CN1577715A - Ignitor for short arc discharge lamp - Google Patents
Ignitor for short arc discharge lamp Download PDFInfo
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- CN1577715A CN1577715A CNA2004100556381A CN200410055638A CN1577715A CN 1577715 A CN1577715 A CN 1577715A CN A2004100556381 A CNA2004100556381 A CN A2004100556381A CN 200410055638 A CN200410055638 A CN 200410055638A CN 1577715 A CN1577715 A CN 1577715A
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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
Provided is a lighting device for a short arc type discharge lamp by which blackening of a tube wall is prevented and a longer lifetime is attained. A pair of electrodes 1 is arranged to be confronted each other at intervals of 2mm or less in a luminous tube 11 composed of silica glass. The lighting device comprises the short arc type discharge lamp with mercury of 0.16 mg/mm<SP>3</SP>or more, rare gas and halogen of a range of 1*10<SP>-6</SP>to 1*10<SP>-2</SP>[mu]mol/mm<SP>3</SP>sealed in the luminous tube 11, and an electric power supply unit that feeds a DC current to the discharge lamp at least when lighting is started. In the discharge lamp, one electrode of a pair of the electrodes is constituted by a coil. The DC current supplied to the discharge lamp by the electric power supply unit is 0.3 to 0.9 times the rated current at first, then it becomes 1.0 to 2.0 times the rated current, and after it becomes 1.05 to 1.5 times the rated current, predetermined electric power is obtained.
Description
Technical field
The present invention relates to a kind of short arc discharge lamp device.Specially refer to the lamp device of employed light source usefulness discharge lamp in the DLP projecting devices such as (digital lightprocessor, Digital Light Processors).DLP uses LCD device, DMD (digital mirror device, digital mirror device), and LCD device, DMD have 0.16mg/mm with enclosing in the luminous tube
3Above mercury, mercury steam pressure is that the above extra-high-pressure mercury vapour lamp of 110 air pressure uses as light source when lighting.
Background technology
The illumination that the requirement of porjection type projecting device averages image on the screen of rectangle, and require that color rendering is highly arranged, therefore, use the metal halide lamp of enclosing mercury, metal halide as light source.And recently, such metal halide lamp is further realized miniaturization, point-source of lightization, and the extremely little product of distance also is practical between the electrode.
Under this background, occurred new scheme recently: use unprecedented higher mercury steam pressure, for example the lamp of 150 air pressure comes the substituted metal halide lamp.Can suppress the expansion of (compression) electric arc by improving the steam pressure of mercury, the output that can further improve light simultaneously like this.
Such ultra-high pressure discharge lamp, the spy open flat 2-148561 number, special flat open in No. the 2980882nd, 6-52830 number, special permission open.
For example above-mentioned lamp is following extra-high-pressure mercury vapour lamp: in the luminous tube that is made of quartz glass, dispose pair of electrodes in opposite directions with the interval below the 2mm, enclose 0.16mg/mm in this luminous tube
3Above mercury, and 1 * 10
-6～1 * 10
-2Halogen in the μ mol/mm3 scope.The main purpose of enclosing halogen is the devitrification that prevents luminous tube, but also produces so-called " halogen cycle " by enclosing halogen.
But above-mentioned extra-high-pressure mercury vapour lamp (following also be called for short do discharge lamp) is along with the prolongation of lighting time, is transported to the inner surface of discharge vessel and attached thereto as the tungsten of negative electrode constituent material, produces so-called tube wall melanism.The tube wall melanism can cause light output to descend, and when the tube wall melanism is serious and since to the heat load of tube wall increase can the guiding discharge container breakage, be to cause the reason that the lamp life-span reduces.
In addition, enclose in the discharge lamp of halogen gas, by the life-span of so-called halogen cycle phenomenon in the hope of the prolongation lamp.But, as long as the temperature of discharge lamp consequently produces the problem of the tangible above-mentioned tube wall melanism and the lost of life because some reason one when changing, has just broken away from the optimum temperature range of halogen cycle.
