CN100397198C - Synchronous operation set - Google Patents
Synchronous operation set Download PDFInfo
- Publication number
- CN100397198C CN100397198C CNB2004100382110A CN200410038211A CN100397198C CN 100397198 C CN100397198 C CN 100397198C CN B2004100382110 A CNB2004100382110 A CN B2004100382110A CN 200410038211 A CN200410038211 A CN 200410038211A CN 100397198 C CN100397198 C CN 100397198C
- Authority
- CN
- China
- Prior art keywords
- circuit
- vibration
- frequency
- self
- operation device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Circuit Arrangements For Discharge Lamps (AREA)
Abstract
The present invention relates to a synchronous operation device which comprises a lamp tube, a self oscillation converting circuit, a sampling and frequency generating circuit, a detecting and feedback circuit, a regulating and changing circuit and a voltage reduction circuit. The synchronous operation device sample natural vibration frequency from presetting sampling points of the self oscillation converting circuit or presetting sampling points of the self oscillation converting circuit and the voltage reduction circuit, and so control signals output by the regulating and changing circuit can synchronize the natural vibration frequency. Thereby, the present invention can improve the ripple phenomenon of output high voltage and can enhance the stability of systems.
Description
Technical field
The present invention relates to a kind of synchronous operation device, particularly relate to a kind of synchronous operation device that makes the Frequency Synchronization of self-vibration and converter and reduction voltage circuit.
Background technology
LCD (Liquid Crystal Display, LCD) use has increased trend, and the traditional CRT monitor of replacement gradually, have do not take up space, the innate advantage of low power consuming and low radiation, making becomes the set main display system of Modern Family and public place.And the most frequently used fluorescent tube (Fluorescent Lamp of present stage, being called for short FL) how driving circuit is with the Royer circuit conversion structure that doctor Royer was invented, and its primary structure is that the buck-converter (Buck Converter) of a DC-DC and the direct current of a self-vibration formula are delivered the stream device.The DC-DC buck-converter of leading portion (Buck Converter) is for making a simple voltage transitions, by the change-over switch in its structure of control, the direct supply of input end can be converted to the square-wave signal of variable-width, it also is called pulse wave width modulation technology (Pulse Width Modulation, PWM), and by the energy storage of inductor in the circuit structure with release and to act on, being converted to than input terminal voltage with the square-wave signal with this variable-width is low electric signal, and the self-vibration formula direct current that is input to the back utmost point is delivered stream transformer (inverter).
Seeing also shown in Figure 5ly, is the circuit block diagram of existing known a kind of two plate voltage conversion device.This two plate voltage conversion device 500 among Fig. 5 comprises AC 502, fluorescent tube 504, lamp current circuit for detecting 514, back coupling compensation control circuit 516, pulse width modulation circuit 518, frequency generating circuit 508 and reduction voltage circuit 512.It couples and closes is that AC 502 is electrically coupled to reduction voltage circuit 512, power supply and fluorescent tube 504, lamp current circuit for detecting 514 is electrically coupled to fluorescent tube 504 and feedbacks compensation control circuit 516, and pulse width modulation circuit 518 is electrically coupled to frequency generating circuit 508 and reduction voltage circuit 512.
The manner of execution of this two plate voltage conversion device 500 be for the low pressure in the AC 502 change high pressure step-up transformer, be parallel to the transformer primary side resonating capacitor, be series at the obstruct electric capacity (Ballast capacitor) of Circuit Fault on Secondary Transformer high-pressure side and two and recommend the switch driven device each other, and by another auxiliary winding of transformer, be used as two trigger signals of recommending the driving switch device each other, to reach self-vibration.And fluorescent tube 504 also operates under this natural frequency of vibration.Lamp current circuit for detecting 514 is to flow through for detecting to seek the electric current of light modulation pipe 504, to export a detection signal.516 of back coupling compensation control circuits are exported one according to detection signal and are feedback signal to pulse width modulation circuit 518.In addition, 508 of frequency generating circuits produce a fixed frequency to pulse width modulation circuit 518.
In the prior art, pulse width modulation circuit 518 is exported a controlling signal to reduction voltage circuit 512 according to received fixed frequency and back coupling signal.Reduction voltage circuit 512 is then operated the frequency of controlling signal.
Because it has the operating system of two-stage type, therefore then can be different in the design of operating frequency.Its meaning reduction voltage circuit 512 has its oneself operating frequency, and AC 502 also operates in the natural frequency of vibration that self-vibration produced of oneself.
Seeing also shown in Figure 6ly, is the voltage ripple phenomenon synoptic diagram on the fluorescent tube of existing known a kind of two plate voltage conversion device.Wherein, because asynchronous on reduction voltage circuit 512 and AC 502 frequencies, it will cause the problem on the difference frequency and cause exporting on fluorescent tube 504 voltage ripple phenomenon.
