, the output of the closely-coupled secondary winding of said and former limit winding is through rectification circuit rear drive load.
Preferably, the voltage of said driving load is any magnitude of voltage among 18～24V direct voltage.
Preferably, the creepage distance between said and former loosely-coupled secondary winding of limit winding and the former limit winding is at least 6 millimeters.
More than first technical scheme can find out; Because the special structure of transformer of the present invention; The output of two-way difference in functionality can be provided; Can be used for driving fluorescent tube with the former limit of the transformer loosely-coupled secondary winding of winding, can be used for supplying power to subscriber line circuit with the former limit of the transformer closely-coupled secondary winding of winding.Compare the existing power supply technology, omitted and be specifically designed to the control power supply that drives subscriber line circuit, cost greatly reduces, and power consumption also effectively reduces.In addition; Because with former limit winding close-coupled; The low-voltage dc voltage of its rectification of transformer secondary winding output that drives other circuit is irrelevant with the control frequency of many switch transformed circuits, and its stability depends on the stable of circuit of power factor correction output, but normal power supply is to power amplifier; To user's DC/DC circuit supply, the needed various voltages and the sequential of control and image processing circuit is provided simultaneously.
After this transformer formed a whole as supply unit and liquid crystal display screen, the output of power supply can be normalized to a kind of voltage, is easy to the formation standard, was user-friendly to, thereby laid the foundation for producing in enormous quantities.And a converter can also provide the control power supply in the control fluorescent tube, and obviously cost is extremely low.
More than second technical scheme can find out because supply unit of the present invention only needs a transformer, obtain two-way output and drive different loads respectively, compare the existing power supply technology, omitted a more powerful converter, cost greatly reduces; When many switch transformed circuits adopted the half-bridge circuit topology, owing to realized ZVT, power consumption effectively reduced.Have nothing to do with the direct voltage of its rectification output of the closely-coupled transformer secondary of former limit winding winding and the control frequency of many switch transformed circuits in addition, its stability depends on the stable of circuit of power factor correction output, can satisfy general requirement.Then directly be controlled by the control frequency of many switch transformed circuits with the output of the loosely-coupled transformer secondary of former limit winding winding, i.e. transformer two-way output is independent control respectively.Like this, export the supply unit of mutual decoupling zero with regard to the two-way of having realized a kind of low-cost high-efficiency.
Description of drawings
Fig. 1 is the circuit theory diagrams of prior art liquid crystal television power supply device;
Fig. 2 is the circuit theory diagrams of supply unit of the present invention;
Fig. 3 is the circuit diagram of supply unit first execution mode of the present invention;
Fig. 4 is the generalized section of transformer first execution mode of the present invention;
Fig. 5 is the generalized section of transformer second execution mode of the present invention;
Fig. 6 is the circuit diagram of supply unit second execution mode of the present invention;
Fig. 7 is the generalized section of transformer the 3rd execution mode of the present invention;
Fig. 8 is the generalized section of transformer the 4th execution mode of the present invention;
Fig. 9 is the circuit diagram of supply unit the 3rd execution mode of the present invention;
Figure 10 is the circuit diagram of supply unit the 4th execution mode of the present invention;
Figure 11 is the circuit diagram of supply unit the 5th execution mode of the present invention;
Figure 12 is the circuit diagram of many switch transformed circuit first execution modes in the supply unit of the present invention;
Figure 13 is the circuit diagram of many switch transformed circuit second execution modes in the supply unit of the present invention;
Figure 14 is the circuit diagram of many switch transformed circuit the 3rd execution modes in the supply unit of the present invention.
Embodiment
Consult Fig. 2, basic principle of the present invention is: after in lamp tube drive power, adopting two-way to export the switching power converters of mutual decoupling zero, the transformer in the lamp tube drive power is provided with two-way output.One of which removes to drive fluorescent tube with the loosely-coupled transformer secondary of former limit winding winding, can control the electric current in the fluorescent tube through changing switching frequency; Its two, then irrelevant with switching frequency with the low-voltage dc voltage of former limit closely-coupled transformer secondary winding rectification output, stability depends on the stable of circuit of power factor correction PFC output voltage.As long as a very low power standby power is set like this, just can omit the more powerful control power supply in the two-in-one power supply of prior art LCD TV shown in Figure 1.