For example, for being changed, environment for use noticed that dimming function, one of means of this function are exactly the power that supplies that changes lamp in the projecting device.In this case, the temperature of discharge lamp will change.
And in equipment such as projecting device, the action of the flicker of discharge lamp sometimes is very strong.And when the flicker of discharge lamp action repeated with high-frequency, the ratio that generation is not suitable for the temperature range of halogen cycle will uprise.Particularly the use owing to projecting device in the domestic consumption constantly increases, and discharge lamp is glimmered to use under high-frequency becomes very large problem.
Summary of the invention
The technical problem to be solved in the present invention is exactly to provide a kind of and can suppress owing to negative electrode constituent material tungsten is transported to the short arc super high voltage mercury vapor lamp tube wall melanism, that the life-span is grown that the discharge vessel inner surface causes.
In order to address the above problem, scheme 1 described short arc discharge lamp lamp device provides the electric supply installation of direct current to constitute by short arc discharge lamp and to this discharge lamp, in the above-mentioned short arc discharge lamp, in the luminous tube that constitutes by quartz glass, dispose anode and negative electrode opposite to each other with the interval below the 2mm, in this luminous tube, enclose: 0.16mg/mm
3Above mercury, rare gas, 1 * 10
-6～1 * 10
-2μ mol/mm
3Scope in halogen.
And it is characterized in that: the negative electrode of above-mentioned discharge lamp has the above coil of 1 circle at least; Above-mentioned electric supply installation carries out constant current control to above-mentioned discharge lamp when lighting starting, carry out permanent power control simultaneously thereafter; This constant current control has: provide first electric current of the 0.3-0.9 current value doubly of rated current that the phase is provided, and, provide second electric current of the 1.0-2.0 current value doubly of rated current that the phase is provided afterwards; Above-mentioned second electric current provide the phase this discharge lamp light power become the specified 1.05-1.5 at least that lights power doubly after, switch to specified and light the constant current control that performance number is a benchmark.
Further, it is characterized in that: the beeline of above-mentioned coil and above-mentioned luminous tube inner surface is in the 2.0mm.
The inventor studies through wholwe-hearted at above-mentioned problem, discovery is owing to the reason that electrode constituent material tungsten is transported to the problem of the tube wall melanism that the discharge vessel inner surface causes is: at the initial stage of lamp starting, at least the rear end part at the coil that has with cathode electrode is that this arc and discharge vessel inner surface contacted and cause when starting point formed arc.
Because this phenomenon, contact by arc and discharge vessel inner surface from the coil rear end part, be evaporated as the quartz glass of discharge vessel constituent material, thereby the conveying of above-mentioned tungsten is produced very big influence.
The inventor finds, for above-mentioned new problem in relevant the solutions short arc discharge lamp, starts the initial stage at lamp, is effective by the adjustment electric supply installation to the electric current supply of discharge lamp.
Description of drawings
Fig. 1 represents the discharge lamp that the present invention is correlated with.
Fig. 2 represents the electrode structure of the discharge lamp that the present invention is correlated with.
Fig. 3 represents current waveform, the power waveform of the discharge lamp that the present invention is correlated with.
Embodiment
What Fig. 1 represented is the unitary construction of the short arc type high-pressure discharge lamp (following also only be called " discharge lamp ") among the present invention.
The head of negative electrode 3 is wound with coil 31.This coil 31 is made of tungsten, is put on the spot securely or welds.By the concave-convex effect on surface, performance starting source (starting beginning position) effect is being lighted the function that heat radiation is undertaken by the concave-convex effect and the thermal capacity on surface in the back to coil 31 simultaneously when lighting starting.
Enclose in the illuminating part 10 mercury, rare gas and halogen gas are arranged.
Mercury is used to obtain necessary wavelengths of visible light, and for example the ray of wavelength 360-780nm is enclosed 0.16mg/mm
3More than.This enclosed volume is different along with temperature conditions, but is more than 150 air pressure, to become very high vapor pressure when lighting.In addition, by enclose mercury morely, can produce that mercury vapour air pressure when lighting reaches that 200 air pressure are above, the discharge lamp of the above such high mercury vapour air pressure of 300 air pressure, mercury vapour air pressure is high more, just can realize the light source that adapts with projecting device more.
