CN102316652A - Lamp driver - Google Patents
Lamp driver Download PDFInfo
- Publication number
- CN102316652A CN102316652A CN201110058752XA CN201110058752A CN102316652A CN 102316652 A CN102316652 A CN 102316652A CN 201110058752X A CN201110058752X A CN 201110058752XA CN 201110058752 A CN201110058752 A CN 201110058752A CN 102316652 A CN102316652 A CN 102316652A
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- CN
- China
- Prior art keywords
- circuit block
- circuit
- lamp
- operating state
- time interval
- 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.)
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
- H05B41/14—Circuit arrangements
- H05B41/26—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc
- H05B41/28—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters
- H05B41/288—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters with semiconductor devices and specially adapted for lamps without preheating electrodes, e.g. for high-intensity discharge lamps, high-pressure mercury or sodium lamps or low-pressure sodium lamps
- H05B41/292—Arrangements for protecting lamps or circuits against abnormal operating conditions
- H05B41/2921—Arrangements for protecting lamps or circuits against abnormal operating conditions for protecting the circuit against abnormal operating conditions
- H05B41/2925—Arrangements for protecting lamps or circuits against abnormal operating conditions for protecting the circuit against abnormal operating conditions against abnormal lamp operating conditions
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
- H05B41/14—Circuit arrangements
- H05B41/36—Controlling
- H05B41/38—Controlling the intensity of light
- H05B41/382—Controlling the intensity of light during the transitional start-up phase
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
Abstract
The present invention provides a kind of lamp driver of the HID of being used for lamp, and it is equipped with input terminal, is used to be connected to power supply; Circuit block I, it is couple to said input terminal, is used to light the HID lamp and is used for basis generate lamp current by the supply power voltage that said power supply provides, and be equipped with the lamp splicing ear; Circuit block II, it is couple to circuit block I, is used to generate the signal S1 of indication lamp voltage magnitude; Circuit block III, it is couple to circuit block II, is used for after the time interval, generating stop signal S2, and the said time interval is confirmed by the amplitude of signal S1; Halt circuit, it is couple to circuit block I and circuit block III, is used for the work of halt circuit parts I under the influence of said stop signal S2; Active circuit again, it is couple to circuit block I, is used for after a predetermined time interval active circuit parts I again.Said lamp and lamp driver are protected to exempt from the infringement that excessive temperature causes thus.
Description
Technical field
The present invention relates to a kind of lamp driver of the HID of being used for lamp, said lamp driver is equipped with:
-be used to be connected to the input terminal of power supply,
-being couple to the circuit block I of said input terminal, the supply power voltage that is used to light said lamp and is used for basis provided by said power supply generates a lamp current, and is equipped with the lamp splicing ear.
Background technology
In the work of HID lamp, there are a plurality of different stages.At first be ignition phase, during ignition phase, provide a high voltage to light said lamp to lamp.
Next stage after the ignition phase is " continuing " stage, at " continuing " discharge stability in the said lamp during the stage.After stage, said lamp is in " climbing " stage " continuing ", " climbing " during the stage composition of said lamp heating and plasma take place.When lamp reached the steady operation condition, its entering was called as the stage of " steady operation ".Except these stages that said lamp gets into subsequently, under the situation of operate as normal, said lamp still possibly get into an abnormal stage, for example " end-of-life (the EOL) " stage.In this " end-of-life " stage, lamp is seriously consumed so that no longer possibly keep operate as normal.All working is in the stage in (except " steady operation " and " climbing " the stage) mentioned in the above, and the average voltage at said lamp two ends is higher than the average voltage in " steady operation " stage.If this high voltage is kept long time, said lamp or lamp driver possibly be damaged or become Tai Re and cause unsafe condition.
Summary of the invention
The objective of the invention is to prevent unsafe condition at each working stage of HID lamp.
