CN201138887Y - Driving apparatus of multiple strip lamp - Google Patents
Driving apparatus of multiple strip lamp Download PDFInfo
- Publication number
- CN201138887Y CN201138887Y CNU2008200013069U CN200820001306U CN201138887Y CN 201138887 Y CN201138887 Y CN 201138887Y CN U2008200013069 U CNU2008200013069 U CN U2008200013069U CN 200820001306 U CN200820001306 U CN 200820001306U CN 201138887 Y CN201138887 Y CN 201138887Y
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- divider resistance
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Abstract
The utility model discloses a multi-lamp drive device that is used for driving at least two cold-cathode fluorescent lamps, CCFL. The drive device comprises a control module, and a power driving and switching module; the control module transmits the driving signals so as to drive the CCFL through the power driving and switching module; the low-voltage end of each CCFL is connected with the ground through a sampling resistance; at least the low-voltage end of one CCFL is connected with a first divider resistance; the low-voltage ends of other CCFL are at least connected with an open-circuit protecting diode; the first divider resistance and the open-circuit protecting diode are both connected with the control module through a rectifier diode; a second divider resistance and a second filtering capacitance are connected between the rectifier diode and the ground, between the connecting end of the control module and the ground; and the values of the first divider resistance and the second divider resistance are greatly larger than the value of the sampling resistance. When the CCFL works normally, the open-circuit protecting diode blocks reversely; when one path of the CCFL is opened, the open-circuit protecting diode is conducted forwardly.
Description
Technical field
The utility model relates to multi-light tube driving device.
Background technology
Lcd technology such as LCD and LCD TV is used increasingly extensive, as the backlight of LCDs important component part, has adopted the technology of many CCFL (cold-cathode fluorescence lamp, Cold CathodeFluorescent Lamp) mostly.CCFL needs higher starting resistor that it is lighted usually, needs to reduce the voltage to normal working voltage after the startup to guarantee its operate as normal, realizes the process of this voltage transformation usually by multi-light tube driving device.
Fig. 1 is the circuit theory diagrams of the multi-light tube driving device of a kind of many CCFL; as shown in the figure, multi-light tube driving device generally includes control module, is connected in power drive and modular converter between control module and the CCFL high-pressure side, is connected in Voltage Feedback module between control module and power drive and the modular converter, is connected in current feedback module and open-circuit-protection module between control module and the CCFL low-pressure end.Need higher some modulating voltage when CCFL starts, guarantee that CCFL can normally light.Because low excessively some modulating voltage can not light CCFL, too high some modulating voltage is harmful to CCFL, so control module is according to the input of Voltage Feedback module, and power controlling drives and the output of modular converter, guarantees that a modulating voltage is in a reasonable range.In addition, after the CCFL startup was finished, CCFL was generally operational in a constant electric current, and at this moment control module is according to the input of current feedback module, and the output of power controlling driving and modular converter makes lamp be operated in a constant current state.Because the operating voltage of CCFL is than higher, CCFL is open circuit in a single day, and power drive and modular converter will be exported a very high voltage, and this is very dangerous and harmful, so need protect by the open-circuit-protection module usually.
In the multi-light tube driving device of the prior art, there are a plurality of CCFL usually.Fig. 2, Fig. 3 are the circuit theory diagrams of the multi-light tube driving device of CCFL lamp more than two kinds, and Fig. 2 illustrates the circuit theory diagrams based on the current feedback of operational amplifier and open-circuit-protection module, the open-circuit-protection of the corresponding lamp of each operational amplifier.When lamp is opened a way, the operational amplifier output LOW voltage, triode Q1 ends, and the Q1 output HIGH voltage makes field effect transistor Q2 conducting, thereby makes the feedback voltage of current feedback of control module very low, realizes open-circuit-protection.But the current feedback of this multi-light tube driving device and open-circuit-protection modular circuit complex structure, cost is higher.Fig. 3 shows based on the current feedback of field effect transistor and open-circuit-protection module principle figure; each field effect transistor adopts series model; when certain lamp open circuit; corresponding field effect transistor is ended among Q1～Qn; output HIGH voltage; make field effect transistor Q conducting; thereby make the feedback voltage of current feedback terminal of control module very low; realize open-circuit-protection; but the current feedback of this multi-light tube driving device and open-circuit-protection modular circuit structure more complicated; cost is higher, and the lamp number of open-circuit-protection cannot be too many.