Enclose rare gas, for example the argon gas of about 13kPa can be used to improve the starting performance when lighting.
Halogen with iodine, bromine, chlorine etc. to be enclosed with the compound form of other metals such as mercury.The enclosed volume of halogen can be from 10
-6～10
-2μ mol/mm
3Scope in select, though utilized the effect of halogen cycle to be to realize long useful life, but the lamp that has high interior pressure of the such minimal type of discharge lamp among the present invention, the main purpose of enclosing halogen is the breakage that prevents discharge vessel, and prevents its devitrification.
Illustrate the correlation values of discharge lamp: the external diameter of luminous component is selected from the scope of 6.0-15.0mm, for example is 9.5mm, and distance is selected from the scope of 0.5-2.0mm between the electrode, for example is 1.5mm, and the luminous tube internal capacity is selected from 40-300m m
3Scope, for example be 75mm
3For example ignition condition is: the tube wall load is selected from 0.8-2.0W/mm
2Scope, for example be 1.5W/mm
2, rated voltage is 80V, rated power is 200W.
In addition, this discharge lamp is built in the projecting device of miniaturization, because the very little miniaturization of device unitary construction, but require higher luminous quantity again simultaneously, so the thermal conditions in the illuminating part is very strict.
And discharge lamp carries at projecting device and overhead projector and is used for the machine that shows like this, and the radiating light with good color rendering can be provided.
In addition, this discharge lamp is built in the projecting device of miniaturization.
Fig. 2 represents near the enlarged configuration the negative electrode root.(a) (b) represent same structure, but (a) be mainly used in explanation structural member and represent, (b) be mainly used in the physical phenomenon in the explanation illuminating part and represent with label with label.
As discharge lamp of the present invention, carry lamp in device along with the requirement of projecting device miniaturization, the also miniaturization of strong request discharge lamp self as the light source of projecting device.On the other hand, under hot conditions, light, also need to take the heat release measure, make electrode have thermal capacity at discharge lamp, thus electrode have to need be to a certain degree size (volume).
That is to say, produced such situation: be the miniaturization requirement of discharge lamp on the one hand, require the volume of electrode to maximize on the other hand.
Therefore, as shown in the figure, the distance L of the wall (inner surface) of the coil 31 of negative electrode 3 and discharge vessel (illuminating part 11) becomes extremely short.For example, its numerical value is below the 2.0mm, particularly, also has the lamp that 1.5mm is following, 1.0mm is following.And here the distance of defined is meant the beeline between the wall of coil 31 and discharge vessel.
We can say that the distance of kind electrode and discharge vessel inner surface shortens and causes just: at the starting initial stage, when forming arc with the coil rearward end as starting point, this arc contacts with the discharge vessel inner surface.
Above-mentioned distance values is on reason, design specification according to discharge lamp can be different, so it can't be defined as absolute value originally, but because in the industry cycle, to the size of projecting device, the desired performance of light source is had defined to a certain extent, so consider such background, be above-mentioned distance values haply.
Physical phenomenon shown in Figure 2 is following content.
That is, when when the rearward end of coil 31 generates electric arc e, produce as shown in the figure with the contacting or collision of discharge vessel inner surface, this is guiding discharge inner surface of container local dent again, simultaneously, as the quartz glass (SiO of discharge vessel constituent material
2) evaporation.The SiO of evaporation
2Be separated into Si and O by discharge plasma, cause from the evaporation of the oxide WO of the tungsten of electrode head.After this tungsten oxide moved near the lower discharge vessel inner surface of temperature by convection current, a part was as WO
2Br
2Deng halogen compounds remain in the gas, a part as tungsten, WO
2Deng tungsten oxide separate out at the discharge vessel inner surface, cause the tube wall melanism.