Comprehensive the above, owing to the asynchronous voltage ripple phenomenon that produces on AC 502 and reduction voltage circuit 512 frequencies, this high-tension ripple phenomenon, cause the scintillation of fluorescent tube 504 and the instability of lamp current back coupling control sometimes, and cause the instability in the design.
This shows that above-mentioned existing synchronous operation device obviously still has inconvenience and defective, and demands urgently further being improved in structure and use.In order to solve the problem that above-mentioned synchronous operation device exists, relevant manufacturer there's no one who doesn't or isn't seeks solution painstakingly, but do not see always that for a long time suitable design finished by development, and common product does not have appropriate structure to address the above problem, and this obviously is the problem that the anxious desire of relevant dealer solves.
Because the defective that above-mentioned existing synchronous operation device exists, the inventor is based on being engaged in this type of product design manufacturing abundant for many years practical experience and professional knowledge, and the utilization of cooperation scientific principle, actively studied innovation, in the hope of founding a kind of synchronous operation device of new structure, can improve general existing synchronous operation device, make it have more practicality.Through constantly research, design, and after studying sample and improvement repeatedly, create the present invention who has practical value finally.
Summary of the invention
Fundamental purpose of the present invention is, overcome the defective that existing synchronous operation device exists, and provide a kind of synchronous operation device of new structure, technical matters to be solved is that its default sampling spot from the collector terminal of the collector terminal of the first transistor of self-vibration converter or transistor seconds is taken a sample, so that the frequency of reduction voltage circuit and self-vibration change-over circuit can be synchronous, thereby be suitable for practicality more.
Another object of the present invention is to, a kind of synchronous operation device is provided, technical matters to be solved is that it is taken a sample from the default sampling spot between self-vibration converter and reduction voltage circuit, so that the frequency of reduction voltage circuit and self-vibration change-over circuit can be synchronous, thereby is suitable for practicality more.
The object of the invention to solve the technical problems is to adopt following technical scheme to realize.According to a kind of synchronous operation device that the present invention proposes, it comprises: a fluorescent tube; One self-vibration change-over circuit, be electrically coupled to a power supply and this fluorescent tube, provide to this fluorescent tube after conversion in order to electric energy that this power supply is provided, and this self-vibration change-over circuit operates in a natural frequency of vibration, wherein said self-vibration change-over circuit comprises a first transistor and a transistor seconds; One sampling and frequency generating circuit is electrically coupled to this self-vibration change-over circuit, and this natural frequency of vibration is done sampling and calculating, in order to export a synchronizing frequency; One detecting and feedback loop is electrically coupled to this fluorescent tube, in order to flow through this lamp tube current and do and feedback computing of detecting, feedbacks signal to export one; One modulation circuit is electrically coupled to this detecting and feedback loop, this sampling and frequency generating circuit and this self-vibration change-over circuit, and receives and calculate this back coupling signal and this synchronizing frequency, in order to output and the synchronous controlling signal of this natural frequency of vibration; And a reduction voltage circuit, be electrically coupled to this modulation circuit, this self-vibration converter and this power supply.
The object of the invention to solve the technical problems also can be applied to the following technical measures to achieve further.
Aforesaid synchronous operation device, wherein said sampling and frequency generating circuit are that the default sampling spot in this self-vibration change-over circuit is taken a sample.
Aforesaid synchronous operation device, wherein said default sampling spot is the collector terminal that is positioned at this first transistor.
Aforesaid synchronous operation device, wherein said default sampling spot is the collector terminal that is positioned at this transistor seconds.
Aforesaid synchronous operation device, wherein said sampling and frequency generating circuit comprise: a sample circuit is electrically coupled to this self-vibration change-over circuit, in order to this natural frequency of vibration is taken a sample; And a frequency generating circuit, be electrically coupled to this sample circuit and this modulation circuit, in order to this natural frequency of vibration is made this synchronizing frequency of output after the computing.
Aforesaid synchronous operation device, wherein said detecting and feedback loop, it comprises: a circuit for detecting, be electrically coupled to this fluorescent tube, detect this lamp tube current of flowing through, in order to export a detection signal; And one feedback compensating circuit, is electrically coupled to this circuit for detecting and this modulation circuit, in order to this detection signal is done computing, to export this back coupling signal.
Aforesaid synchronous operation device, wherein said reduction voltage circuit are to be the DC-DC reduction voltage circuit.
Aforesaid synchronous operation device, wherein said self-vibration change-over circuit is to be AC/DC converter.
Aforesaid synchronous operation device, the relation of the wherein said natural frequency of vibration and this synchronizing frequency comprise with frequency, frequency multiplication, frequency tripling and high frequency multiplication one of them.
