CN201149763Y - Drive system with variable output phase - Google Patents
Drive system with variable output phase Download PDFInfo
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- CN201149763Y CN201149763Y CNU2007203111694U CN200720311169U CN201149763Y CN 201149763 Y CN201149763 Y CN 201149763Y CN U2007203111694 U CNU2007203111694 U CN U2007203111694U CN 200720311169 U CN200720311169 U CN 200720311169U CN 201149763 Y CN201149763 Y CN 201149763Y
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Abstract
The utility model relates to a drive system for a variable output phase and comprises a pulse-width modulation unit which generates a work periodic signal, a first drive unit, a second drive unit, a first transformer and a second transformer; both the first drive unit and the second drive unit obtain an input power and the work periodic signal to respectively drive the first transformer and the second transformer, so that the input power can be converted into a first drive power and a second drive power; at least one of the first drive unit and the second drive unit is connected and provided with a power phase control unit; the power phase control unit generates a drive unit driven phase which is modulated and connectively arranged through a phase switch signal, so that the first drive power and the second drive power outputted by the first transformer and the second transformer can be loaded by the same or different phase-driven back-end, in order to improve the disadvantage that the existing drive system can not change the output power phase.
Description
Technical field
The utility model relates to a kind of drive system of variable output phase, particularly relates to a kind of drive system that is applied to power conversion with the variable output phase of driving display device.
Background technology
LCD common in the daily life is except producing the Polarizer of change color, alignment film, beyond the elements such as liquid crystal, comprise that more one produces the module backlight of light, this module backlight needs a transverter that produces stable power to make this module backlight can for a long time stable work, and the electric power quality that this transverter produces has very big influence for the task performance and life-span of this module backlight, now this LCD problem of in R﹠D process, often needing to solve be this LCD when using naked eyes can see that picture produces the ripples line as the ripples, the reason that this phenomenon produces comprises factors such as electromagnetic interference (EMI) and frequency of operation, and most situation can be improved by adjusting this module backlight (that is adjusting the driving electric that this transverter is exported), and the framework that should have transverter now comprises an electric power source, one pulse-width modulation unit, one voltage transformation unit, a plurality of switch elements and a plurality of loads that are connected in this voltage transformation unit secondary side, wherein this voltage transformation unit comprises that a plurality of transformers obtain an input electric power and be converted to a driving electric and drive a plurality of loads from this electric power source, and this pulse-width modulation unit produces a working period signal, receive this working period signal by these a plurality of switch elements and switch the sequential of a plurality of transformers of flowing through, make a plurality of transformers produce homophase or anti-phase driving electric, in the above-mentioned existing circuit framework, because the conducting of these a plurality of switch elements order is fixing when circuit design, therefore the driving electric phase place of this transformer generation is also fixed, " the coupled mode lamp tube driver " that the previous patent of such framework such as TaiWan, China patent certificate are M318876 number, driving electric phase place shown in this creation is all fixing, though have and easily reach synchronous advantage, but can't adjust the phase place of driving electric, when the LCD that drives produces the ripples line, can't improve by adjusting the driving electric phase place; This transverter does not have the ability of the phase place of adjusting driving electric, must adjust other may command factors such as frequency of driving electric after the LCD that drives produces the ripples line improves, limited the working range of this LCD, more remote effect the inhibition ability of this LCD to water ripple phenomenon, truly have necessity of improvement.
Summary of the invention
The purpose of this utility model is, overcome existing transverter and can't adjust the defective of output power phase place, and provide a kind of exportable a plurality of driving electric to drive the transverter framework of a plurality of loads, technical matters to be solved is to make the phase place of its a plurality of driving electric that produce for adjusting, reach to utilize and adjust this driving electric phase place and have more adjustment modes to improve the purpose of the ripples line of LCD, be very suitable for practicality.
The purpose of this utility model and to solve its technical matters be to adopt following technical scheme to realize.Drive system according to a kind of variable output phase that the utility model proposes, comprise that one produces the pulse-width modulation unit of a working period signal, one receives first driver element and one second driver element of this working period signal, one to be subjected to this first driver element and one second drive unit drives will import power conversions be first transformer and one second transformer that first driving electric and one second driving electric distinctly drive the rear end load, at least the one of this first driver element and second driver element connects and establishes a power phase control module, this power phase control module produces a phase place switching signal modulation and connects the drive unit drives phase place of establishing, and makes this first transformer must be the rear end load of identical or different phase driven with first driving electric and second driving electric of this second transformer conversion input electric power.