The utility model content
The utility model provides a kind of multi-light tube driving device, can reduce the complexity of current feedback and open-circuit-protection modular circuit, saves cost.
The utility model discloses a kind of multi-light tube driving device, this device is used for driving at least two cold-cathode fluorescence lamp CCFL, described multi-light tube driving device comprises: control module and power drive and modular converter, wherein said control module output drive signal drives described CCFL by described power drive and modular converter, and described current feedback and open-circuit-protection module feed back to described control module with the signal of telecommunication of described CCFL; Be connected with sampling resistor between each described CCFL low-pressure end and the ground, among the described CCFL wherein one tunnel low-pressure end be connected with first divider resistance at least, the low-pressure end on other roads of described CCFL is connected with the open-circuit-protection diode at least, described first divider resistance and described open-circuit-protection diode link to each other with described control module by rectifier diode jointly, be connected to second divider resistance and second filter capacitor between the link of described rectifier diode and described control module and the ground, the resistance of described first, second divider resistance is far longer than the resistance of described sampling resistor; When described CCFL operate as normal, described open-circuit-protection diode reverse is ended, when any one road open circuit of described CCFL, and the conducting of described open-circuit-protection diode forward.
Wherein, described CCFL wherein one tunnel low-pressure end also be connected with the open-circuit-protection diode in parallel with described first divider resistance.
Further, the low-pressure end on other roads of described CCFL can also be connected with first divider resistance in parallel with described open-circuit-protection diode.
In addition, described rectifier diode number can be greater than one, and each rectifier diode is connected successively.
Wherein, described power drive and modular converter comprise at least two outputs, and each output is connected with the high-pressure side of each CCFL lamp respectively.
The utility model also provides a kind of multi-light tube driving device, comprise at least two cold-cathode fluorescence lamp CCFL, control module, power drive and modular converter and Voltage Feedback module, described power drive and modular converter comprise and possess the transformer that the secondary output of even number is arranged, the corresponding one tunnel described CCFL of per two secondary outputs in the secondary output of the even number of described transformer, the a pair of different name end of described per two secondary outputs is connected with the two ends of the CCFL of described correspondence respectively, another of described per two secondary outputs to the different name end respectively the two ends of the CCFL by a pair of voltage sample unit in the described Voltage Feedback module and described correspondence be connected; Described control module output drive signal drives described CCFL by described power drive and modular converter, and described Voltage Feedback module and current feedback and open-circuit-protection module feed back to described control module with the signal of telecommunication of described CCFL;
Be connected with sampling resistor between at least one voltage sample unit and the ground in the described a pair of voltage sample unit, the common connection end of described wherein a pair of voltage sample unit and described sampling resistor is connected with first divider resistance at least, other common connection end to voltage sample unit and described sampling resistor is connected with the open-circuit-protection diode at least, described first divider resistance and described open-circuit-protection diode link to each other with described control module by rectifier diode jointly, be connected to second divider resistance and second filter capacitor between the link of described rectifier diode and described control module and the ground, described first, the resistance of second divider resistance is far longer than the resistance of described sampling resistor; When described CCFL operate as normal, described open-circuit-protection diode reverse is ended, when any one road open circuit of described CCFL, and the conducting of described open-circuit-protection diode forward.
The low-pressure end of described wherein a pair of voltage sample unit also is connected with and described first divider resistance rectifier diode in parallel.
Further, other low-pressure end to the voltage sample unit that is different from described wherein a pair of voltage sample unit also is connected with first divider resistance in parallel with described open-circuit-protection diode.
In addition, the number of described rectifier diode can be greater than one, and each rectifier diode is connected in series successively.
The utility model is simplified the current feedback of multi-light tube driving device and the circuit structure of open-circuit-protection module, the circuit simple and stable of current feedback and open-circuit-protection module, and, dwindle the space of pcb board effectively because the simplification of circuit provides cost savings.In addition, circuit adjustment is more convenient, only need suitably regulate second divider resistance, just can obtain required output current easily, and applicable to the current feedback and the open-circuit-protection of the CCFL lamp of arbitrary number.