According to the present invention, be equipped with at first section lamp driver that is used for the HID lamp of mentioning:
-be couple to the circuit block II of said circuit block I, be used to generate the signal S1 of indication lamp voltage magnitude;
-be couple to the circuit block III of said circuit block II, be used for after a time interval t1, generating a stop signal S2, said time interval t1 is confirmed by the amplitude of said signal S1;
-be couple to the halt circuit of said circuit block I and circuit block III, be used under the influence of said stop signal S2, stopping the work of said circuit block I;
-be couple to the active circuit again of said circuit block I, be used for after a predetermined time interval t2, activating again said circuit block I.
At the duration of work of lamp, circuit block II generates the signal S1 of indication lamp voltage magnitude.Circuit block III generates a stop signal after time interval t1, said time interval t1 is confirmed by the lamp voltage amplitude that signal S1 representes.Usually, the amplitude of modulating voltage is more little, and time interval t1 is big more, and vice versa.Said time interval t1 is selected to before the circuit of lamp driver or said lamp are damaged or unsafe condition occurs, generate said stop signal.Said halt circuit stops the work of said circuit block I under the influence of said stop signal S2.Usually expectation activates said circuit block I once more and attempts obtaining stable work.Yet the activation again of circuit block I is carried out after can not being stopped in the work of circuit block I immediately, because said lamp and driver thereof all still are heat, should only after a predetermined time interval, activate said circuit block I again.In lamp driver according to the present invention, said active circuit more only activates said circuit block I again after a predetermined time interval t2.Certainly, the duration of said predetermined time interval t2 be selected so that said lamp and circuit can be enough cooling.The duration of for example said predetermined time interval t2 can confirm according to the amplitude of said signal S1 before being stopped at circuit block I, but also can be selected as one with the irrelevant steady state value of the amplitude of signal S1.
Halt circuit can be realized with a kind of cheap and effective and efficient manner; It comprises a circuit block IV; Said circuit block IV can be operated in first and second operating states; Keep said circuit block I not work if said circuit block IV is in the said halt circuit of second operating state, keep said circuit block I in running order if said circuit block IV is in first operating state.
Preferably, said circuit block IV changes to second operating state through said stop signal S2 from first operating state, and comes to be reset to first operating state from second operating state through the supply power voltage of the said circuit block IV of temporary transient reduction.
In this case; Said active circuit again preferably includes a circuit; Be used for when said circuit block IV is in second operating state, reducing the supply power voltage of said circuit block IV, and be used for when a time delay that equals said predetermined time interval t2 finishes, recovering said supply power voltage and just changing to second operating state since first operating state in said operating state.
Said circuit block IV preferably includes the part of an integrated circuit or an integrated circuit.
Description of drawings
With reference to accompanying drawing, with the embodiment that lamp driver of the present invention further is discussed.In the accompanying drawings,
Fig. 1 shows the embodiment according to lamp driver of the present invention;
Fig. 2 shows the relation of duration of amplitude and the said time interval t1 of signal S1.
Embodiment
In Fig. 1, K1 and K2 are the input terminal that is used to be connected to power supply.Diode D3, D5, D1 and D6; Capacitor C1, C4-C6, switch element M1 and M2, choke L1; Lamp splicing ear K3 and K4; And the drive circuit CC that generates the control signal that is used for switch element M1 and M2, form circuit block I together, to be used to lighting said lamp and to be used for generating lamp current according to the supply power voltage that provides by said power supply.
Resistor R 3 and R4, capacitor C2, and diode D1 and D2 form circuit block II together, it is couple to circuit block I to be used to generate the signal S1 of indication lamp voltage magnitude.Resistor R 5; Capacitor C3; The reference voltage source Vref of comparator C OMP and generation reference voltage V1 forms circuit block III together, and it is couple to circuit block II to be used for after a time interval t1, generating a stop signal S2, and said time interval t1 is confirmed by the amplitude of signal S1.The output of said comparator C OMP is connected to the input of drive circuit CC.The part of said drive circuit forms halt circuit, be used for shown in stop the work of said circuit block I under the influence of stop signal S2.Said halt circuit also comprises circuit block IV; It can be operated in first and second operating states, and ifs circuit parts IV is in the then said halt circuit of second operating state and keeps the said circuit block I ifs circuit parts IV that do not work to be in first operating state and then to keep said circuit block I in running order.
