CN101828431A - Control for discharge lamp - Google Patents
Control for discharge lamp Download PDFInfo
- Publication number
- CN101828431A CN101828431A CN200880107966A CN200880107966A CN101828431A CN 101828431 A CN101828431 A CN 101828431A CN 200880107966 A CN200880107966 A CN 200880107966A CN 200880107966 A CN200880107966 A CN 200880107966A CN 101828431 A CN101828431 A CN 101828431A
- Authority
- CN
- China
- Prior art keywords
- discharge lamp
- pulse
- energy
- storage capacitor
- lamp
- 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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Classifications
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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
- H05B41/30—Circuit arrangements in which the lamp is fed by pulses, e.g. flash lamp
- H05B41/32—Circuit arrangements in which the lamp is fed by pulses, e.g. flash lamp for single flash operation
- H05B41/325—Circuit arrangements in which the lamp is fed by pulses, e.g. flash lamp for single flash operation by measuring the incident light
-
- 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
- H05B41/30—Circuit arrangements in which the lamp is fed by pulses, e.g. flash lamp
- H05B41/34—Circuit arrangements in which the lamp is fed by pulses, e.g. flash lamp to provide a sequence of flashes
Abstract
At least one electric discharge lamp capable of generating a broadband output pulse of a range of wavelengths in the visible spectrum, the output pulse having a predetermined time interval and a predetermined total electrical energy input for the pulse, has a drive circuit for delivering energy pulses to the electrical discharge lamp, as well as a sensor for sensing an optical output from the discharge lamp; and a control mechanism for operating the drive circuit in response to optical parameters detected by the sensor.
Description
Technical field
The present invention relates generally to the controller that is used for discharge lamp, and it is applicable to provides the broadband incoherent light source that is fit to medical treatment and cosmetic applications.
Background technology
Known ground, being used to provide the discharge lamp of the incoherent light source of this purpose to compare traditional laser technology has several advantages, comprises their low cost, and their produce and allow multi-purpose multi-wavelength and less fact of being strictly regulated control.
A kind of typical discharge lamp that is used for this medical treatment and cosmetic applications comprises the xenon arc photoflash lamp that is positioned at reflector, and the optics output that reflector is suitable for the lamp of autoflash in the future guides to therapentic part.Fig. 1 of accompanying drawing shows this lamp that comprises discharge tube 1, discharge tube 1 is installed in the reflector shell 2 with hole 3, suitable transparent light guide 4 is set above hole 3, and transparent light guide 4 is used to collect from the illuminating bundle of photoflash lamp reflection and direct projection and with light beam and is sent to therapentic part.
This photoflash lamp is typically driven by capacitor discharging circuit, and wherein required electric energy is stored in the electric capacity always, till the needs output optical pulse; Fig. 2 of accompanying drawing shows the ball bearing made using that is used for this photoflash lamp, and wherein discharge tube 1 triggers a transformer 5 and an energy storage capacitor 6f energize by one.When needs light was exported, electric energy was sent to photoflash lamp, therefore electric energy was converted into light output.In such discharge circuit, the electric current of the photoflash lamp of flowing through changes at impulse duration, and itself and capacitance discharges characteristic are proportional.Because output wavelength determined by the plasma temperature in the photoflash lamp, and plasma temperature is by Current Control, thus generate different luminous energy intensity in this variation of impulse duration electric current, and cause the change of output wavelength spectrum.
In order to guarantee that valuably output wavelength keeps constant, has proposed to attempt producing at the output impulse duration scheme of constant current.
U.S. Pat 6,888,319 to have proposed a kind of be the method for purpose to produce constant current during light pulse.This method provides a kind of drive circuit that is used for pulse flashing light, this circuit comprises that one passes through the transducer and a series controller of the energy of lamp, this adjuster can be controlled in the on/off switch between energy storage capacitor and the photoflash lamp, and switching frequency is by electric current in the observation circuit or energy decision.This method can provide the output of constant relatively electric current during whole current impulse, and is commonly referred to as at United States Patent (USP) 4,513, the flywheel circuit of describing in 360.
Though provide constant current impulse to have superiority, this method can not provide constant optics output, because light energy output depends on many external factor that electric current changes that do not show as.These factors comprise, but be not limited to, gas filling pressure, gas purity, working temperature, the photoflash lamp top layer is aging, and the photoflash lamp top layer applies (stimulating the menstrual flow often coated in order to improve the conductibility photoflash lamp) or the doping of photoflash lamp top layer (to top layer doping filter specific wavelengths optionally).Can change many above-mentioned parameters in use; For example, commonly, because pollutant causes the optics fluctuation, photoflash lamp output during use can reduce.These pollutants can cause optical property to go down, but may not can influence the electric current of the photoflash lamp of flowing through.