The object of the invention to solve the technical problems also adopts following technical scheme to realize.According to a kind of synchronous operation device that the present invention proposes, it comprises a fluorescent tube; One self-vibration change-over circuit is electrically coupled to a power supply and this fluorescent tube, provide to this fluorescent tube after conversion in order to electric energy that this power supply is provided, and this self-vibration change-over circuit operates in a natural frequency of vibration, and wherein said self-vibration change-over circuit comprises a first transistor; One reduction voltage circuit is electrically coupled to this modulation circuit, this self-vibration converter and this power supply; One sampling and frequency generating circuit is electrically coupled to the default sampling spot of one between this self-vibration change-over circuit and this reduction voltage circuit, in order to after this natural frequency of vibration being done sampling and being calculated, exports a synchronizing frequency; One detecting and feedback loop is electrically coupled to this fluorescent tube, in order to flow through this lamp tube current and do and feedback computing of detecting, feedbacks signal to export one; And a modulation circuit, be electrically coupled to this detecting and feedback loop, this sampling and frequency generating circuit and this reduction voltage circuit, and receive and calculate this backs coupling signal and this synchronizing frequency, in order to export and the synchronous controlling signal of this natural frequency of vibration.
The object of the invention to solve the technical problems also can be applied to the following technical measures to achieve further.
Aforesaid synchronous operation device, wherein said sampling and frequency generating circuit comprise: a sample circuit is electrically coupled to this self-vibration change-over circuit, in order to this natural frequency of vibration is taken a sample; And a frequency generating circuit, be electrically coupled to this sample circuit and this modulation circuit, in order to this natural frequency of vibration is made this synchronizing frequency of output after the computing.
Aforesaid synchronous operation device, wherein said detecting and feedback loop, it comprises: a circuit for detecting, be electrically coupled to this fluorescent tube, detect this lamp tube current of flowing through, in order to export a detection signal; And one feedback compensating circuit, is electrically coupled to this circuit for detecting and this modulation circuit, in order to this detection signal is done computing, to export this back coupling signal.
Aforesaid synchronous operation device, wherein said reduction voltage circuit are to be the DC-DC reduction voltage circuit.
Aforesaid synchronous operation device, wherein said this self-vibration change-over circuit is to be AC/DC converter.
Aforesaid synchronous operation device, the relation of the wherein said natural frequency of vibration and this synchronizing frequency comprise with frequency, frequency multiplication, frequency tripling and high frequency multiplication one of them.
The present invention compared with prior art has tangible advantage and beneficial effect.By above technical scheme as can be known, in order to reach aforementioned goal of the invention, major technique of the present invention thes contents are as follows:
The present invention proposes a kind of synchronous operation device, and this synchronous operation device comprises: fluorescent tube, self-vibration change-over circuit, sampling and frequency generating circuit, detecting and feedback loop and modulation circuit.Above-mentioned self-vibration change-over circuit is electrically coupled to power supply and fluorescent tube, and the electric energy of being responsible for power supply is provided provides to fluorescent tube after conversion, and the self-vibration change-over circuit operates in the natural frequency of vibration.Above-mentioned sampling and frequency generating circuit are electrically coupled to the self-vibration change-over circuit, are responsible for the natural frequency of vibration is done sampling and calculating, with the output synchronizing frequency.Above-mentioned detecting and feedback loop are electrically coupled to fluorescent tube, and flow through lamp tube current and do to feedback computing of responsible detecting is with the reset signal.Above-mentioned modulation circuit is electrically coupled to detecting and feedback loop, sampling and frequency generating circuit and self-vibration change-over circuit, is responsible for receiving and calculating back coupling signal and synchronizing frequency, with output and the synchronous controlling signal of the natural frequency of vibration.
Described according to preferred embodiment of the present invention, above-mentioned sampling and frequency generating circuit are that the default sampling spot in the self-vibration change-over circuit is taken a sample.Wherein default sampling spot is to be positioned at the collector terminal of the first transistor of self-vibration change-over circuit or the collector terminal of transistor seconds.
Described according to preferred embodiment of the present invention, the above-mentioned natural frequency of vibration and the relation of synchronizing frequency comprise with frequency, frequency multiplication, frequency tripling or high frequency multiplication.