Above-mentioned phenomenon occurs in the extremely approaching discharge lamp of coil and discharge vessel inner surface, the inventor finds: if the electric current that will be provided to discharge lamp at the starting initial stage diminishes, even arc and discharge vessel inner surface that the coil rearward end generates contact, its influence is also less, can solve above-mentioned problem like this.
Particularly, in lighting starting, electric supply installation offered the direct current of discharge lamp before the arrival rated current, having first electric current provides the phase and second electric current that the phase is provided, first electric current provide the electric current of phase be rated current 0.3-0.9 doubly, second electric current provide the phase be rated current 1.0-2.0 doubly.
Further, second electric current provides the phase to continue before performance number surpasses rated power at least, is set to rated current afterwards, and discharge lamp also becomes permanent power control.
Fig. 3 represents that electric supply installation offers the direct current waveform and the power waveform of discharge lamp.(a) expression current waveform, (b) expression power waveform, each longitudinal axis is represented current value, performance number respectively, the transverse axis express time.
Current waveform to (a) describes.
Under time t1, after the discharge tube lighting starting, direct current I1 flow into discharge lamp.The 0.3-0.9 that this current value I 1 is a load current value times, T1 provides the phase for first electric current during this period.It is constant current control that this first electric current provides phase T1, its current value that provides to discharge lamp is constant, just carry out so-called constant current control by current value is diminished, touch under the situation of discharge vessel inner surface even generate the undesired discharging arc from the coil rearward end, its influence also can reduce.
It can for example be 10 seconds from the 1.0-15.0 scope selection of second that first electric current provides the phase.In this period, because negative electrode heats up, be the Best Times that can move to the negative electrode head from the arc that the coil rearward end generates, can light environmental condition according to discharge lamp and other during this period and carry out suitable setting.
Current value I 1 be load current value 0.3-0.9 doubly, if littler, can't keep discharge than this scope, bigger than this scope, just can't ignore arc to the contact of discharge vessel inner surface.And the optimum range of current value I 1 is 0.4-0.8 a times of load current value.Particularly, for example at rated current I
LDuring for 2.7A, be set to 2.0A.
Under time t2, current value rises to I2 from I1.This current value I 2 becomes rated current I
L1.0-2.0 doubly, T2 provides the phase for second electric current during this period.This second electric current provides phase T2 to be controlled by constant current too.Second electric current provides the phase current value why to provide the phase to increase than first electric current, is because if current value or so low, and the rate of rise in temperature in the discharge space is slack-off, and the enhancing speed of light beam will be slack-off.And, play a role preferably in order to make halogen cycle, the temperature in the discharge lamp need be made as optimum temperature, also need to improve current value from this point.
Particularly, only provide a spot of electric current in the phase owing to providing at first electric current, on the meaning of this small amount of current of compensation, it is very important flowing into the current value bigger than load current value.That is to say, to provide in the phase in order suppressing at first electric current and to generate the influence of not wishing the arc discharge that produces from the coil rearward end, when being provided with the magnitude of current less, after arc discharge moves to electrode head, angle from the optimization of the enhancing speed of discharge lamp radiating light and halogen cycle is set out, and needs to increase the magnitude of current.
It can for example be 20 seconds from the 2-40 scope selection of second that second electric current provides the phase.Current value I 2 is load current value I
L1.0-2.0 doubly.Littler than this scope, near the fully heating of space electrode and the electrode, it is overheated that the words bigger than this scope are understood, and may cause the distortion of electrode etc.The optimum range of current value I 2 is 1.3-1.8 times of load current value.Particularly, rated current I for example
LDuring for 2.7A, be set at 4.0A.
Under time t3, the control of lighting of discharge lamp is become permanent power control from constant current control.By this variation, the electric current of lamp becomes lower load current value I from current value I 2
L
Here " rated current " is meant the central value that discharge lamp sets when lighting usually, is the numerical value shown among discharge lamp and packing container or the specification etc.For example rated power is that its rated current is 2.7A in the discharge lamp of 200W.