Summary of the invention
Therefore we developed a kind of system that exports and guarantee substantially constant output at impulse duration monitoring light.
Therefore the present invention provides a kind of system, comprises in combination:
At least one electron discharge lamp, it can produce incoherent output optical pulse in the wave-length coverage of visible spectrum, this light pulse have predetermined pulse interval and the predetermined total electric energy input of pulse and
One drive circuit is used to transmit a plurality of energy pulses to described electron discharge lamp, and this drive circuit comprises:
A) energy storage capacitor can be stored the electric energy that is input to this circuit;
B) charger is used for energy storage capacitor is charged repeatedly;
C) switch is used for the electric energy from the energy storage capacitor input is sent to discharge lamp; With
D) drive unit, be used for preset time at interval in opening and closing switch optionally so that allow to send a plurality of energy bags to discharge lamp, the duration of each bag is less than preset time at interval;
This combination further comprises:
One optical sensor is used to detect the light output from discharge lamp; With
One controller is used to handle drive unit, with response by sensor to the variation of light output.
The present invention further provides a kind of electron discharge lamp, it can produce broadband output pulse in the wave-length coverage of visible spectrum, and this output pulse has predetermined pulse interval and the predetermined total electric energy input of pulse; Connected have an one drive circuit, and this drive circuit is used to transmit energy pulse to the electron discharge lamp, and a transducer is used to detect the light output from discharge lamp; And a controlling organization, be used to handle drive circuit, with response by sensor to parameter.
The time interval of light pulse typically is 1～100 millisecond (for example 10～100 milliseconds), and independent energy bag typically clocklike the order of magnitude reduce, for example 5～25 microseconds the duration.
Preferably, this controller comprises processor unit, it is set is used for the light output of sensor is compared with the precalibrated value in being stored in memory.
Again preferably, this controlling organization comprises that one is used for the high-speed AD converter of each transducer output.
Preferably, a plurality of discharge lamps are used; This can obtain more uniform light output.A plurality of like this lamps typically are present in to these lamps to be provided in the reflector element of a photoconduction.
When adopting a plurality of discharge lamp, optimum system choosing ground comprises the device that is used for closing discharge lamp when detector shows that one of them lamp can not produce the output pulse.
The present invention further provides the method for the impulse radiation source of a kind of driving such as discharge lamp, this method comprises provides energy storage capacitor, so that can store the electric energy that need be sent to radiation source, optionally charge to energy storage capacitor, so that the form with a plurality of energy bags in the preset time interval is sent to radiation source with energy pulse, wherein detected from the light output of radiation source, and the energy from the energy storage capacitor to the radiation source transmits Be Controlled, with response by sensor to optical parametric.
Further, the invention provides a kind of methods of treatment of optics beauty treatment, it comprises provides the electric energy that is input to discharge lamp, so that produce the light output pulse at animal tissue, this discharge lamp is driven by above-described method.
Description of drawings
Now with reference to description of drawings preferred feature of the present invention, wherein:
Fig. 1 schematically shows combining of the typical reflector that uses and photoconduction in system according to the present invention;
Fig. 2 exports time dependent figure for showing in the conventional flash lamp system light;
Fig. 3 shows a kind of exemplary electrical circuit used according to the invention and optical feedback system; And
Fig. 4 shows the digitial controller that is suitable for the demonstration used in Fig. 3 system.
Embodiment
Referring to Fig. 3, power supply 11 has AC AC power 12, and (typically be 110V or 240V, AC50/60Hz), it is converted into direct current (DC) voltage.This dc voltage is used for the charging to energy storage capacitor C1, is undertaken for the voltage of capacitor C1 charging by the SET signal controlling of issuing power supply 11 from numerical control system 13.Capacitance voltage Vc is by numerical control system 13 monitorings; When Vc reaches, control system 13 powered-downs 11.During recharging here, semiconductor switch 14 and 15 is at " shut " mode", suppresses the flow through other parts of circuit of electric current.
When the light output from photoflash lamp 16 and 17 was required, at first photoflash lamp must be by " decomposition " or " triggering ", so that create a conductive path that passes gas in the photoflash lamp.For trigger flashing lamp 16 and 17, high peak voltage is applied to flasher lamp glass shell outer surface by external trigger face 18 and 19.When needs light was exported, control system 13 signaled to circuits for triggering 20 by the TRIG signal.Circuits for triggering 20 apply potential pulse and trigger on elementary (Pri) winding of transformer T1 and T2 to each.Voltage on elementary (Pri) winding is exaggerated, and causes more high voltage so that induct on triggering transformer secondary output (Sec) winding.