Description of drawings
Fig. 1 is the theory diagram of multi-light tube driving device in the prior art;
Fig. 2 is the circuit diagram of a kind of multi-light tube driving device in the prior art;
Fig. 3 is the circuit diagram of another kind of multi-light tube driving device in the prior art;
Fig. 4 is the circuit theory diagrams of the multi-light tube driving device of first embodiment;
Fig. 5 is the circuit theory diagrams of the multi-light tube driving device of second embodiment;
Fig. 6 is the circuit theory diagrams of the multi-light tube driving device of the 3rd embodiment;
Fig. 7 is the circuit theory diagrams of the multi-light tube driving device of the 4th embodiment;
Fig. 8 is the circuit theory diagrams of the multi-light tube driving device of the 5th embodiment.
Embodiment
First embodiment: Fig. 4 is the circuit theory diagrams of multi-light tube driving device among the embodiment of the present utility model.As shown in the figure, LCDs comprises several CCFL lamps, in the drawings respectively with CCFL1, CCFL2 ... CCFLn sign, power drive and modular converter comprise a plurality of outputs, high-pressure side with each CCFL lamp links to each other respectively, be connected with current feedback and open-circuit-protection module between the low-pressure end of CCFL lamp and the control module, this current feedback and open-circuit-protection module can comprise several sampling resistors RA1, RA2...RAn; Open-circuit-protection diode D1, D2...Dn; The first divider resistance RB1, RB2...RBn; The second divider resistance Ris; And devices such as rectifier diode D, the second filter capacitor Cis.The control module output drive signal drives CCFL by power drive and modular converter, and current feedback and open-circuit-protection module feed back to described control module with the signal of telecommunication of described CCFL.
Sampling resistor RA1～RAn is connected between the low-pressure end and ground of corresponding C CFL1～CCFLn lamp, and for example, RA1 is connected between the low-pressure end and ground of CCFL1; Open-circuit-protection diode D1～Dn is connected to the low-pressure end of CCFL1～CCFLn lamp and receives between the anode of rectifier diode of control module, the negative electrode of each open-circuit-protection diode is connected with the low-pressure end of each CCFL lamp, and the contact of the open-circuit-protection diode anode of each branch road links to each other with the anode of the rectifier diode of receiving control module; In the present embodiment, be parallel with corresponding first divider resistance RB1～RBn respectively at open-circuit-protection diode D1～Dn two ends; The anode of rectifier diode D links to each other with the contact of the anode of each open-circuit-protection diode, and negative electrode links to each other with control module; The second filter capacitor Cis and two contacts after the second divider resistance Ris is in parallel be connected respectively to the negative electrode of rectifier diode D; The resistance of first, second divider resistance is much larger than described sampling resistor.
When CCFL lamp operate as normal; open-circuit-protection diode D1～Dn ends; the electric current that flows through CCFL1～CCFLn is through sampling resistor RA1～RAn sampling; and through the first divider resistance RB1～RBn and the second divider resistance Ris dividing potential drop; after the rectifier diode D rectification and the second filter capacitor Cis filtering; provide current feedback signal to arrive control module, control module transmits control signal to power drive and modular converter according to current feedback signal, thus the electric current of control CCFL lamp.When a street lamp wherein (for example; the k road) when open circuit taking place; the open-circuit-protection diode Dk conducting of this branch road; usually since the first divider resistance RB1～RBn and the second divider resistance Ris much larger than sampling resistor RA1～RAn; therefore, the dividing potential drop that this moment, process RB1～RBn and open lamp CCFLk pairing open-circuit-protection diode Dk and sampling resistor RAk were obtained is very little, thereby makes the voltage of Ris very little; therefore the current feedback input voltage of control module is very low, thereby realizes defencive function.
Second embodiment: as shown in Figure 5, this embodiment shows the circuit theory illustrated example of power drive and modular converter, as shown in the figure, power drive and modular converter comprise several power drive and conversion submodule, finish driving and translation function to power by transformer T1～Tn in power drive and the conversion submodule.The contact of the input of power drive and conversion submodule is connected the high-pressure side of the termination CCFL1～CCFLn lamp of the secondary coil of transformer T1～Tn with control module.Current feedback and circuit structure and the operation principle of having opened protection module can not repeat them here with reference to the related content of first embodiment.