Consult Fig. 3, a basic embodiment of supply unit of the present invention comprises a transformer T
r, said transformer T
rComprise a former limit winding N
1With two secondary winding N
2, N
3Said former limit winding N
1Input connect interchange, secondary winding N
2With former limit winding N
1Close-coupled, another secondary winding N
3With former limit winding loose couplings, output is serially connected with capacitor C
3, the leakage inductance of said secondary winding and said capacitor C
3Constitute oscillating circuit, drive load tube load R together
LCapacitor C
1With N
3And connect, be that dividing potential drop detects electric capacity.
Top supply unit only needs a transformer, obtains two-way output and drives fluorescent tube and other circuit respectively, compares the omission of prior art power supply and is specifically designed to other circuit control power supplys of driving, and cost greatly reduces, and power consumption effectively reduces.In addition, because with former limit winding N
1Close-coupled drives the low-voltage dc voltage and the former limit winding N of its rectification of transformer secondary winding output of other circuit
1The a-c cycle of input is irrelevant, but normal power supply is given power amplifier, satisfies user's demand.In addition, the present invention can be provided with a plurality of transformers according to actual needs, and combination in any constitutes the multichannel output that quantity is Duoed than transformer, also can reduce cost.
Below in conjunction with execution mode and accompanying drawing, describe the present invention.
Consult Fig. 3 again, supply unit first execution mode of the present invention comprises the rectification circuit, the circuit of power factor correction that connects the output of rectification circuit direct current that get access to grid, the transformer T that connects many switch transformed circuits of circuit of power factor correction HVDC output and connect many switch transformed circuits interchange outputs
1
Said transformer T
1Comprise a former limit winding N
1With two secondary winding N
2, N
3,Said former limit winding N
1Input connect many switch transformed circuits and exchange output, secondary winding N
2With former limit winding N
1Close-coupled, its output connects full bridge rectifier.The said secondary winding N that connects
2Full bridge rectifier output connect the inductance L of polyphone
fAnd capacitor C
fLoad R
2With said capacitor C
fParallel connection, the pressure drop in the load are V
2Another secondary winding N
3Meet tube load R
LThe capacitor C that is connected in series with fluorescent tube
3Or and N
3And the capacitor C that connects
1Constitute oscillating circuit with inductance L, offer the alternating current that fluorescent tube needs.Said many switch transformed circuits are the semi-bridge alternation circuit.
In this execution mode, secondary winding N
3With former limit winding loose couplings, N
1And N
3Leakage inductance form said inductance L, with said capacitor C
1And C
3Constitute oscillating circuit, drive said fluorescent tube.In other embodiments, inductance L can be independent of secondary winding N
3Promptly as shown in Figure 3, inductance L is and transformer T
1The independent inductance that separates, and secondary winding N
3With former limit winding close-coupled.
Consult Fig. 4, the secondary winding of said transformer and former limit winding close-coupled are meant secondary winding N
2Be positioned at former limit winding N
1And between the core post (not indicating), in the concentric plan that coexists, form the concentric circles stepped construction.Secondary winding N
3Then be wrapped in the core post other end, and with said former limit winding N
1/ secondary winding N
2Separate, not in a concentric plan, form at least creepage distance greater than 6mm.
Consult Fig. 5, in another embodiment, the secondary winding of said transformer and former limit winding close-coupled are meant secondary winding N
2Be positioned at two-layer former limit winding N
1Between, form the concentric circles sandwich structure.