By the triggering peak voltage V of generation
T1And V
T2Typically be 5～10kV, the duration is 10 microseconds, and the primary voltage pulse is about 200～400V.This xenon in the spike high voltage ionization photoflash lamp of photoflash lamp outside causes forming the conductive path from the photoflash lamp anode to negative electrode.
For a conductive path is provided, when the TRIG signal is applied to circuits for triggering 20, via control signal SW from control system 13
1And SW
2, open semiconductor switch 14 and 15 (that is to say, closure).If trigger peak voltage V
T1And V
T2Caused the inevitable ionization in photoflash lamp 16 and 17, electric current will flow through inductor L1 and L2, two photoflash lamps bottoms produce light from photoflash lamp internal ionization xenon and export.Simultaneously from the electric current of capacitor C1 flow through switch 14 and 15, and two photoflash lamps, the portion of energy that inductor L1 and L2 storage self-capacitance device C1 transport.
When the light output that comes from photoflash lamp 16 or photoflash lamp 17 reaches a predetermined high level, for preventing that further electric current is from the C1 corresponding photoflash lamp of flowing through, control system 13 corresponding switch 14 or 15 of opening; Described high level is limited by control circuit 13, and by signal S1 and S2 monitoring from optical sensor 21 and 22.For example, if photoflash lamp 16 reaches the light output valve that presets, from the signal SW of control system 13
1 Switch 14 is opened, stoped further electric current to flow out thus from capacitor C 1.When switch 15 closures, the energy of inductor L1 stored causes that electric current flows through photoflash lamp 16 via diode D1 (being commonly called " fly-wheel diode ").Light output by control system 13 by the S1 monitoring, and when this current attenuation during to the low spot be scheduled to, switch 15 closures, thereby the permission electric current restarts to flow from C1, this had both kept the output of photoflash lamp, again at inductor stored energy.Photoflash lamp 17 also is simultaneously and independently moves this process.
Repeat this process by frequency with 100～500kHz, from the output of the light of photoflash lamp can be the required light pulse duration (typically have one 1～100 millisecond duration) remain on constant level.In order to guarantee to dodge the constant output of turning off the light the required light pulse duration, the load coefficient between the open and close times of two switches 14 of impulse duration and 15 changes, so that compensation condenser C1 descends at the voltage of energy storage deenergized period.
Referring to Fig. 4, numerical control system comprises a processor unit 31 that contains suitable operation control software algorithm.By V
CThe charging voltage of the capacitor C1 of signal monitoring feeds back to analog to digital converter 32, and the numeral output of analog to digital converter 32 is read by processor unit 31.According to required charging voltage V
CValue, processor unit is via the SET signal control power supply, as the V that reaches expectation
CDuring value, the output of cutting off the electricity supply.When energy storage was dissipated behind the light output end-of-pulsing, capacitor C1 recharged by power supply, and power supply is equally by processor unit 31 controls.
The operator of device selects the energy of expectation to export optical parametric, pulse duration and pulse train (single pulse or multiple-pulse) by user interface 33.Processor unit 31 is with reference to the tables of data that is included in the memory cell 34, so that obtain the predetermined sensor reading, this reading is corresponding to the level of required light energy output.
From the signal of optical sensor 21 and 22 by two independently analog to digital converter 34,35 convert number format to so that read by processor unit 31, and be stored in memory cell 34 in tables of data defined in predetermined value compare.
Claims (9)
1. combination, it is characterized in that: the electron discharge lamp that has an output pulse in the wave-length coverage that can be created in visible spectrum at least, described output pulse has predetermined pulse interval and the predetermined total electric energy input of pulse, with the drive circuit that is used for transmitting to described electron discharge lamp a plurality of energy pulses, this drive circuit comprises:
A) can store the storage capacitor apparatus of the electric energy that is input to described circuit;
B) be used for charging device that described storage capacitor apparatus is charged repeatedly;
C) be used to allow transmit the switch of electric energy to described discharge lamp from described storage capacitor apparatus; With
D) be used for described preset time at interval in the drive unit of the described switch of opening and closing optionally, so that transmit a plurality of energy bags to described discharge lamp from described storage capacitor apparatus, the duration of each described bag less than described preset time at interval;
This combination further comprises:
Be used to detect light sensor arrangement from the light output of discharge lamp; With
Be used for responding the control device of handling described drive unit by the variation of the detected light output of described sensor device.
2. combination according to claim 1 is characterized in that: described control device comprise be provided with the light be used for detecting by sensor device export be stored in memory cell in the pre-calibration value processor unit of comparing.