Under time t4, the electrorheological of lamp serve as reasons the calibration power value that is stabilized in power control discharge lamp light the value I that voltage determines
L
And the variation of current value from I1 to I2 is not limited to the variation of step as shown in the figure, also can be the variation of the stage of many steps, the perhaps variation of gradual change type.
In addition, from current value I 2 to load current value I
LVariation be not limited to the variation of gradual change type as shown in the figure, also can be the variation of the stage of many steps when step changes.These controls can be set at a plurality of stages with the calibration power value owing to be the control of permanent power, thereby can change rapidly but the electric current of lamp is sharply changed.
(b) corresponding to (a), the time that indication lamp is lighted power changes, during among T1, the T2 be certain constant current control owing to adopt current value, along with lighting the former rising of voltage, light power and also and then rise.
The discharge lamp that mercury etc. is enclosed as luminescent substance adopts following form usually: carry out constant current control at the initial stage of lighting, be converted to permanent power control afterwards.Why be that it is lower to light voltage because do not evaporate at the initial stage mercury of lighting like this,, will flow into excessive electric current if carry out permanent power control.Fully evaporate when lighting voltage and stabilizing to certain value at mercury, switch to permanent power control again.
Continuation describes according to accompanying drawing.In existing technology, under time t3 ', when the power of lamp reaches the power-handling capability of regulation, just under this moment, switch to permanent power control, but in the present invention, still proceed constant current control thereafter.Therefore performance number elapsed time t3 ' continues to rise till time t3.This control feature of the present invention just place provides the lower share of current value under the phase T1 in order to fill up first electric current, and the sequential that can switch to permanent power control is originally prolonged, and proceeds constant current control.
And, under time t3, switch to permanent power control from constant current control.The power W2 that lights before switching becomes and lights power W after the switching
L(rated power) R1.05-1.5 doubly.
Sum up above action, carry out when discharge tube lighting starts, current value being diminished, afterwards current value is become big constant current control.This constant current is controlled at discharge tube lighting voltage and still continues after fully rising, and from the performance number angle, proceeds constant current till the regulation performance number and controls to surpassing.Afterwards, switch to permanent power control, light with the power of regulation from the constant current control of stipulating.
Move by such starting of lighting, can suppress the problem of aforesaid discharge vessel melanism.
At this discharge lamp being carried out numerical value exemplifies:
The illuminating part external diameter can be a 8- 13mm scope, 10.0mm for example,
The illuminating part internal capacity can be 50-120mm
3Scope, for example be 65mm
3,
Interelectrode distance can be the scope of 0.7-2mm, for example is 1.0mm.
In addition, discharge lamp is lighted under rated power 200W.
In addition, electrode structure being carried out numerical value exemplifies:
The external diameter of coil 31 is the scope of 1.0- 2.0mm, for example is 1.3mm,
Length is the scope of 0.6-2.0mm, for example is 1.5mm.
The external diameter of axial region 5 is the scope of 0.2- 0.6mm, for example is 0.4mm,
The length of axial region 5 is the scope of 5.0-10.0mm, for example is 7.0mm.
And winding wire directly is the scope of 0.1- 0.3mm, for example is 0.25mm.
Lighting apparatus for discharge lamp of the present invention has several preconditions, has only and satisfies this precondition, just can bring into play effect of the present invention and effect.
The first, the prerequisite of the discharge lamp among the present invention is: interelectrode distance is that illuminating part has been enclosed 0.16mg/mm below the 2mm
3Above mercury, rare gas, 1 * 10
-6～1 * 10
-2μ mol/mm
3The short arc discharge lamp of the halogen in the scope.
Exactly because the discharge lamp of this structure just can be with the SiO that discharges from the discharge vessel inner surface
2Be decomposed into Si and O by discharge plasma, owing to the tungsten reaction generation tungsten oxide of oxygen (O) in this discharge space and electrode, so be transported to the tungsten generation surplus of inner surface of container from electrode.If the oxygen here (O) is an amount of, then can play halogen cycle, can suppress tungsten (W) and be transported in the discharge vessel inwall, resemble the discharge lamp among the present invention oxygen content more for a long time, tungsten oxide (WO in the discharge space
x) change is many, so superfluous tungsten oxide is transported to the discharge vessel inwall.