Can find out that from above supply unit of the present invention only needs a transformer just can obtain two-way output, drives the subscriber line circuit of fluorescent tube and LCD TV respectively, compares prior art, omit and be specifically designed to the high-power control power supply that drives subscriber line circuit.Supply power to cpu circuit as long as replenish a very low power standby power, can realize application or other similar application of the two-in-one power supply of LCD TV, cost greatly reduces, and power consumption effectively reduces.In addition, because with former limit winding N
1Close-coupled, the secondary winding N of transformer
2The low-voltage dc voltage and the former limit winding N of its rectification output
1The a-c cycle of input is irrelevant, and is only related with the output of circuit of power factor correction, but its stability normal power supply is given power amplifier, satisfies user's demand.
Because the semi-bridge alternation circuit that adopts two-way to export mutual decoupling zero still is operated in the ZVT state, so conversion efficiency is still very high, the efficient of whole supply unit also is improved.Transformer secondary winding N
2The low-voltage dc voltage of output is designed in any magnitude of voltage among 18～24V, can be directly to the power amplifier power supply, and its stability meets the demands.Can on user circuit board, increase some simple DC/DC varying circuits and get final product as for control and the needed various control voltages of image processing circuit, controlling voltage and sequential thereof so just can be by controlling and image processing circuit directly controlled.
After adopting supply unit of the present invention; Liquid crystal television power supply can directly provide by liquid crystal display screen manufacturer is supporting; Have only 5V standby voltage and the 18～24V voltage that starts back output for user's interface; The user can save great amount of time and energy on power supply, and the cost of liquid crystal television power supply reduces because of large-scale standardized production greatly.After this transformer formed a whole as supply unit and liquid crystal display screen, the output of power supply can be normalized to a kind of voltage, is easy to the formation standard, was user-friendly to, thereby laid the foundation for producing in enormous quantities.And a converter can also provide the control power supply in the control fluorescent tube, and obviously cost is extremely low.
Except the application on liquid crystal television power supply, the switching power converters that two-way is exported mutual decoupling zero also can be applied in similar occasion.
Consult Fig. 6, supply unit second execution mode of the present invention and first execution mode are similar, and difference is:
One, the transformer secondary winding that connects tube load is divided into two, and becomes two secondary winding N by voltage stack series connection
3And N
31Two capacitor C of fluorescent tube serial connection
3, C
31, be connected on said two secondary winding N at last by voltage stack series connection
3And N
31Output.Said two secondary winding N
3And N
31The dividing potential drop that polyphone was gone back and was connected in output detects capacitor C
01, C
11, C
21And C
02, said dividing potential drop capacitor C
01, C
11And C
21, C
02Neutral earthing.C
01And C
11Between, C
21And C
02Between respectively as a voltage detecting point, output voltage V respectively
3And V
31
Two, said supply unit also comprises control circuit, and its input fetches from said dividing potential drop and detects capacitor C
01, C
11And C
21, C
02Voltage detecting value V
3And V
31, the output frequency control signal is to many switch transformed circuits, with the output voltage of control transformer.
Three, said transformer device structure such as Fig. 7 or shown in Figure 8.The former limit of transformer among Fig. 7 winding N
1Surround secondary winding N
2, the same with the structure of Fig. 4 is the close-coupled structure.Meet the secondary winding N of tube load Lamp
3And N
31Former limit, office winding N
1Two ends, and and former limit winding N
1With secondary winding N
2Certain creepage distance is arranged, such as 6mm at least.Transformer device structure among Fig. 8 and the transformer ' s type among Fig. 7 seemingly, difference is secondary winding N
2Be positioned at two-layer former limit winding N
1Between, form the concentric circles sandwich structure.
Above-mentioned execution mode improves the lamp tube drive circuit structure more, and has the advantage that is had with said first execution mode.
Consult Fig. 9, supply unit the 3rd execution mode of the present invention and second execution mode are similar, and difference is:
Be divided into two two secondary winding N with the closely-coupled transformer secondary of former limit winding winding
2And N
21Be connected in series by the voltage stacked system, the neutral earthing of two secondary windings, output connects full-wave rectifying circuit.This execution mode has the advantage that is had with said second execution mode.
