CN101356861B - Discharge lamp lightening device and illuminator - Google Patents
Discharge lamp lightening device and illuminator Download PDFInfo
- Publication number
- CN101356861B CN101356861B CN2007800013902A CN200780001390A CN101356861B CN 101356861 B CN101356861 B CN 101356861B CN 2007800013902 A CN2007800013902 A CN 2007800013902A CN 200780001390 A CN200780001390 A CN 200780001390A CN 101356861 B CN101356861 B CN 101356861B
- Authority
- CN
- China
- Prior art keywords
- filament
- discharge lamp
- mentioned
- heat
- adds
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Classifications
-
- 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
- H05B41/295—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 with preheating electrodes, e.g. for fluorescent lamps
Landscapes
- Circuit Arrangements For Discharge Lamps (AREA)
- Discharge-Lamp Control Circuits And Pulse- Feed Circuits (AREA)
Abstract
Current detecting means (6) detects the lamp current value of a discharge lamp (3). Control means (8) determines the filament heating rate corresponding to the then lamp current value from the stored data or by computation . Detecting means (5) detects the filament heating rate and judges whether or not the detected filament heating rate agrees with the stored filament heating rate by comparison between them. If the detected filament heating rate is out of the area shaded with diagonal lines shown in FIG 3, the on-duty of a switch (7) is controlled so that the detected filament heating rate is within the area. That is, if the filament heating rate is insufficient, the on-duty is increased; if the filament heating rate is judged as excessive, it is decreased.
Description
Technical field
The present invention relates to the discharge of hot cathode type etc. is being carried out the lighting device that the control filament adds the lighting apparatus for discharge lamp of heat and used lighting apparatus for discharge lamp under the situation that light modulation lights.
Background technology
When the discharge of hot cathode type etc. being carried out under the situation that light modulation lights, knownly change filament according to this light modulation degree and add the life-span of the mode of heat at discharge lamp, perhaps satisfactory aspect power saving.As having proposed the special method of opening the record of 2005-235619 communique with the corresponding example of such request.
Opening the technology of putting down in writing in the 2005-2351619 communique the spy is that the switch block that is cut into the preheating transformer on the output that is arranged on converter is set, according to the conducting duty ratio of this switch block of light modulation extent control.
But; Open in the method for putting down in writing in the 2005-235619 communique the spy; Because just according to the light modulation degree with predetermined fixed the conducting duty ratio that sets carry out the break-make of switch block, can not make filament add the situation of suitableization of heat accordingly with the lamp current of the reality of discharge lamp so have.That is, the heat that adds that can not confirm actual filament is arranged, can not make filament add the situation of suitableization of heat.For example, the filament of each discharge lamp not exclusively is that same quality has deviation, and for the big filament of deviation, the heating quantitative change of filament cannot not get suitablely.
In addition, because of the main cause of the change of the manufacture deviation of preparatory transformer, power supply voltage variation, environment temperature etc., in the conducting duty ratio control of predefined unanimity, can think suitableization that to seek the filament heating.
Summary of the invention
Thereby; The object of the present invention is to provide a kind of lighting apparatus for discharge lamp and lighting device; Even at the deviation of the filament that above that kind is arranged, the manufacture deviation of preheating transformer, perhaps other external disturbance, that also can convey the corresponding filament of light modulation degree adds suitableization of heat.
The lighting apparatus for discharge lamp of the 1st form of the present invention is characterised in that to possess: exporting variable lamp device, is the discharge lamp that high frequency voltage is lighted the hot cathode type with the output transform of continuous-current plant; Export variable heater block, be used to heat the filament of above-mentioned discharge lamp; Detection part is used to detect the heat that adds of above-mentioned filament; Control assembly; Storage in advance adds heat with the corresponding filament of light modulation degree of above-mentioned discharge lamp; When correspondingly controlling the output of above-mentioned lamp device, control the output of above-mentioned heater block so that the above-mentioned filament that adds heat and become storage in advance of the filament that detects with above-mentioned detection part adds heat with dim signal.