Second prerequisite is that discharge lamp has in the electrode structure of electrode axial region layout line circle (structure shown in Figure 2).Exactly because such discharge lamp generates the discharge starting point lighting when starting from the coil rear end, thus the problem that produces electric arc and the conflict of discharge vessel inner surface, contacts.And this problem significantly takes place when the beeline (distance L among Fig. 2) of coil and discharge vessel inner surface is less.Exactly because beeline L is less, just by the discharge starting point from the generation of coil rearward end, electric arc produces conflict, contacts with the discharge vessel inner surface.Particularly, beeline L is that 2.0mm is following, 1.5mm is following, significantly takes place when 1.0mm is following.
Therefore, in the bigger discharge lamp of distance L, because with the very difficult generation of phenomenon that to be the arc that causes of starting point contact, conflict with the discharge vessel inner surface of coil rearward end, thereby the technical task that does not exist the present invention to solve.
Therefore, for the discharge lamp that does not possess this structure, the diverse discharge lamp of use, the structure of winding around may be existing known structure on electrode.But, be the technology of different levels fully so we can say such look-ahead technique and the present invention because just there is not technical task in original electric arc and the phenomenon that the discharge vessel inner surface conflicts, contacts of just not taking place of such discharge lamp.
In the feature of the discharge lamp among the present invention, preferably the head of at least one electrode has jut.The jut of the head by anode or negative electrode can shrink electric arc, from lighting of starting initial stage, promptly two electrode heads is heated up, so can be in stable arc discharge rapidly, when discharge lamp is that illuminating part has been enclosed 0.16mg/mm
3Above mercury, rare gas and 1 * 10
-6～1 * 10
-2μ mol/mm
3Scope in the situation of short arc discharge lamp of halogen under, this projection can be controlled flexible automatically, thereby interelectrode distance can be adjusted into optimum value.
And jut can be pre-formed by utilizing axial region, thereby can limit the flexible direction of automatic control in advance.But jut does not form when discharge lamp is made, but can begin the formation of lighting along with lamp under the nought state.
Electrode is that tungsten more than 99.9999% constitutes by purity preferably.This is because when the impurity that contains in the electrode is released to discharge space, devitrification, the melanism of meeting guiding discharge container.
As mentioned above, lighting apparatus for discharge lamp among the present invention provides the electric supply installation of direct current to constitute by short arc discharge lamp and to this discharge lamp, in the above-mentioned short arc discharge lamp, in the luminous tube that constitutes by quartz glass, dispose anode and negative electrode in opposite directions with the interval below the 2mm, in this luminous tube, enclose: 0.16mg/mm
3Above mercury, rare gas, 1 * 10
-6～1 * 10
-2μ mol/mm
3Scope in halogen.And, it is characterized in that: in the pair of electrodes of this discharge lamp, have at least an electrode (negative electrode) that the above coil of 1 circle is arranged.And the direct current that electric supply installation provides discharge lamp be at the beginning rated current 0.3-1.0 doubly, be then rated current 1.0-2.0 doubly, afterwards power become rated power 1.05-1.5 doubly after, reach the power of regulation.
Claims (2)
1. short arc discharge lamp lamp device, provide the electric supply installation of direct current to constitute by short arc discharge lamp and to this discharge lamp, in the above-mentioned short arc discharge lamp, in the luminous tube that constitutes by quartz glass, dispose anode and negative electrode opposite to each other with the interval below the 2mm, in this luminous tube, enclose: 0.16mg/mm
3Above mercury, rare gas, 1 * 10
-6～1 * 10
-2μ mol/mm
3Scope in halogen, it is characterized in that:
The negative electrode of above-mentioned discharge lamp has the above coil of 1 circle at least;
Above-mentioned electric supply installation carries out constant current control to above-mentioned discharge lamp when lighting starting, and carries out permanent power control thereafter,
This constant current control has: during providing first electric current of the 0.3-0.9 current value doubly of rated current to provide, and, provide second electric current of the 1.0-2.0 current value doubly of rated current to provide afterwards during,
During above-mentioned second electric current provides this discharge lamp light power become the specified 1.05-1.5 at least that lights power doubly after, switch to specified and light the permanent power control that performance number is a benchmark.