Consult Figure 10, supply unit the 4th execution mode of the present invention and the 3rd execution mode are similar, and difference is:
Said number transformer is the former limit parallel connection of two, two transformers, and the closely-coupled secondary winding of two transformers is pressed the series connection of voltage stacked system, and its output connects full bridge rectifier; The loosely-coupled secondary winding of two transformers is pressed the series connection of voltage stacked system, and its output connects electric capacity rear drive fluorescent tube.Said many switch transformed circuits are the semi-bridge alternation circuit, and said semi-bridge alternation circuit comprises two switch Q
1And Q
2, two outputs of connection control circuit respectively.The input of control circuit then receives respectively from dividing potential drop and detects capacitor C
01, C
11And C
21, C
02Voltage detecting value V
3And V
31This execution mode has the advantage that is had with said the 3rd execution mode.
Consult Figure 11, supply unit the 5th execution mode of the present invention and the 4th execution mode are similar, and difference is:
The said secondary winding N that connects
2And N
21Rectification circuit be full-wave rectifying circuit, specifically: diode D
1And D
2Two cathode output ends unite two into one, and it always exports the termination inductance L
f, inductance L
fTwo ends meet a diode D respectively
3Negative pole and filter capacitor.Diode D
1And D
2Two positive poles meet secondary winding N respectively
2Hot junction and secondary winding N
2Cold junction.This execution mode has the advantage that is had with said the 4th execution mode.
More than many switch transformed circuits of all embodiment of the present invention; Its structure can be the many switch transformed circuits of push-pull circuit shown in Figure 12 topology formula, half-bridge circuit topology many switch transformed circuits of formula shown in Figure 13 or the many switch transformed circuits of full-bridge circuit topology formula shown in Figure 14, comprises 4 switch Q
1, Q
2, Q
3And Q
4
In other embodiments, fluorescent tube is not necessarily to be connected in series electric capacity, but is attempted by on the electric capacity, and electric capacity then constitutes oscillating circuit with transformer leakage inductance together.
More than a kind of supply unit provided by the present invention and transformer thereof are described in detail; Used specific case herein principle of the present invention and embodiment are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, the part that all can change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (10)
1. transformer; Comprise former limit winding and at least two secondary windings; The input of said former limit winding connects interchange, it is characterized in that: at least one said secondary winding and former limit winding close-coupled, another said secondary winding and former limit winding loose couplings at least; Said secondary winding and former limit winding close-coupled are meant that secondary winding and former limit winding form the concentric circles stepped construction around the transformer core post, and said secondary winding and former limit winding loose couplings are meant that the secondary winding does not form the concentric circles stepped construction with former limit winding.
2. a supply unit comprises transformer, and said transformer comprises former limit winding and at least two secondary windings, and the input of said former limit winding connects interchange, it is characterized in that: at least one said secondary winding and former limit winding close-coupled; At least another said secondary winding and former limit winding loose couplings; Said secondary winding and former limit winding close-coupled are meant that secondary winding and former limit winding form the concentric circles stepped construction around the transformer core post, and said secondary winding and former limit winding loose couplings are meant that the secondary winding does not form the concentric circles stepped construction with former limit winding;
The output of the loosely-coupled secondary winding of said and former limit winding is serially connected with electric capacity, or with after an electric capacity is parallelly connected again with a capacitances in series, the leakage inductance of the loosely-coupled secondary winding of said and former limit winding and said electric capacity constitute oscillating circuit, drive load together.
3. supply unit according to claim 2; It is characterized in that; The secondary winding quantity of said formation oscillating circuit is two; By connecing tube load and electric capacity after the voltage stack series connection, the output of two secondary windings of the said formation oscillating circuit dividing potential drop that is connected in parallel respectively detects electric capacity, and said dividing potential drop detects the neutral earthing of electric capacity.
4. supply unit according to claim 3 is characterized in that, said at least one with the closely-coupled secondary winding of former limit winding quantity be two, be connected in series with the voltage stacked system.