The purpose of this utility model and solve its technical matters and can also be able to be further achieved by the following technical measures.
The drive system of aforesaid variable output phase, wherein said connect the driver element of establishing the power phase control module comprise one first actuating switch, one and the electric power conducting sequential of this first actuating switch second actuating switch and that possesses phase differential connect the phase place change-over switch of establishing this first actuating switch and this second actuating switch, and this phase place change-over switch is subjected to this phase place switching signal to drive to decide to connect this first actuating switch or this second actuating switch.
The drive system of aforesaid variable output phase, wherein said first actuating switch and this second actuating switch are half-bridge resonance loop or full-bridge resonant tank, perhaps are a push-pull type switch loop.
The drive system of aforesaid variable output phase, wherein said phase place change-over switch has that two on-off elements are located at this input electric power respectively or this working period signal is sent on the circuit of this first actuating switch and this second actuating switch, and must decide conducting or deliver to this first actuating switch or second actuating switch by this input electric power or this working period signal according to this phase place switching signal.
The drive system of aforesaid variable output phase, wherein said phase place change-over switch more comprises a phase inverter and is connected in this first actuating switch or this second actuating switch, makes this phase place switching signal be converted to a start signal and a shutdown signal and makes this first actuating switch and this second actuating switch conducting respectively or end.
The drive system of aforesaid variable output phase, the action of wherein said power phase control module is controlled by the triggering of a trigger element.
The drive system of aforesaid variable output phase, the wherein said power phase control module of establishing driver element that connects comprises the reference voltage source that one first comparer, one second comparer and provide reference voltage, the positive input terminal of this first comparer connects this reference voltage source and negative input end connects this trigger element, the negative input end of this second comparer connects this reference voltage source and positive input terminal connects this trigger element, produces this phase place switching signal by the voltage ratio of this reference voltage and this trigger element.
The drive system of aforesaid variable output phase, wherein said trigger element are a single-throw switch or a button or are a knob.
The drive system of aforesaid variable output phase, wherein said load are the light tube group that at least one discharge lamp is formed.
The utility model compared with prior art has tangible advantage and beneficial effect.Via as can be known above, in order to achieve the above object, the utility model provides a kind of drive system of variable output phase, this drive system comprises that one produces the pulse-width modulation unit of a working period signal, one first driver element, one second driver element, one first transformer and one second transformer, this first driver element and this second driver element are all obtained input electric power and this working period signal and are distinctly driven this first transformer and this second transformer should to import power conversions be one first driving electric and one second driving electric, and the one of this first driver element and this second driver element connects and establishes a power phase control module at least, this power phase control module produces a phase place switching signal modulation and connects the drive unit drives phase place of establishing, make this first transformer must be the rear end load of identical or different phase driven, reach the effect of adjusting phase differential between this first driving electric and this second driving electric with first driving electric and second driving electric of this second transformer conversion input electric power.
By technique scheme, the drive system of the variable output phase of the utility model has following advantage and beneficial effect at least:
The invention provides the transverter framework that a kind of exportable a plurality of driving electric drive a plurality of loads, and the phase place of a plurality of driving electric that produced be for adjusting, and can utilize to adjust this driving electric phase place and more adjustment modes are arranged to improve the ripples line of LCD.
In sum, the drive system of a kind of variable output phase of the utility model, comprise that one produces the pulse-width modulation unit of a working period signal, one first driver element, one second driver element, one first transformer and one second transformer, this first driver element and this second driver element are all obtained input electric power and this working period signal, and should to import power conversions be one first driving electric and one second driving electric to drive this first transformer and this second transformer respectively, at least the one of this first driver element and this second driver element connects and establishes a power phase control module, this power phase control module produces a phase place switching signal modulation and connects the drive unit drives phase place of establishing, make this first transformer must be the rear end load of identical or different phase driven, to improve the disappearance that existing drive system can't change the output power phase place with first driving electric and second driving electric of this second transformer output.The utlity model has above-mentioned plurality of advantages and practical value, no matter it all has bigger improvement on system architecture or function, obvious improvement is arranged technically, and produced handy and practical effect, and more existing transverter has the outstanding effect of enhancement, thereby being suitable for practicality more, and having the extensive value of industry, really is a new and innovative, progressive, practical new design.