The 3rd embodiment: as shown in Figure 6, this embodiment shows the circuit theory diagrams of another kind of multi-light tube driving device, and this embodiment has done further simplification to current feedback and open-circuit-protection module on first embodiment and the open basis of second embodiment.As shown in the figure; different with preceding two embodiment is; first divider resistance in the present embodiment only comprises that RB1 is parallel to open-circuit-protection diode D1 both sides, and current feedback and the circuit structure of having opened protection module can not repeat them here with reference to the related content of first, second embodiment.
When CCFL lamp operate as normal; open-circuit-protection diode D1～Dn ends; the electric current that flows through CCFL1～CCFLn is through sampling resistor RA1～RAn sampling; and through the first divider resistance RB1 and the second divider resistance Ris dividing potential drop; after the rectifier diode D rectification and the second filter capacitor Cis filtering; provide current feedback signal to arrive control module, control module transmits control signal to power drive and modular converter according to current feedback signal, thus the electric current of control CCFL lamp.When open circuit took place CCFL1, therefore open-circuit-protection diode D1～Dn did not produce feedback current by still being in cut-off state, thereby realizes defencive function; When other a certain street lamps (for example; the k road) when open circuit taking place; the open-circuit-protection diode Dk conducting of this branch road; usually since the first divider resistance RB1 and the second divider resistance Ris much larger than sampling resistor RAk; therefore, the dividing potential drop that this moment, process open lamp CCFLk pairing open-circuit-protection diode Dk and sampling resistor RAk were obtained is very little, thereby makes the voltage of Ris very little; therefore the current feedback input voltage of control module is very low, thereby realizes defencive function.
The 4th embodiment: this embodiment has done further simplification to current feedback and open-circuit-protection module on the disclosed basis of the 3rd embodiment; the low-pressure end of CCFL1 in the present embodiment is connected with the first divider resistance RB1; omit open-circuit-protection diode D1; current feedback and circuit structure and the operation principle of having opened protection module can not repeat them here with reference to the related content of the 3rd embodiment.
By above-mentioned first to fourth embodiment as seen, first divider resistance on the low-pressure end of wherein one road CCFL lamp in the utility model, the first divider resistance two ends can be parallel with the open-circuit-protection diode, also can not have open-circuit-protection diode in parallel; At least be connected with the open-circuit-protection diode between the low-pressure end of the CCFL lamp in other roads and the control module, and open-circuit-protection diode two ends can be parallel with first divider resistance, also can not have first divider resistance.In addition, rectifier diode D can be the series connection of one or more diodes, and to increase the antijamming capability of circuit, above embodiment is an example with a rectifier diode D only.
The 5th embodiment: as shown in Figure 7, different with the foregoing description, the power drive in the present embodiment and the transformer of modular converter comprise possessing the transformer that the secondary output of even number is arranged, as the T1～Tn among the figure, and corresponding one road CCFL of per two secondary outputs in the secondary output of the even number of transformer; The a pair of different name end of per two secondary outputs is connected with the two ends of the CCFL of correspondence respectively, another of per two secondary outputs to the different name end respectively the two ends of the CCFL by a pair of voltage sample unit in the Voltage Feedback module and correspondence be connected; The control module output drive signal drives CCFL by power drive and modular converter, and Voltage Feedback module and current feedback and open-circuit-protection module feed back to described control module with the signal of telecommunication of described CCFL.Each is to being connected with sampling resistor RA1～RAn between power supply sampling unit in the voltage sample unit and the ground, consider the interference of transformer, sampling resistor RA1～RAn is in parallel respectively first filter capacitor CA1～CAn, an end that is the every group of sampling resistor and first filter capacitor is connected with first cold end of the secondary output of each transformer, the other end is connected simultaneously with second cold end and the ground of the secondary output of each transformer, first potential end can be the positive phase end, can be the minus phase end also, but need all pairing sampling resistors of CCFL lamp all to connect according to identical connected mode with filter capacitor.In addition, a kind of circuit structure diagram of Voltage Feedback module has been shown in the present embodiment, the Voltage Feedback module comprises several voltage sample unit, be connected to the two ends of each secondary output of transformer, and the cold end of voltage sample unit linked the current sample end, for example, sampling resistor RA1 is connected with an end that the CCFL1 lamp is carried out two voltage sample unit of voltage sample respectively with two contacts of filter capacitor CA1.In addition, rectifier diode D can be the series connection of one or more diodes, increasing the antijamming capability of circuit, is example with a rectifier diode D among Fig. 7.The circuit structure of current feedback and open-circuit-protection module can be with reference to the related content of previous embodiment; first divider resistance in current feedback and the open-circuit-protection module is connected in the common connection end of wherein a pair of voltage sample unit and described sampling resistor; open-circuit-protection diode in current feedback and the open-circuit-protection module is connected in other common connection end to voltage sample unit and described sampling resistor, and first divider resistance and described open-circuit-protection diode link to each other with described control module by rectifier diode jointly.