5. supply unit according to claim 2; It is characterized in that said number transformer is the former limit parallel connection of two, two transformers; The closely-coupled secondary winding voltage overlapped in series of two transformers; The loosely-coupled secondary winding of two transformers connects tube load and electric capacity by after the Voltage Series stack, and the output of the loosely-coupled secondary winding of said two transformers dividing potential drop that is connected in parallel respectively detects electric capacity, and said dividing potential drop detects the neutral earthing of electric capacity.
6. supply unit according to claim 2; It is characterized in that; Further be included as said transformer the many switch transformed circuits that exchange input be provided, said many switch transformed circuits be through the push-pull circuit topology that changes FREQUENCY CONTROL output, half-bridge circuit is topological or the full-bridge circuit topological circuit.
7. supply unit according to claim 6 is characterized in that, further comprises circuit of power factor correction, and its output HVDC is to said many switch transformed circuits.
8. according to each described supply unit of claim 2 to 7, it is characterized in that the output of the closely-coupled secondary winding of said and former limit winding is through rectification circuit rear drive load.
9. supply unit according to claim 8 is characterized in that, any magnitude of voltage of the output of the closely-coupled secondary winding of said and former limit winding among the voltage behind the rectification circuit is 18～24V direct voltage.
10. according to each described supply unit of claim 2 to 7, it is characterized in that: the creepage distance between loosely-coupled secondary winding of said and former limit winding and the former limit winding is at least 6 millimeters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101307844A CN101404201B (en) | 2006-09-30 | 2006-09-30 | Power supply device and its transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101307844A CN101404201B (en) | 2006-09-30 | 2006-09-30 | Power supply device and its transformer |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006101417807A Division CN100435247C (en) | 2006-09-30 | 2006-09-30 | Power apparatus and transformer thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101404201A CN101404201A (en) | 2009-04-08 |
| CN101404201B true CN101404201B (en) | 2012-04-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008101307844A Expired - Fee Related CN101404201B (en) | 2006-09-30 | 2006-09-30 | Power supply device and its transformer |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103259992B (en) * | 2013-04-01 | 2016-02-10 | 青岛海信电器股份有限公司 | Standby power circuit and idle method |
| CN104021920B (en) * | 2014-05-27 | 2016-09-28 | 华为技术有限公司 | Coupling inductance and power inverter |
| JP6409027B2 (en) * | 2016-07-07 | 2018-10-17 | 株式会社豊田中央研究所 | Power converter |
| CN106356179A (en) * | 2016-09-05 | 2017-01-25 | 深圳创维－Rgb电子有限公司 | LLC transformer, LLC switching power source and electrical equipment |
| CN106597940A (en) * | 2016-12-15 | 2017-04-26 | 合肥捷曼信息科技有限公司 | Data decoupling-based intelligent power source |
| CN109378990A (en) * | 2018-12-08 | 2019-02-22 | 中国科学院宁波材料技术与工程研究所 | A kind of drive electric power unit |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1763874A (en) * | 2004-10-19 | 2006-04-26 | 耀胜电子股份有限公司 | Transformer of converter |
| JP2006179419A (en) * | 2004-12-24 | 2006-07-06 | Minebea Co Ltd | Multi-lamp type discharge lamp lighting device |
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2006
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1763874A (en) * | 2004-10-19 | 2006-04-26 | 耀胜电子股份有限公司 | Transformer of converter |
| JP2006179419A (en) * | 2004-12-24 | 2006-07-06 | Minebea Co Ltd | Multi-lamp type discharge lamp lighting device |
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Effective date of registration: 20130125 Address after: 523000 Guangdong province Dongguan city Liaobu town Fushan manhole pit Industrial Zone Patentee after: Dongguan purple Electronic Technology Co., Ltd. Address before: 510000 No. 475 East Ring Road, Guangzhou, Guangdong Patentee before: Yang Dongping |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120425 Termination date: 20160930 |