2. short arc discharge lamp lamp device according to claim 1 is characterized in that:
The beeline of above-mentioned coil and above-mentioned luminous tube inner surface is in the 2.0mm.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003203647A JP4400125B2 (en) | 2003-07-30 | 2003-07-30 | Short arc type discharge lamp lighting device |
| JP203647/2003 | 2003-07-30 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1577715A true CN1577715A (en) | 2005-02-09 |
| CN100452285C CN100452285C (en) | 2009-01-14 |
Family
ID=34262926
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100556381A Expired - Fee Related CN100452285C (en) | 2003-07-30 | 2004-07-30 | Ignitor for short arc discharge lamp |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP4400125B2 (en) |
| CN (1) | CN100452285C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI411864B (en) * | 2005-05-18 | 2013-10-11 | Ushio Electric Inc | Polarized light irradiation device |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4972992B2 (en) * | 2006-05-10 | 2012-07-11 | ウシオ電機株式会社 | High pressure discharge lamp lighting device |
| JP4650795B2 (en) * | 2006-10-27 | 2011-03-16 | 岩崎電気株式会社 | High pressure discharge lamp lighting device |
| JP5010987B2 (en) * | 2007-05-31 | 2012-08-29 | 株式会社ワコム電創 | How to turn on the high-pressure discharge lamp |
| JP5320006B2 (en) * | 2008-10-03 | 2013-10-23 | 株式会社オーク製作所 | Exposure drawing device |
| JP6365061B2 (en) | 2013-10-11 | 2018-08-01 | セイコーエプソン株式会社 | Discharge lamp driving device, light source device, projector, and discharge lamp driving method |
| JP6248528B2 (en) | 2013-10-11 | 2017-12-20 | セイコーエプソン株式会社 | Discharge lamp driving device, light source device, projector, and discharge lamp driving method |
| JP6303704B2 (en) | 2013-10-11 | 2018-04-04 | セイコーエプソン株式会社 | Discharge lamp driving device, light source device, projector, and discharge lamp driving method |
| JP2016051628A (en) | 2014-09-01 | 2016-04-11 | セイコーエプソン株式会社 | Discharge lamp driving device, light source device, projector, and discharge lamp driving method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1042037A (en) * | 1989-06-10 | 1990-05-09 | 李上灿 | Direct current electronic controller for fluorescent lamp |
| CN1113583C (en) * | 1996-09-24 | 2003-07-02 | 马士科技有限公司 | Electronic ballast for fluorescent lamp |
| US6255783B1 (en) * | 1998-03-17 | 2001-07-03 | Ventex Group Llc | Gas discharge lamp power supply with feed forward compensation for input voltage variations |
| FI107580B (en) * | 1999-03-30 | 2001-08-31 | Innoware Oy | Fluorescent light supply connection |
| JP2000306687A (en) * | 1999-04-20 | 2000-11-02 | Hisanaga Denki:Kk | Control method for high pressure discharge lamp |
| US6329761B1 (en) * | 2000-06-30 | 2001-12-11 | Ebs International Corporation | Frequency controlled half-bridge inverter for variable loads |
-
2003
- 2003-07-30 JP JP2003203647A patent/JP4400125B2/en not_active Expired - Lifetime
-
2004
- 2004-07-30 CN CNB2004100556381A patent/CN100452285C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI411864B (en) * | 2005-05-18 | 2013-10-11 | Ushio Electric Inc | Polarized light irradiation device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2005050576A (en) | 2005-02-24 |
| CN100452285C (en) | 2009-01-14 |
| JP4400125B2 (en) | 2010-01-20 |
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