When CCFL lamp operate as normal; open-circuit-protection diode D1～Dn ends; the electric current that flows through CCFL1～CCFLn is through sampling resistor RA1～RAn sampling; and through the first divider resistance RB1～RBn and the second divider resistance Ris dividing potential drop; after the rectifier diode D rectification and the second filter capacitor Cis filtering; provide current feedback signal to arrive control module, control module transmits control signal to power drive and modular converter according to current feedback signal, thus the electric current of control CCFL lamp.When a street lamp wherein (for example; the k road) when open circuit taking place; the open-circuit-protection diode Dk conducting of this street lamp; usually since the first divider resistance RBk and the second divider resistance Ris much larger than sampling resistor RAk; therefore, the dividing potential drop that this moment, process RBk and open lamp CCFLk pairing open-circuit-protection diode Dk and sampling resistor RAk were obtained is very little, thereby makes the voltage on the Ris very little; therefore the current feedback input voltage of control module is very low, thereby realizes defencive function.
The 6th embodiment: as shown in Figure 8, this embodiment has done further simplification to current feedback and open-circuit-protection module on the basis of the disclosed technical scheme of the 5th embodiment.First divider resistance in the present embodiment only comprises that RB1 is parallel to open-circuit-protection diode D1 both sides, and current feedback and the circuit structure of having opened protection module can not repeat them here with reference to the related content of the 5th embodiment.
When CCFL lamp operate as normal; open-circuit-protection diode D1～Dn ends; the electric current that flows through CCFL1～CCFLn is through sampling resistor RA1～RAn sampling; and through the first divider resistance RB1 and the second divider resistance Ris dividing potential drop; after rectifier diode D rectification and first filter capacitor CA1～CAn, the second filter capacitor Cis filtering; provide current feedback signal to arrive control module; control module transmits control signal to power drive and modular converter according to current feedback signal, thus the electric current of control CCFL lamp.When open circuit took place CCFL1, the sampled voltage of sampling resistor RA1 was zero, so the dividing potential drop of the RB1 and the second divider resistance Ris is zero, the feedback voltage of current feedback input is zero, thereby realizes defencive function; When other a certain street lamps (for example; the k road) when open circuit taking place; the open-circuit-protection diode Dk of this branch road is in conducting state; usually since the first divider resistance RB1 and the second divider resistance Ris much larger than sampling resistor RAk; therefore, the dividing potential drop that this moment, process open lamp CCFLk pairing open-circuit-protection diode Dk and sampling resistor RAk were obtained is very little, thereby makes the voltage on the Ris very little; therefore the current feedback input voltage of control module is very low, thereby realizes defencive function.
By embodiment five and embodiment six as can be seen, the common connection end of the utility model wherein a pair of voltage sample unit and sampling resistor is connected with first divider resistance at least, the first divider resistance two ends can be parallel with the open-circuit-protection diode, also can not have open-circuit-protection diode in parallel; Other common connection ends to voltage sample unit and sampling resistor are connected with the open-circuit-protection diode at least, and open-circuit-protection diode two ends can be parallel with first divider resistance, also can not have first divider resistance.
Above-described the utility model execution mode does not constitute the qualification to the utility model protection range.Any modification of within spirit of the present utility model and principle, being done, be equal to and replace and improvement etc., all should be included within the claim protection range of the present utility model.