And in the invention of the 1st form and following invention, the definition or the technical meaning of term are following.
Continuous-current plant is that storage battery, source power supply voltage are carried out rectification, perhaps carries out level and smooth device as required, perhaps also allows other device.When source power supply voltage being carried out under rectification, the level and smooth situation, be the main active filter that constitutes if use with the boost chopper, then can reduce the radio-frequency component of input current, in addition, effective aspect control output voltage arbitrarily.
Though the discharge lamp of hot cathode type is representational to be fluorescent lamp, is not limited to this, in addition, also can be that general lighting is used, sterilization is used, to decorate the lamp of using, showing that kind such as using as purposes.
Lamp device for example, can use formations such as converter, transducer or chopper so long as the output voltage of continuous-current plant is transformed to high frequency voltage gets final product.In addition, even these converters, transducer or chopper, circuit mode is also unqualified.
Heater block can be that the part with the output of lamp device loads, loaded by the output of continuous-current plant or the output of source power supply, and which of the parts that perhaps loaded by another power supply is all right.In addition, as its concrete formation, be the filament heater coil is set on the constituent part of transformer, lamp device, forming the part etc. of the circuit make the circulation of filament heating current, which is all right.
Detection part is the parts that add heat that detect filament, can constitute the electric current, the voltage that detect filament, perhaps detects filament temperature.
Control assembly is stored in advance with the corresponding filament of light modulation degree and is added heat.The heat that adds of filament in this case is the short lifeization that can prevent by the very few discharge lamp that causes of heating, can prevent the scope because of the melanism that heats the discharge lamp bulb that too much causes.Such scope can be lighted time set according to the accumulative total of the kind of discharge lamp or purposes, discharge lamp.It can be in tables of data, to store the form that adds heat with the corresponding filament of light modulation degree that so-called storage in advance adds heat with the corresponding filament of light modulation degree, perhaps, also can be the storage computation formula, tries to achieve in each calculating according to the light modulation degree of this moment.But in the present invention, the content of storing self does not have characteristic, and with according to the light modulation degree, and the actual filament heated condition of feedback suits to turn to characteristic.
In addition, control assembly changes the output of lamp device according to dim signal, but specifically, can change output according to the control of the action of the change of the output voltage values of continuous-current plant, lamp device etc.For example lamp device can change output through switching frequency, the conducting duty ratio of controlling these switching devices under situation about constituting with converter, transducer, chopper etc.
In addition, though the output of control assembly control heater block, it also is to form according to the formation of heater block that control in this case constitutes.For example, as stated under the situation of using transformer, as long as the input voltage of control transformer needs only the voltage that applies of controlling constituent part under the situation that heater winding is set in the constituent part at converter.In addition, under the situation of the part that uses the circulation flow path that forms heating current, as long as the resistance value of the above-mentioned part of control, the switching of carrying out above-mentioned circulation flow path with switch gets final product.
The control assembly of above that kind is except being integrally formed, and not special qualification the in the structure that the part of the part of control circuit device and control heater block constitutes respectively etc. is as long as mainly carry out above-mentioned effect.
More than, as the control assembly of above that kind, for example use IC, microcomputer, DSP formations such as (numerical signal processors), the parts that carry out calculation process are strong aspect processing speed, miniaturization.Particularly under the situation of DSP, fast operation, it is suitable to add the situation of heat at 0.5 second with inner control.
The invention of the 1st form changes the amount of power supply to discharge lamp according to the output of dim signal control circuit device.Thus, discharge lamp with the corresponding light modulation degree of dim signal under light.The filament of this moment adds heat and detects with detection part, is controlled to the corresponding filament of storing in advance of above-mentioned light modulation degree to add heat.Thereby filament is no matter how the manufacture deviation of the deviation of filament, heater block, other outside main cause all are controlled at predefined filament and add heat.
Thereby; If adopt the 1st invention; Then no matter the manufacture deviation of the deviation of filament, heater block, other the external disturbance main cause how; Can both in the long lifetime that can realize discharge lamp, the lighting apparatus for discharge lamp that can also economize electrification can be provided according to the light modulation degree with the predefined filament that adds heat heating discharge lamp.