The present invention also proposes a kind of synchronous operation device, and this synchronous operation device comprises: fluorescent tube, self-vibration change-over circuit, reduction voltage circuit, sampling and frequency generating circuit, detecting and feedback loop and modulation circuit.Above-mentioned self-vibration change-over circuit is electrically coupled to power supply and this fluorescent tube, and the electric energy of being responsible for power supply is provided provides to fluorescent tube after conversion, and the self-vibration change-over circuit operates in a natural frequency of vibration.Above-mentioned reduction voltage circuit is electrically coupled to modulation circuit, self-vibration converter and power supply.Above-mentioned sampling and frequency generating circuit are electrically coupled to the default sampling spot of one between self-vibration change-over circuit and reduction voltage circuit, are responsible for exporting a synchronizing frequency after the natural frequency of vibration being done sampling and being calculated.Above-mentioned detecting and feedback loop are electrically coupled to fluorescent tube, and flow through lamp tube current and do to feedback computing of responsible detecting is with the reset signal.Above-mentioned modulation circuit is electrically coupled to detecting and feedback loop, sampling and frequency generating circuit and reduction voltage circuit, is responsible for receiving and calculating back coupling signal and synchronizing frequency, with output and the synchronous controlling signal of the natural frequency of vibration.
Described according to preferred embodiment of the present invention, the above-mentioned natural frequency of vibration and the relation of synchronizing frequency comprise with frequency, frequency multiplication, frequency tripling or high frequency multiplication.
The present invention takes a sample in the pulsating direct current of the primary side of self-vibration change-over circuit because of employing, therefore has the synchronous function of operating frequency that reaches fluorescent tube operating frequency and reduction voltage circuit, can improve the existing known high-tension ripple phenomenon of transformer output terminal, and can increase the degree of stability of system and have the advantage that circuit design is simplified.
Via as can be known above-mentioned, the invention relates to a kind of synchronous operation device, it comprises: fluorescent tube, self-vibration change-over circuit, sampling and frequency generating circuit, detecting and feedback loop and modulation circuit and reduction voltage circuit.This synchronous operation device is that the default sampling spot in the self-vibration change-over circuit or the default sampling spot of self-vibration change-over circuit and reduction voltage circuit are taken a sample to the natural frequency of vibration, so that the controlling signal of modulation circuit output can be synchronous with the natural frequency of vibration, and then can improve the ripple phenomenon of output HIGH voltage, and can increase the degree of stability of system.
By technique scheme, synchronous operation device of the present invention has following advantage at least:
1, in the synchronous operation device of the present invention, when the Frequency Synchronization of reduction voltage circuit and self-vibration change-over circuit, can reduce by a Frequency point in the interference.
2, synchronous operation device of the present invention, by the frequency of reduction voltage circuit and self-vibration change-over circuit synchronously, can improve the ripple phenomenon of output HIGH voltage, and can increase the degree of stability of system.
3, in the synchronous operation device of the present invention, the decision of system frequency sync signal is determined by transformer and the formed resonance trough of resonant capacitor.
4, synchronous operation device of the present invention expansion is improved in the loop that lights a lamp of traditional fluorescent tube, so its circuit structure is quite simple.
In sum, the synchronous operation device of special construction of the present invention, its default sampling spot from the collector terminal of the collector terminal of the first transistor of self-vibration converter or transistor seconds is taken a sample, and can make the frequency of its reduction voltage circuit and self-vibration change-over circuit can be synchronous; In addition, it is taken a sample from the default sampling spot between self-vibration converter and reduction voltage circuit, can make the frequency of reduction voltage circuit and self-vibration change-over circuit can be synchronous.It has above-mentioned many advantages and practical value, and in like product, do not see have similar structural design to publish or use and really genus innovation, no matter it structurally or bigger improvement all arranged on the function, have large improvement technically, and produced handy and practical effect, and more existing synchronous operation device has the multinomial effect of enhancement, thus be suitable for practicality more, and have the extensive value of industry, really be a new and innovative, progressive, practical new design.
Above-mentioned explanation only is the general introduction of technical solution of the present invention, for can clearer understanding technological means of the present invention, and can be implemented according to the content of instructions, below with preferred embodiment of the present invention and conjunction with figs. describe in detail as after.
Description of drawings
Fig. 1 is the circuit block diagram according to a kind of synchronous operation device of a preferred embodiment of the present invention.
Fig. 2 is the signal sequential chart according to the natural frequency of vibration and the synchronizing frequency of a kind of synchronous operation device of a preferred embodiment of the present invention.
Fig. 3 is the practical circuit diagram according to the synchronous operation device of a kind of single fluorescent tube of a preferred embodiment of the present invention.
Fig. 4 A is the practical circuit diagram according to the synchronous operation device of another single fluorescent tube of a preferred embodiment of the present invention.
Fig. 4 B is the practical circuit diagram according to the synchronous operation device of a kind of pair of fluorescent tube of a preferred embodiment of the present invention.
Fig. 5 is the circuit block diagram that has known a kind of two plate voltage conversion device now.
Fig. 6 is the voltage ripple phenomenon synoptic diagram on the fluorescent tube of existing known a kind of two plate voltage conversion device.