Circuit block Vsup is used to generate a supply power voltage.The first terminal ground connection of circuit block Vsup.Second terminal of circuit block Vsup is connected to the positive terminal of capacitor C6.
The input terminal of circuit block RC is couple to the lead-out terminal of drive circuit CC, and said lead-out terminal is also connected to the control electrode of switch element M2.The lead-out terminal of circuit block RC is couple to the input terminal of circuit block Vsup.The supply power voltage input terminal of drive circuit CC is connected to the lead-out terminal of circuit block Vsup.Circuit block RC forms active circuit again, to be used for after a predetermined time interval t2 active circuit parts I again.
The job description of lamp driver shown in Figure 1 is following.As input terminal K1, when K2 was connected to power supply, drive circuit CC made switch element M1 and M2 alternately conducting and not conducting, and high frequency voltage appears in the two ends that are thus connected the said lamp between the lamp splicing ear.This voltage at lamp two ends generates an electric current flow through resistor R 3 and capacitor C2.The positive current of this electric current partly flows through diode D2 and resistor R 4, and negative current partly flows through diode D1.Thus, for a positive voltage pulse is provided on the resistor R 4, its amplitude depends on the amplitude of said modulating voltage.These positive voltage pulses are capacitor C3 charging.Under the lower situation of lamp voltage amplitude, be exactly under the situation during the steady operation, the voltage on the capacitor C3 can not reach the magnitude of voltage V1 that reference voltage source Vref generates.Thus, the output signal of comparator C OMP can not change to height from low, and this makes halt circuit can not be energized and the work of circuit block I can not be stopped.Yet if said modulating voltage is enough high, the voltage on the resistor R 4 is charged to a value higher than magnitude of voltage V1 with capacitor C3, and halt circuit can be energized so that the work of circuit block I is stopped.The excitation of halt circuit is under the influence of stop signal S2, to change to second operating state from its first operating state through circuit block IV to realize.In the embodiment shown in fig. 1, because drive circuit CC does not generate the control signal that is used for switch element M1 and M2 when said circuit block IV is in its second operating state, the work of circuit block I is stopped.
Note that the voltage on the resistor R 4 will increase when the voltage at said lamp two ends increases, thus capacitor C3 be charged to the duration of magnitude of voltage V1 will be shorter.In other words, before being energized of halt circuit, higher modulating voltage appears at during the shorter duration.Fig. 2 shows this effect.Trunnion axis along Fig. 2 shows modulating voltage with arbitrary unit, shows the time along vertical axis with arbitrary unit.Said curve shows the amplitude of modulating voltage and the relation between the duration, and said duration is the duration that said modulating voltage existed before halt circuit was energized.Can find out that when modulating voltage increased, this duration shortened.For the low voltage value (steady operation) of modulating voltage, the said duration is an endless, and halt circuit can not be energized in other words.Modulating voltage is high more, and the part of said lamp and lamp driver will overheat or be damaged quickly.Duration and selected relation modulating voltage between of halt circuit before being energized guaranteed: for each value of lamp voltage amplitude, can both before lamp or lamp driver are damaged, stop said lamp driver.The igniting of lamp, continue and end-of-life during, higher modulating voltage appears.
When halt circuit is energized and the work of lamp when being stopped, this is sensed by circuit block RC, because the control signal that at this moment is not used in than low switch element M2 appears at its input.Thus, it is low that circuit block RC makes that the signal of its output drops to from height, and the supply power voltage that makes circuit block Vsup generate is lowered.Influenced by it, the voltage of the supply power voltage input of drive circuit CC and thus the supply power voltage of circuit block IV also be lowered.After a predetermined time interval t2, the signal of circuit block RC output is raised to height from low, and the supply power voltage that makes circuit block Vsup generate returns to its normal value.Thus, circuit block IV is reset to first operating state, thereby and drive circuit CC be provided with suitable supply power voltage and begin a new lamp work sequence, said work sequence is with the igniting beginning and be that lamp provides a lamp current subsequently.