Above-mentioned explanation only is the general introduction of technical solutions of the utility model, for can clearer understanding technological means of the present utility model, and can be implemented according to the content of instructions, and for above-mentioned and other purposes, feature and advantage of the present utility model can be become apparent, below especially exemplified by preferred embodiment, and conjunction with figs., be described in detail as follows.
Description of drawings
Fig. 1 is a framework calcspar of the present utility model.
Fig. 2 is the framework calcspar of this second driver element.
Fig. 3 is that one of this phase place change-over switch is implemented the aspect synoptic diagram.
Fig. 4 is the output waveform figure () of this first driver element and this second driver element.
Fig. 5 is the output waveform figure (two) of this first driver element and this second driver element.
Embodiment
For further setting forth the utility model is to reach technological means and the effect that predetermined goal of the invention is taked, below in conjunction with accompanying drawing and preferred embodiment, to its embodiment of drive system, structure, feature and effect thereof according to the variable output phase that the utility model proposes, describe in detail as after.
Relevant detailed description of the present utility model and technology contents now just cooperate graphic being described as follows:
An embodiment calcspar of the present utility model sees also Fig. 1, the utility model is a kind of drive system of variable output phase, this drive system comprises that one produces the pulse-width modulation unit 2 of a working period signal, one first driver element 31, one second driver element 32, one first transformer 41 and one second transformer 42, wherein this first driver element 31 and this second driver element 32 connections one electric power source 1 obtain an input electric power, and obtain this working period signal, and driving this first transformer 41 and this second transformer 42 according to this working period signal, should to import power conversions be that one first driving electric and one second driving electric are with driving out of the ordinary rear end load 8, this first transformer 41 more can be connected a back coupling unit 7 with the output terminal of this second transformer 42, produces a feedback signal by this back coupling unit 7 and adjusts the working period signal that this pulse-width modulation unit 2 produces; Wherein this drive system more comprises and a power phase control module 5, at least the one of this first driver element 31 and this second driver element 32 connects and establishes this power phase control module 5, this power phase control module 5 produces a phase place switching signal modulation and connects the drive unit drives phase place of establishing, and makes this first transformer 41 must be the load 8 of identical or different phase driven rear end with first driving electric and second driving electric of these second transformer, 42 conversion input electric power; In the embodiment in figure 1, this power phase control module 5 connects establishes this second driver element 32, and make this second driver element 32 drive the phase change of these second transformer, 42 these second driving electric of output by producing this phase place switching signal, make whereby this second driving electric must with this first driving electric same phase or different phase mutually; Again, the action of this power phase control module 5 is controlled by the triggering of a trigger element 6, this trigger element 6 can be a single-throw switch or a button, it perhaps is a knob, the user can trigger this power phase control module 5 by this trigger element 6 of control makes this second driving electric change phase place, reaches the purpose of the phase differential of adjusting this first driving electric and this second driving electric.
See also Fig. 2, this figure is depicted as the enforcement framework calcspar of this second driver element 32, this second driver element 32 comprises one first actuating switch 321, one second actuating switch 322 and that possesses phase differential with the electric power conducting sequential of this first actuating switch 321 connects the phase place change-over switch 323 of establishing this first actuating switch 321 and this second actuating switch 322, this first actuating switch 321 and this second actuating switch 322 all are connected this electric power source 1 and this pulse-width modulation unit 2 to obtain this input electric power and this working period signal, this power phase control module 5 is arranged in the phase place change-over switch 323 of this second driver element 32 to transmit this phase place switching signal to this phase place change-over switch 323, and this phase place change-over switch 323 is subjected to this phase place switching signal to drive to decide and connects this first actuating switch 321 or this second actuating switch 322, because of the electric power conducting sequential of this first actuating switch 321 and this second actuating switch 322 possesses phase differential, make second driving electric that this second transformer 42 produces change phase place because of the staggered conducting of this first actuating switch 321 and this second actuating switch 322; Wherein, can utilize and this first actuating switch 321 is mode that reverse direction is connected in series this second transformer 42 with respect to this second actuating switch 322 reaches and make first actuating switch 321 and the electric power conducting sequential of this second actuating switch 322 possess phase differential.