100,300,400,410: synchronous operation device 102: the self-vibration change-over circuit
104,104a, 104b: fluorescent tube 106: sampling and frequency generating circuit
108: detecting and feedback loop 110: reduction voltage circuit
112: sample circuit 114: frequency generating circuit
116: circuit for detecting 118: the back coupling compensating circuit
120: modulation circuit 122: the first transistor
124: transistor seconds 160,162,164: default sampling spot
170: transformer 172: resonating capacitor
202: natural frequency of vibration waveform 204: the controlling signal waveform
330,332: sampling spot circuit 348: intercept electric capacity
500: two plate voltage conversion device 502: straight reaching/a-c transducer
504: fluorescent tube 508: frequency generating circuit
512: reduction voltage circuit 514: the lamp current circuit for detecting
516: back coupling compensation control circuit 518: pulse width modulation circuit
Embodiment
Reach technological means and the effect that predetermined goal of the invention is taked for further setting forth the present invention, below in conjunction with accompanying drawing and preferred embodiment, to its embodiment of synchronous operation device, structure, feature and the effect thereof that foundation the present invention proposes, describe in detail as after.
Seeing also shown in Figure 1ly, is the circuit block diagram according to a kind of synchronous operation device of a preferred embodiment of the present invention.This synchronous operation device 100 comprises: fluorescent tube 104, self-vibration change-over circuit 102, sampling and frequency generating circuit 106, detecting and feedback loop 108 and modulation circuit 120 and reduction voltage circuit 110.Wherein, as be familiar with this skill person and can know easily, self-vibration change-over circuit 102 can for example be an AC/DC converter, to provide fluorescent tube 104 AC power.In addition, fluorescent tube 104 can for example be to use the fluorescent tube (Fluorescent Lamp is called for short FL) in LCD, but all not as limit.
In the present embodiment, self-vibration change-over circuit 102 is for being electrically coupled to power supply and fluorescent tube 104, and self-vibration change-over circuit 102 operates in a natural frequency of vibration.Wherein, as be familiar with this skill person and can know easily, this natural frequency of vibration is produced by transformer 170 and resonant capacitor 172 formed resonance troughs, but not as limit.
In the present embodiment, this sampling and frequency generating circuit 106 are electrically coupled to self-vibration change-over circuit 102, and comprise the sample circuit 112 that is used for the natural frequency of vibration is done sampling and be electrically coupled to sample circuit 112 and modulation circuit 120, be used for the natural frequency of vibration is done the frequency generating circuit 114 of output one synchronizing frequency after the computing.
In the present embodiment, detecting and feedback loop 108 comprise circuit for detecting 116 and feedback compensating circuit 118.Wherein, circuit for detecting 116 is electrically coupled to fluorescent tube 104, and detects the electric current of the fluorescent tube 104 of flowing through, to export a detection signal.Feedbacking compensating circuit 118 is electrically coupled to circuit for detecting 116 and modulation circuit 120, and detection signal is done computing, with the reset signal to modulation circuit 120.Wherein, circuit for detecting 116 can for example be the lamp current circuit for detecting, but not as limit.
In the present embodiment, modulation circuit 120 is electrically coupled to back coupling compensating circuit 118, frequency generating circuit 114 and reduction voltage circuit 110, receive to feedback signal and synchronizing frequency, and calculate with synchronizing frequency feedbacking signal, with export and a controlling signal that the natural frequency of vibration is synchronous to reduction voltage circuit 110.Wherein, as be familiar with this skill person and can know easily, modulation circuit 120 can be pulse width modulation circuit (PulseWidth Modulation is called for short PWM), but not as limit.
In preferred embodiment of the present invention, reduction voltage circuit 110 can for example be the buck-converter (Buck Converter) of DC-DC, but not as limit.
In the present embodiment, sample circuit 112 is to take a sample from self-vibration change-over circuit 102 interior default sampling spots 160,162.Wherein, this default sampling spot 160 can for example be to be positioned at the collector terminal of the first transistor 122 or the collector terminal of transistor seconds 124, but all not as limit.
Please continue to consult shown in Figure 1, in the present embodiment, default sampling spot 164 can also for example be to be positioned at 102 of reduction voltage circuit 120 and self-vibration change-over circuits, different with above-mentioned explanation is that sample circuit 106 is for being electrically coupled to 102 of reduction voltage circuit 120 and self-vibration change-over circuits when the default sampling spot between reduction voltage circuit 120 and self-vibration change-over circuit 102 164 is done sampling.
In preferred embodiment of the present invention, the pulsating direct current of the primary side of self-vibration change-over circuit 102 is taken a sample.
Please continue to consult shown in Figure 1, the manner of execution of this synchronous operation device 100 is to receive the DC voltage that power supply transmits for self-vibration change-over circuit 102, export fluorescent tube 104 to after being converted into alternating voltage then, and transformer 170 and resonant capacitor 172 formed resonance troughs can produce a natural frequency of vibration, and self-vibration change-over circuit 102 promptly operates under this natural frequency of vibration with fluorescent tube 104.