3. combination according to claim 1 and 2 is characterized in that: this combination comprises a plurality of described discharge tubes.
4. combination according to claim 3 is characterized in that: this combination further comprises when detector shows one of them described discharge tube and is used to close the device of described discharge tube in the time of can not producing described output pulse.
5. electron discharge lamp is characterized in that: it can be created in broadband output pulse in the wave-length coverage of visible spectrum, and this output pulse has predetermined pulse interval and the predetermined total electric energy of pulse to import; Connected have one to transmit the drive circuit of energy pulse to this electron discharge lamp, and one is used to detect the transducer from the light output of this discharge lamp; With a controlling organization, be used to respond optical parameter by sensor to handle this drive circuit.
6. lamp according to claim 5 is characterized in that: this lamp comprises a plurality of electron-discharge tubes.
7. according to claim 5 or 6 described lamps, it is characterized in that: wherein controlling organization comprise one be provided with the light be used for detecting by sensor device export be stored in memory cell in the pre-calibration value processor unit of comparing.
8. the method for the impulse radiation source of driving a such as discharge lamp, it is characterized in that: this method comprises provides an energy storage capacitor, so that can store the electric energy that need be sent to described radiation source, and optionally to described energy storage capacitor charging, so that the form with a plurality of energy bags in the preset time interval is sent to described radiation source with described energy pulse, this method further comprises the light output of detection from this radiation source; With the parameter of response, transmit with the energy of control from this energy storage capacitor to this radiation source by sensor.
9. the methods of treatment of an optics beauty treatment is included as discharge lamp the electric energy input is provided, so that produce the light output pulse at animal tissue, it is characterized in that: described discharge lamp is driven by method according to Claim 8.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB0714126A GB0714126D0 (en) | 2007-07-20 | 2007-07-20 | Control for discharge lamp |
| GB0714126.0 | 2007-07-20 | ||
| PCT/GB2008/050586 WO2009013524A1 (en) | 2007-07-20 | 2008-07-17 | Control for discharge lamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101828431A true CN101828431A (en) | 2010-09-08 |
Family
ID=38476647
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200880107966A Pending CN101828431A (en) | 2007-07-20 | 2008-07-17 | Control for discharge lamp |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP2174533A1 (en) |
| JP (1) | JP2010534387A (en) |
| CN (1) | CN101828431A (en) |
| GB (1) | GB0714126D0 (en) |
| WO (1) | WO2009013524A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103108428A (en) * | 2013-01-29 | 2013-05-15 | 宁波金辉摄影器材有限公司 | Energy saving system of photoflood lamp |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7795819B2 (en) | 2004-06-03 | 2010-09-14 | Cyden Limited | Discharge lamp controls |
| GB2470927A (en) | 2009-06-10 | 2010-12-15 | Dezac Group Ltd | Phototherapy apparatus with skin temperature control |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3033191A1 (en) * | 1979-09-19 | 1981-04-02 | Xerox Corp., 14644 Rochester, N.Y. | FLASH LIGHTING DEVICE |
| DE4141675A1 (en) * | 1991-01-09 | 1992-07-16 | Heimann Gmbh | Flashlamp operation circuit performing continuous on=off switching - utilises semiconductor switch with photodiode in control circuit monitoring limiting current during discharge of capacitor |
| JP3740209B2 (en) * | 1996-03-01 | 2006-02-01 | キヤノン株式会社 | Flash device |
| US6888319B2 (en) * | 2001-03-01 | 2005-05-03 | Palomar Medical Technologies, Inc. | Flashlamp drive circuit |
| US7245224B2 (en) * | 2004-08-13 | 2007-07-17 | Dell Products Lp | Methods and systems for diagnosing projection device failure |
-
2007
- 2007-07-20 GB GB0714126A patent/GB0714126D0/en not_active Ceased
-
2008
- 2008-07-17 CN CN200880107966A patent/CN101828431A/en active Pending
- 2008-07-17 WO PCT/GB2008/050586 patent/WO2009013524A1/en active Application Filing
- 2008-07-17 EP EP08776221A patent/EP2174533A1/en not_active Withdrawn
- 2008-07-17 JP JP2010516599A patent/JP2010534387A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103108428A (en) * | 2013-01-29 | 2013-05-15 | 宁波金辉摄影器材有限公司 | Energy saving system of photoflood lamp |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2010534387A (en) | 2010-11-04 |
| WO2009013524A1 (en) | 2009-01-29 |
| EP2174533A1 (en) | 2010-04-14 |
| GB0714126D0 (en) | 2007-08-29 |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20100908 |