Claims (9)
1, a kind of multi-light tube driving device, be used for driving at least two cold-cathode fluorescence lamp CCFL, described multi-light tube driving device comprises: control module and power drive and modular converter, and wherein said control module output drive signal drives described CCFL by described power drive and modular converter;
It is characterized in that:
Be connected with sampling resistor between each described CCFL low-pressure end and the ground, among the described CCFL wherein one tunnel low-pressure end be connected with first divider resistance at least, the low-pressure end on other roads of described CCFL is connected with the open-circuit-protection diode at least, described first divider resistance and described open-circuit-protection diode link to each other with described control module by rectifier diode jointly, be connected to second divider resistance and second filter capacitor between the link of described rectifier diode and described control module and the ground, the resistance of described first, second divider resistance is far longer than the resistance of described sampling resistor; When described CCFL operate as normal, described open-circuit-protection diode reverse is ended, when any one road open circuit of described CCFL, and the conducting of described open-circuit-protection diode forward.
2, multi-light tube driving device according to claim 1 is characterized in that, described CCFL wherein one tunnel low-pressure end also is connected with the open-circuit-protection diode in parallel with described first divider resistance.
3, multi-light tube driving device according to claim 1 and 2 is characterized in that, the low-pressure end on other roads of described CCFL also is connected with first divider resistance in parallel with described open-circuit-protection diode.
4, multi-light tube driving device according to claim 3 is characterized in that, described rectifier diode number is greater than one, and each rectifier diode is connected successively.
5, multi-light tube driving device according to claim 4 is characterized in that, described power drive and modular converter comprise at least two outputs, and each output is connected with the high-pressure side of each CCFL lamp respectively.
6, a kind of multi-light tube driving device, be used for driving at least two cold-cathode fluorescence lamp CCFL, described multi-light tube driving device comprises: control module, power drive and modular converter and Voltage Feedback module, described power drive and modular converter comprise and possess the transformer that the secondary output of even number is arranged, the corresponding one tunnel described CCFL of per two secondary outputs in the secondary output of the even number of described transformer, the a pair of different name end of described per two secondary outputs is connected with the two ends of the CCFL of described correspondence respectively, another of described per two secondary outputs to the different name end respectively the two ends of the CCFL by a pair of voltage sample unit in the described Voltage Feedback module and described correspondence be connected; Described control module output drive signal drives described CCFL by described power drive and modular converter, and described Voltage Feedback module feeds back to described control module with the signal of telecommunication of described CCFL;
It is characterized in that:
Be connected with sampling resistor between at least one voltage sample unit and the ground in the described a pair of voltage sample unit, the common connection end of described wherein a pair of voltage sample unit and described sampling resistor is connected with first divider resistance at least, other common connection end to voltage sample unit and described sampling resistor is connected with the open-circuit-protection diode at least, described first divider resistance and described open-circuit-protection diode link to each other with described control module by rectifier diode jointly, be connected to second divider resistance and second filter capacitor between the link of described rectifier diode and described control module and the ground, described first, the resistance of second divider resistance is far longer than the resistance of described sampling resistor; When described CCFL operate as normal, described open-circuit-protection diode reverse is ended, when any one road open circuit of described CCFL, and the conducting of described open-circuit-protection diode forward.
7, multi-light tube driving device according to claim 5 is characterized in that, the low-pressure end of described wherein a pair of voltage sample unit also is connected with and described first divider resistance rectifier diode in parallel.
According to claim 6 or 7 described multi-light tube driving devices, it is characterized in that 8, other low-pressure end to the voltage sample unit that is different from described wherein a pair of voltage sample unit also is connected with first divider resistance in parallel with described open-circuit-protection diode.
9, multi-light tube driving device according to claim 8 is characterized in that: the number of described rectifier diode is greater than one, and each rectifier diode is connected in series successively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200013069U CN201138887Y (en) | 2008-01-08 | 2008-01-08 | Driving apparatus of multiple strip lamp |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200013069U CN201138887Y (en) | 2008-01-08 | 2008-01-08 | Driving apparatus of multiple strip lamp |
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| CN201138887Y true CN201138887Y (en) | 2008-10-22 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103402297A (en) * | 2013-08-09 | 2013-11-20 | 广州龙之杰科技有限公司 | Pulse xenon lamp striking and pre-burning power supply system and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103402297A (en) * | 2013-08-09 | 2013-11-20 | 广州龙之杰科技有限公司 | Pulse xenon lamp striking and pre-burning power supply system and method |
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Granted publication date: 20081022 Termination date: 20100208 |