Then, sample circuit 106 can one of them be taken a sample to the natural frequency of vibration from default sampling spot 160,162,164, and exports frequency generating circuit 114 to.114 of frequency generating circuits are done computing to the natural frequency of vibration, and export a synchronizing frequency to modulation circuit 120.
In addition, the electric current that 116 of circuit for detecting detecting fluorescent tube 104 is flow through, and export a detection signal to feedbacking compensating circuit 118 is then feedback 118 of compensating circuits and is feedback signal to modulation circuit 120 according to this detection signal output one.
In the present embodiment, modulation circuit 120 receives this and feedbacks signal synchronizing frequency therewith, and it is done computing, and the synchronous controlling signal of output and the natural frequency of vibration is to reduction voltage circuit 110 then.Please consulting shown in Figure 2ly simultaneously, is according to the natural frequency of vibration of a kind of synchronous operation device of a preferred embodiment of the present invention and the signal sequential chart of synchronizing frequency.
In Fig. 2, waveform 202 is for outputing to the natural frequency of vibration of fluorescent tube 104, and 204 of waveforms are the waveform of the controlling signal of modulation circuit 120 outputs.The self-vibration signal 202 that wherein outputs to fluorescent tube is the operation signal of fluorescent tube 104.Therefore, can know by the waveform 202,204 of Fig. 2, the output on the modulation circuit 120 (controlling signal) with the synchronous function of the natural frequency of vibration of self-vibration formula change-over circuit 102.So the operation on can be the mode of operation of frequency multiplication synchronously.
Seeing also shown in Figure 3ly, is the practical circuit diagram according to the synchronous operation device of a kind of single fluorescent tube of a preferred embodiment of the present invention.At Fig. 3 is for the side circuit that corresponds to Fig. 1 designs, but certainly ought be not as limit.In Fig. 3, self-vibration change-over circuit 102 more comprises obstruct electric capacity, and it is to be series at transformer 170 secondary side high-pressure sides (secondary is surveyed and also is the left and right sides that low pressure is changeed the transformer 170 of high pressure).Wherein, the first transistor 122 is to recommend the switch driven device each other for two with transistor seconds 124.
In the present embodiment, the default sampling spot 164 of Fig. 3 is for 110 of self-vibration change-over circuit 102 and reduction voltage circuits.And the synchronous operation device 300 of Fig. 3 also comprises a sampling spot circuit 330.Circuit design from Fig. 3, sample circuit 112 is modes of utilizing edge-triggered for for example being as can be seen, but not as limit.
Seeing also shown in Fig. 4 A, is the practical circuit diagram according to the synchronous operation device of another single fluorescent tube of a preferred embodiment of the present invention.Difference is that default sampling spot 162 is within self-vibration change-over circuit 102 among itself and Fig. 3.In addition, the most different parts with Fig. 3 of Fig. 4 A are that the sample circuit 112 of Fig. 4 A is the frequency multiplier circuits that utilize edge-triggered, and adopt the reason of frequency multiplier circuit be for default sampling spot 160 or 162 frequencies of being taken a sample be half for the frequency of sample circuit 112 samplings of Fig. 3.Therefore, sample circuit 112 promptly utilizes the frequency multiplier circuit of edge-triggered in Fig. 4 A, so that the controlling signal of modulation circuit 120 outputs can be synchronous with the natural frequency of vibration.
Please then consulting shown in Fig. 4 B, is the practical circuit diagram according to the synchronous operation device of a kind of pair of fluorescent tube of a preferred embodiment of the present invention.The difference of Fig. 4 B and Fig. 4 A is that the synchronous operation device 410 among Fig. 4 has comprised fluorescent tube 104a and 104b, obtaining of the signal of synchronous operation device is identical with Fig. 4 A, but connected mode difference for transformer 170 secondary sides, two output terminals of its transformer 170 all connect fluorescent tube 104a and 104b individually, to form the link circuit of fluorescent tube series connection.As be familiar with this skill person and can know easily, synchronous operation device of the present invention can for example be to be applied on the LCD of many fluorescent tubes, but certainly ought be not as limit.
In preferred embodiment of the present invention, the frequency of self-vibration formula change-over circuit 102 AC signal and the frequency of reduction voltage circuit 110 are synchronized relation, and it can be identical, frequency multiplication, frequency tripling or high frequency multiplication.
In preferred embodiment of the present invention, this reduction voltage circuit 110, self-vibration change-over circuit 102, fluorescent tube 104, circuit for detecting 116, back coupling compensating circuit 118 and modulation circuit 120 are the lamp current control system that constitute the closed loop.