Halt circuit and again the subsequent action of active circuit make the two ends of lamp during time interval t1, have higher modulating voltage, the work of halt circuit stopping light then, and the work that at interval recovers lamp after the t2 at the fixed time.This sequence is called as intermittent operation.Said predetermined time interval t2 for example carries out timing through the built-in digital timer of circuit block RC, and when the work that circuit block RC senses lamp is stopped, picks up counting.Replacedly, said this timing can certainly be accomplished through resistor-capacitor combination or other any known way.
If for example said lamp loss of ignition, during the time interval t1 that is confirmed by modulating voltage, ignition voltage is present in the two ends of lamp; After interbody spacer t1, the work of lamp driver is interrupted predetermined time interval t2 (said in this embodiment predetermined time interval and modulating voltage are irrelevant).When predetermined time interval t2 finished, ignition voltage offered lamp once more, or the like.Certainly, if lamp igniting success and modulating voltage reduced before said time interval t1 finishes, said halt circuit can not be energized and the work of lamp will continue.
Do not have successful connection perhaps to be under the situation in end-of-life stage at said lamp, carry out similar intermittent operation yet.
In the end-of-life stage, the interior discharge tube of lamp leaks.The gas of discharge tube is positioned at outside bulb shell now in this means.This is easy in outside bulb shell, realize igniting.When the outside bulb shell igniting had caused a lasting outside bulb shell to discharge, problem had just occurred.Situation about when the temperature of interior Support Level has surpassed a high value, having come to this.This will take place when driver is carried excessive power to outside bulb shell.For fear of this high-energy, as long as one get into the EOL stage, said halt circuit just will be introduced discontinuous mode (operating time is definite by the modulating voltage in EOL stage, and dwell time is fixed) with active circuit again.Following item will take place:
EOL is easy to cause the puncture in the outside bulb shell.Yet, not continuing owing in outside bulb shell, do not exist, typical root mean square (rms) voltage will be very high.Since modulating voltage will stop above 130V is said-active circuit will be triggered again.In a practical application of lamp driver shown in Figure 1, the time interval t1 that is confirmed by modulating voltage is 5 seconds, stops after being operated in 5 seconds shown in therefore.
Because driver will reset automatically behind time interval t2, therefore discontinuous mode will appear, and wherein said time interval t2 practical application hereto is 7 seconds (jobed 5 seconds, and stopped 7 seconds).Said discontinuous mode is not enough length, thereby allows to continue the perhaps thermionic emission of Support Level.This means in the outside bulb shell and can not have strong discharge.
Will there be injection or the transport mechanism of the metal parts of a said lamp to the outside bulb shell wall.This mechanism is triggered by discontinuous mode.The consequently metallization of outside bulb shell.This big metal surface is with beginning to serve as getter and collecting the gas (for example argon gas) in the outside bulb shell.
Having improved ignition voltage through the argon gas amount in the air-breathing minimizing outside bulb shell also finally causes any breakdown events not taking place.
The EOL that the outside bulb shell breakdown events has guaranteed the safety of system does not take place.Bulb will can not suffer outside bulb shell discharge or incandescent mode.
Claims (6)
1. lamp driver that is used for the HID lamp, it is equipped with
Input terminal is used to be connected to power supply;
Circuit block I, it is couple to said input terminal, is used to light the HID lamp and is used for basis generate lamp current by the supply power voltage that said power supply provides, and be equipped with the lamp splicing ear;
Circuit block II, it is couple to circuit block I, is used to generate the signal S1 of indication lamp voltage magnitude;
Circuit block III, it is couple to circuit block II, is used for after time interval t1, generating stop signal S2, and said time interval t1 is confirmed by the amplitude of signal S1;
Halt circuit, it is couple to circuit block I and circuit block III, is used for the work of halt circuit parts I under the influence of said stop signal S2;
Active circuit again, it is couple to circuit block I, is used for after a predetermined time interval t2 active circuit parts I again.