The lighting apparatus for discharge lamp of the 2nd form of the present invention is characterized in that possessing: the continuous-current plant that can change output voltage values; Converter has the series resonant circuit of pair of switches device that is connected in series each other and the switch that this switching device is provided output, and the output voltage of above-mentioned continuous-current plant is transformed to the discharge lamp that high frequency voltage is lighted the hot cathode type; Heater block is exported through the switch of above-mentioned converter and to be loaded, to the filament heating of above-mentioned discharge lamp; Detection part is used to detect the heat that adds of above-mentioned filament; Control assembly; Storage in advance adds heat with the corresponding filament of light modulation degree of above-mentioned discharge lamp; When having set the light modulation degree with dim signal; Change the output voltage values of above-mentioned continuous-current plant so that the above-mentioned filament that the filament that detects from above-mentioned detection part adds heat becomes storage in advance adds heat, and change the switching frequency of above-mentioned converter so that the light output of above-mentioned discharge lamp becomes the light modulation degree through setting.
In the invention of the 2nd form, so-called heater block leans on the switch output energising of converter to be illustrated under the situation of the output voltage values that has changed continuous-current plant, is in the relation of the output variation of heater block as its result.It constitutes not special the qualification, for example, and can be as with the invention of the 1st form is explained, form relatedly.
The lighting apparatus for discharge lamp of the 2nd form changes the switching frequency of converter according to dim signal, thereby the resonance output that changes series resonant circuit changes the amount of power supply to discharge lamp.Thereby discharge lamp is to light with the corresponding light modulation degree of dim signal.On the other hand, filament adds heat and detects with detection part, as the corresponding filament of above-mentioned light modulation degree with storage in advance adds heat, changes the output voltage values of continuous-current plant according to this detected value.With the correspondingly switch output variation of converter of output voltage values of this continuous-current plant, the output of heater block changes, and the corresponding filament of light modulation degree that is controlled at and stores adds heat.What is called is stored in advance with the corresponding filament of light modulation degree and is added heat, can be that storage adds the form of heat with the corresponding filament of light modulation degree in tables of data, perhaps, can the storage computation formula, correspondingly try to achieve with calculating with the light modulation degree of this moment at every turn.And when because the variation of the output voltage values of continuous-current plant, the light modulation degree of discharge lamp will break away under the situation of set point, through the control of switch periods, and the light modulation degree that can be arranged to set.
Thereby; If adopt the 2nd invention; Then except the effect of the invention of the 1st form; Because the control of the control of output voltage values that can enough continuous-current plants and the switching frequency of converter constitutes, thus can all formations of fairly simple ground setting device, and can provide can miniaturization, the lighting apparatus for discharge lamp of low price.
The lighting apparatus for discharge lamp of the 3rd form of the present invention is in the lighting apparatus for discharge lamp of the 1st or the 2nd form; It is characterized in that: above-mentioned control assembly possesses the parts of the judgement of the kind of carrying out above-mentioned discharge lamp, and the result of determination calculating filament of accordinging to the kind of above-mentioned light modulation degree and discharge lamp adds heat.
If adopt the 3rd lighting apparatus for discharge lamp, then can use identification signal to judge the kind of discharge lamp, can become the filament of target to add heat according to the kind changes persuing of discharge lamp.
The lighting apparatus for discharge lamp of the 4th form of the present invention; In the lighting apparatus for discharge lamp of the 1st or the 2nd form; It is characterized in that: above-mentioned control assembly possesses infers the parts that the time is lighted in above-mentioned accumulation, and the result that infers who lights the time according to above-mentioned light modulation degree and above-mentioned accumulation calculates filament and adds heat.
If adopt the 4th form lighting apparatus for discharge lamp; Then the detection of the filament voltage through carrying out discharge lamp, modulating voltage etc. can be inferred with the corresponding accumulation of the outmoded degree of discharge lamp and lighted the time, can according to the accumulation of electric light light the time correspondingly changes persuing become the filament of target to add heat.