This phase place change-over switch 323 must be controlled on the circuit that this input electric power or this working period signal be sent to this first actuating switch 321 and this second actuating switch 322 in the foregoing description, and must decide conducting or deliver to this first actuating switch 321 or second actuating switch 322 according to this phase place switching signal by this input electric power or this working period signal, see also Fig. 3, this figure is depicted as an enforcement aspect of this phase place change-over switch 323 in the foregoing description, this phase place change-over switch 323 comprises two on-off elements, and two on-off elements of this phase place change-over switch 323 are located at respectively on the circuit that this input electric power is sent to this first actuating switch 321 and this second actuating switch 322, and these power phase control module 5 enforcement aspects can comprise one first comparer 51, one second comparer 52 and one provides the reference voltage source 53 of reference voltage, the positive input terminal of this first comparer 51 connects this reference voltage source 53 and negative input end connects this trigger element 6, the negative input end of this second comparer 52 connects this reference voltage source 53 and positive input terminal connects this trigger element 6, voltage ratio by this reference voltage and this trigger element 6 produces this phase place switching signal, and must determine this phase place change-over switch 323 to connect this first actuating switch 321 or second actuating switch 322 according to this phase place switching signal, form the state of this first actuating switch 321 and the 322 staggered conductings of this second actuating switch, and then change the phase place of this second driving electric, and two on-off elements of this phase place change-over switch 323 also can be positioned on the circuit that this working period signal is sent to this first actuating switch 321 or this second actuating switch 322, obtain this working period signal and move to select one in this first actuating switch 321 or this second actuating switch 322; In addition this power phase control module 5 also can use the relatively voltage of this reference voltage source 53 and this modulation unit 6 of single comparer, and must comprising a phase inverter, phase place change-over switch 323 is connected in this first actuating switch 321 or this second actuating switch 322, making this phase place switching signal be converted to a start signal and a shutdown signal makes this first actuating switch 321 with these second actuating switch, 322 conductings or end respectively, above-mentioned this first actuating switch 321 that makes is known for this technical field person with the technology of these second actuating switch, 322 staggered conductings, changes aspect so repeat no more it.
The oscillogram of the foregoing description sees also Fig. 1, Fig. 4 and Fig. 5, Fig. 1 is respectively a-signal and B signal in the output of this first driver element 31 and these second driver element, 32 rear ends, Fig. 4 and Fig. 5 are the a-signal that records and the current waveform of B signal, measured a-signal is the first fixing driving electric of phase place, and the B signal that records is this second driving electric; When this exciting curent of first actuating switch, 321 conductings of this second driver element 32, can find out that the phase place of this second driving electric is identical with this first driving electric by Fig. 4, this trigger element 6 triggers these power phase control module 5 these phase place switching signals of output and changes the phase place of this second driving electric, make this second driving electric and this first driving electric out of phase form phase differential (as shown in Figure 5), thereby reach the purpose of this utility model.
The above embodiments can be half-bridge resonance loop or full-bridge resonant tank with first actuating switch of implementing in the aspect 321 with this second actuating switch 322, this first driver element 31 also is corresponding half-bridge resonance loop or full-bridge resonant tank, this second driver element 32 more can be push-pull type switch loop (push-pull) with this first driver element 31, and the light tube group that this load 8 is formed at least one discharge lamp, and, this power phase control module 5 also can be arranged in this first driver element 31 or be arranged in two driver elements simultaneously, reaches the effect that enlarges driving electric phase modulation scope.
The above, it only is preferred embodiment of the present utility model, be not that the utility model is done any pro forma restriction, though the utility model discloses as above with preferred embodiment, yet be not in order to limit the utility model, any those skilled in the art are not in breaking away from the technical solutions of the utility model scope, when the technology contents that can utilize above-mentioned announcement is made a little change or is modified to the equivalent embodiment of equivalent variations, in every case be the content that does not break away from technical solutions of the utility model, according to technical spirit of the present utility model to any simple modification that above embodiment did, equivalent variations and modification all still belong in the scope of technical solutions of the utility model.