2. according to the lamp driver of claim 1, wherein, said time interval t1 reduced when the modulating voltage of representing as signal S1 raise.
3. according to the lamp driver of claim 1 or 2; Wherein said halt circuit comprises a circuit block IV; It is operated in first and second operating states; I does not work if said circuit block IV is in the said halt circuit holding circuit of second operating state parts, keeps said circuit block I in running order if said circuit block IV is in first operating state.
4. according to the lamp driver of claim 3; Wherein, The operating state of said circuit block IV changes to second operating state through said stop signal S2 from first operating state, and can be reset to first operating state from second operating state through the said circuit block IV of the supply power voltage of the said circuit block IV of temporary transient reduction.
5. according to the lamp driver of claim 4; Wherein said active circuit again comprises a circuit; Be used for when said circuit block IV is in second operating state, reducing the supply power voltage of said circuit block IV; And be used for when a time delay that equals said predetermined time interval t2 finishes, recovering said supply power voltage, and said operating state when first operating state changes to second operating state just.
6. according to the lamp driver of claim 3,4 or 5, wherein said circuit block IV comprises the part of an integrated circuit or an integrated circuit.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP10168870.3 | 2010-07-08 | ||
| EP10168870 | 2010-07-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102316652A true CN102316652A (en) | 2012-01-11 |
Family
ID=44628747
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110058752XA Pending CN102316652A (en) | 2010-07-08 | 2011-03-11 | Lamp driver |
| CN2011200633256U Expired - Fee Related CN202276534U (en) | 2010-07-08 | 2011-03-11 | Lamp driver |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200633256U Expired - Fee Related CN202276534U (en) | 2010-07-08 | 2011-03-11 | Lamp driver |
Country Status (2)
| Country | Link |
|---|---|
| CN (2) | CN102316652A (en) |
| WO (1) | WO2012004695A1 (en) |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5051665A (en) * | 1990-06-21 | 1991-09-24 | Gte Products Corporation | Fast warm-up ballast for arc discharge lamp |
| US6359396B1 (en) * | 2000-04-28 | 2002-03-19 | Philips Electronics North America Corporation | Multiple-parameter control of lamp ignition |
| WO2002056645A2 (en) * | 2001-01-12 | 2002-07-18 | Matsushita Electric Works Ltd | Ballast for a discharge lamp |
| JP3835534B2 (en) * | 2001-03-02 | 2006-10-18 | 東芝ライテック株式会社 | High-intensity discharge lamp lighting device and lighting device |
| JP4569067B2 (en) * | 2002-05-29 | 2010-10-27 | 東芝ライテック株式会社 | High pressure discharge lamp lighting device and lighting device |
| US20050029955A1 (en) * | 2003-08-07 | 2005-02-10 | Blake Frederick H. | Anti-cycling control system for luminaires |
| US7109659B2 (en) * | 2004-11-19 | 2006-09-19 | Matsushita Electric Works, Ltd. | High-intensity discharge lamp ballast and method for operating high-intensity discharge lamp |
| EP1854341A2 (en) * | 2005-03-04 | 2007-11-14 | International Rectifier Corporation | Automotive high intensity discharge lamp ballast circuit |
| US7982411B2 (en) * | 2006-02-06 | 2011-07-19 | Metrolight Ltd. | Ignition and operation of electronic high intensity discharge lamps |
-
2011
- 2011-03-11 CN CN201110058752XA patent/CN102316652A/en active Pending
- 2011-03-11 CN CN2011200633256U patent/CN202276534U/en not_active Expired - Fee Related
- 2011-06-20 WO PCT/IB2011/052669 patent/WO2012004695A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| WO2012004695A1 (en) | 2012-01-12 |
| CN202276534U (en) | 2012-06-13 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120111 |
|
| WD01 | Invention patent application deemed withdrawn after publication |