In preferred embodiment of the present invention, the synchronizing frequency of frequency generating circuit 114 outputs can the change thereupon along with the change of the natural frequency of vibration.
The above, it only is preferred embodiment of the present invention, be not that the present invention is done any pro forma restriction, though the present invention discloses as above with preferred embodiment, yet be not in order to limit the present invention, any those skilled in the art, in not breaking away from the technical solution of the present invention 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 solution of the present invention, according to technical spirit of the present invention to any simple modification that above embodiment did, equivalent variations and modification all still belong in the scope of technical solution of the present invention.
Claims (15)
1. synchronous operation device is characterized in that it comprises:
One fluorescent tube;
One self-vibration change-over circuit, be electrically coupled to a power supply and this fluorescent tube, provide to this fluorescent tube after conversion in order to electric energy that this power supply is provided, and this self-vibration change-over circuit operates in a natural frequency of vibration, wherein said self-vibration change-over circuit comprises a first transistor and a transistor seconds;
One sampling and frequency generating circuit is electrically coupled to this self-vibration change-over circuit, and this natural frequency of vibration is done sampling and calculating, in order to export a synchronizing frequency;
One detecting and feedback loop is electrically coupled to this fluorescent tube, in order to flow through this lamp tube current and do and feedback computing of detecting, feedbacks signal to export one;
One modulation circuit is electrically coupled to this detecting and feedback loop, this sampling and frequency generating circuit and this self-vibration change-over circuit, and receives and calculate this back coupling signal and this synchronizing frequency, in order to output and the synchronous controlling signal of this natural frequency of vibration; And
One reduction voltage circuit is electrically coupled to this modulation circuit, this self-vibration change-over circuit and this power supply.
2. synchronous operation device according to claim 1 is characterized in that wherein said sampling and frequency generating circuit are that a default sampling spot in this self-vibration change-over circuit is taken a sample.
3. synchronous operation device according to claim 2 is characterized in that wherein said default sampling spot is the collector terminal that is positioned at this first transistor.
4. synchronous operation device according to claim 2 is characterized in that wherein said default sampling spot is the collector terminal that is positioned at this transistor seconds.
5. synchronous operation device according to claim 1 is characterized in that wherein said sampling and frequency generating circuit comprise:
One sample circuit is electrically coupled to this self-vibration change-over circuit, in order to this natural frequency of vibration is taken a sample; And
One frequency generating circuit is electrically coupled to this sample circuit and this modulation circuit, in order to this natural frequency of vibration is done export this synchronizing frequency after the computing.
6. synchronous operation device according to claim 1 is characterized in that wherein said detecting and feedback loop comprise:
One circuit for detecting is electrically coupled to this fluorescent tube, with detecting this lamp tube current of flowing through, in order to export a detection signal; And
One back coupling compensating circuit is electrically coupled to this circuit for detecting and this modulation circuit, in order to this detection signal is done computing, to export this back coupling signal.
7. synchronous operation device according to claim 1 is characterized in that wherein said reduction voltage circuit is to be the DC-DC reduction voltage circuit.
8. synchronous operation device according to claim 1 is characterized in that wherein said self-vibration change-over circuit is to be AC/DC converter.
9. synchronous operation device according to claim 1, the relation that it is characterized in that the wherein said natural frequency of vibration and this synchronizing frequency comprise with frequently, frequency multiplication and high frequency multiplication one of them.
10. synchronous operation device is characterized in that it comprises:
One fluorescent tube;
One self-vibration change-over circuit is electrically coupled to a power supply and this fluorescent tube, provide to this fluorescent tube after conversion in order to electric energy that this power supply is provided, and this self-vibration change-over circuit operates in a natural frequency of vibration, and wherein said self-vibration change-over circuit comprises a first transistor;
One sampling and frequency generating circuit is electrically coupled to the default sampling spot of one between this self-vibration change-over circuit and this reduction voltage circuit, in order to after this natural frequency of vibration being done sampling and being calculated, exports a synchronizing frequency;
One detecting and feedback loop is electrically coupled to this fluorescent tube, in order to flow through this lamp tube current and do and feedback computing of detecting, feedbacks signal to export one;
One modulation circuit is electrically coupled to this detecting and feedback loop, this sampling and frequency generating circuit and this reduction voltage circuit, and receives and calculate this back coupling signal and this synchronizing frequency, in order to output and the synchronous controlling signal of this natural frequency of vibration; And
One reduction voltage circuit is electrically coupled to this modulation circuit, this self-vibration change-over circuit and this power supply.