Claims (9)
1. the drive system of a variable output phase, comprise that it is first transformer (41) and one second transformer (42) that first driving electric and one second driving electric distinctly drive rear end load (8) that a pulse-width modulation unit (2), that produces a working period signal receives that first driver element (31) of this working period signal and one second driver element (32), driven by this first driver element (31) and one second driver element (32) will import power conversions, is characterized in that:
At least the one of this first driver element (31) and second driver element (32) connects and establishes a power phase control module (5), this power phase control module (5) produces a phase place switching signal modulation and connects the drive unit drives phase place of establishing, and makes this first transformer (41) must be identical or different phase driven rear end load (8) with first driving electric and second driving electric of this second transformer (42) conversion input electric power.
2. the drive system of variable output phase according to claim 1, it is characterized in that this connects the driver element of establishing power phase control module (5) and comprises one first actuating switch (321), one second actuating switch (322) and that possesses phase differential with the electric power conducting sequential of this first actuating switch (321) connects the phase place change-over switch (323) of establishing this first actuating switch (321) and this second actuating switch (322), and this phase place change-over switch (323) is subjected to this phase place switching signal to drive to decide to connect this first actuating switch (321) or this second actuating switch (322).
3. the drive system of variable output phase according to claim 2 is characterized in that this first actuating switch (321) and this second actuating switch (322) are half-bridge resonance loop or full-bridge resonant tank, perhaps is a push-pull type switch loop.
4. the drive system of variable output phase according to claim 2, it is characterized in that this phase place change-over switch (323) has two on-off elements and is located at respectively on the circuit that this input electric power or this working period signal be sent to this first actuating switch (321) and this second actuating switch (322), and must decide conducting or deliver to this first actuating switch (321) or second actuating switch (322) according to this phase place switching signal by this input electric power or this working period signal.
5. the drive system of variable output phase according to claim 4, it is characterized in that this phase place change-over switch (323) more comprises a phase inverter and is connected in this first actuating switch (321) or this second actuating switch (322), make this phase place switching signal be converted to a start signal and a shutdown signal and make this first actuating switch (321) with this second actuating switch (322) conducting or end respectively.
6. the drive system of variable output phase according to claim 1 is characterized in that the action of this power phase control module (5) is controlled by the triggering of a trigger element (6).
7. the drive system of variable output phase according to claim 6, it is characterized in that this connects the power phase control module (5) of establishing driver element and comprises one first comparer (51), one second comparer (52) and one provides the reference voltage source (53) of reference voltage, the positive input terminal of this first comparer (51) connects this reference voltage source (53) and negative input end connects this trigger element (6), the negative input end of this second comparer (52) connects this reference voltage source (53) and positive input terminal connects this trigger element (6), produces this phase place switching signal by the voltage ratio of this reference voltage and this trigger element (6).
8. the drive system of variable output phase according to claim 6 is characterized in that this trigger element (6) is a single-throw switch or a button or is a knob.
9. the drive system of variable output phase according to claim 1 is characterized in that the light tube group that this load (8) is formed at least one discharge lamp.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007203111694U CN201149763Y (en) | 2007-12-28 | 2007-12-28 | Drive system with variable output phase |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007203111694U CN201149763Y (en) | 2007-12-28 | 2007-12-28 | Drive system with variable output phase |
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| Publication Number | Publication Date |
|---|---|
| CN201149763Y true CN201149763Y (en) | 2008-11-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNU2007203111694U Expired - Fee Related CN201149763Y (en) | 2007-12-28 | 2007-12-28 | Drive system with variable output phase |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107577088A (en) * | 2017-09-15 | 2018-01-12 | 深圳市华星光电半导体显示技术有限公司 | Intelligent light orientation drive system and its driving method |
-
2007
- 2007-12-28 CN CNU2007203111694U patent/CN201149763Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107577088A (en) * | 2017-09-15 | 2018-01-12 | 深圳市华星光电半导体显示技术有限公司 | Intelligent light orientation drive system and its driving method |
| CN107577088B (en) * | 2017-09-15 | 2021-01-26 | 深圳市华星光电半导体显示技术有限公司 | Intelligent optical alignment driving system and driving method thereof |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081112 Termination date: 20151228 |
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| EXPY | Termination of patent right or utility model |