11. synchronous operation device according to claim 10 is characterized in that wherein said sampling and frequency generating circuit comprise:
One sample circuit is electrically coupled to this self-vibration change-over circuit, in order to this natural frequency of vibration is taken a sample; And
One frequency generating circuit is electrically coupled to this sample circuit and this modulation circuit, in order to this natural frequency of vibration is done export this synchronizing frequency after the computing.
12. synchronous operation device according to claim 10 is characterized in that wherein said detecting and feedback loop comprise:
One circuit for detecting is electrically coupled to this fluorescent tube, detects this lamp tube current of flowing through, in order to export a detection signal; And
One back coupling compensating circuit is electrically coupled to this circuit for detecting and this modulation circuit, in order to this detection signal is done computing, to export this back coupling signal.
13. synchronous operation device according to claim 10 is characterized in that wherein said reduction voltage circuit is to be the DC-DC reduction voltage circuit.
14. synchronous operation device according to claim 10 is characterized in that wherein said this self-vibration change-over circuit is to be AC/DC converter.
15. synchronous operation device according to claim 10, the relation that it is characterized in that the wherein said natural frequency of vibration and this synchronizing frequency comprise with frequently, frequency multiplication and high frequency multiplication one of them.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100382110A CN100397198C (en) | 2004-05-13 | 2004-05-13 | Synchronous operation set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100382110A CN100397198C (en) | 2004-05-13 | 2004-05-13 | Synchronous operation set |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1696799A CN1696799A (en) | 2005-11-16 |
| CN100397198C true CN100397198C (en) | 2008-06-25 |
Family
ID=35349576
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100382110A Expired - Fee Related CN100397198C (en) | 2004-05-13 | 2004-05-13 | Synchronous operation set |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100397198C (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5705879A (en) * | 1994-01-27 | 1998-01-06 | Hitachi Metals, Ltd. | Discharge tube driving device and piezoelectric transformer therefor |
| US6087787A (en) * | 1998-11-23 | 2000-07-11 | Linear Technology Corporation | Fluorescent-lamp excitation circuit with frequency and amplitude control and methods for using same |
| JP2004071192A (en) * | 2002-08-02 | 2004-03-04 | Asahi Matsushita Electric Works Ltd | Fluorescent lamp lighting device |
-
2004
- 2004-05-13 CN CNB2004100382110A patent/CN100397198C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5705879A (en) * | 1994-01-27 | 1998-01-06 | Hitachi Metals, Ltd. | Discharge tube driving device and piezoelectric transformer therefor |
| US6087787A (en) * | 1998-11-23 | 2000-07-11 | Linear Technology Corporation | Fluorescent-lamp excitation circuit with frequency and amplitude control and methods for using same |
| JP2004071192A (en) * | 2002-08-02 | 2004-03-04 | Asahi Matsushita Electric Works Ltd | Fluorescent lamp lighting device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1696799A (en) | 2005-11-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1992493B (en) | Resonance DC/DC converter and control method thereof | |
| TW400685B (en) | Current synchronous zero voltage switching resonant topology | |
| Redl et al. | A new high-frequency and high-efficiency electronic ballast for HID lamps: Topology, analysis, design, and experimental results | |
| CN102497711B (en) | LED drive circuit and comprise the Switching Power Supply of this drive circuit | |
| CN1953631A (en) | A DC/AC power supply device for the backlight application of cold-cathode fluorescent lamp | |
| CN109245593A (en) | Control circuit and method suitable for two-way DC converter | |
| CN209930163U (en) | High-precision numerical control power supply | |
| CN102792776A (en) | Power interface for a power supply circuit | |
| CN101442865A (en) | Discharge lamp lighting apparatus | |
| CN101312330A (en) | High voltage power source of resonant transformer | |
| CN101685980A (en) | Full-bridge zero-voltage boost switching resonant converter based on LLC used for UPS | |
| CN102762019B (en) | HID electronic ballasting circuit, electronic ballast and HID lamp | |
| CN104079179A (en) | Resonant converter and direct-current power supply | |
| US7466567B2 (en) | Half-bridge CCFL driving apparatus | |
| CN101789701B (en) | Soft switching power converter | |
| TWI448205B (en) | Single stage electronic ballast with power factor correction | |
| US20110095611A1 (en) | Uninterruptible power supply supporting active loads | |
| JP5457204B2 (en) | Full bridge composite resonance type DC-DC converter | |
| CN100397198C (en) | Synchronous operation set | |
| CN103152958B (en) | HID (high-intensity-discharge) lamp high-frequency driving circuit | |
| WO2019019297A1 (en) | Direct-current ups device, system, and control method | |
| TWI418253B (en) | A novel single-stage high-power-factor square-wave electronic ballast | |
| CN101753040A (en) | Power adaptor | |
| CN100502214C (en) | Modified type full-bridge phase-shifted soft switch converter | |
| JP2004527896A (en) | High efficiency high power factor electronic ballast |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080625 |