The lighting apparatus for discharge lamp of the 5th form of the present invention in the lighting apparatus for discharge lamp of the 3rd form, is characterized in that: the setting of the kind of above-mentioned discharge lamp is carried out with the code that mechanical switch sets through the kind according to employed discharge lamp.
If adopt the lighting apparatus for discharge lamp of the 5th form, then can use cognizance code to set with the parts of toggle switch etc. according to the kind of employed discharge lamp.
The lighting apparatus for discharge lamp of the 6th form of the present invention is characterized in that in the lighting apparatus for discharge lamp of one of the 1st to the 5th form: above-mentioned detection part has: detect the parts for the discharge lamp electric current of light modulation degree; Detect discharge lamp electric current and heater current and parts, to the testing result of above-mentioned discharge lamp electric current and above-mentioned discharge lamp electric current and heater current and feed back in calculate.
If adopt the lighting apparatus for discharge lamp of the 6th form; Then detect detection part that filament adds heat through to as the discharge lamp electric current of discharge lamp electric current (lamp current), as the heater current of filament heating current and detect, can detect the electric energy (adding heat) that on filament, consumes approx.
The lighting apparatus for discharge lamp of the 7th form of the present invention is characterized in that in the lighting apparatus for discharge lamp of one of the 1st to the 5th form: above-mentioned detection part carries out the detection that filament adds heat in adding the minimum filament of heat in a plurality of filaments of above-mentioned discharge lamp.
If adopt the lighting apparatus for discharge lamp of the 7th form; Then add under the situation of lower limit of Sq of heat when the filament of paying attention to relative discharge lamp change in current; In a plurality of filaments of discharge lamp adding the detection that the minimum enterprising portable lighter silk of filament of heat adds heat, if its detected value has surpassed the lower limit of Sq, then in filament in addition; Infer and become all above the heat that adds of lower limit, the optimum control that filament adds heat becomes easy.
The lighting apparatus for discharge lamp of the 8th form of the present invention is in any 1 lighting apparatus for discharge lamp of the 1st to the 5th form; It is characterized in that: above-mentioned control assembly has the ratio that each filament in a plurality of filaments adds heat in advance; Above-mentioned detection part can be implemented the detection that filament adds heat in the filament arbitrarily of above-mentioned discharge lamp, above-mentioned control assembly uses the detection position of above-mentioned detection part and the heat that adds that above-mentioned ratio calculated and set filament.
If adopt the lighting apparatus for discharge lamp of the 8th form; Then when under the situation of a plurality of discharge lamps that are connected in series between high potential one side and electronegative potential one side; Add inferring of heat as each filament; If detect the lamp current of high potential one side and electronegative potential one side, then can roughly carry out electric current infer and each filament based on this in the inferring of lamp current.Then, use inferring of lamp current in this each filament to carry out each filament and add inferring of heat, possess this ratio in advance.Under such prerequisite; For example add under the situation of heat in the mediation of electronegative potential one side if want; If detect one of them then get final product according to ratio control thereafter, and if perhaps detected one of them other filament add heat through changing the scope that can be set to the best according to separately ratio.
The lighting apparatus for discharge lamp of the 9th form of the present invention is in the lighting apparatus for discharge lamp of one of the the 1st, the 3rd to the 8th form; It is characterized in that: above-mentioned lamp device has the series resonant circuit of pair of switches device that is connected in series each other and the switch that this switching device is provided output; Above-mentioned heater block is arranged in series in non-power supply one side of a pair of filament of above-mentioned discharge lamp through the resonating capacitor with above-mentioned series resonant circuit; Heat this filament; Above-mentioned control assembly flows through the electric current of above-mentioned filament through increase and decrease, controls the heat that adds of above-mentioned filament.
If adopt the lighting apparatus for discharge lamp of the 9th form; Then owing to be arranged to flow through the formation of filament heating current through resonating capacitor as the part of filament and series resonant circuit; Leakage current during not from the high potential one side direction electronegative potential one effluent overdischarge lamp current of discharge lamp can carry out high efficiency filament and add thermal control.
The lighting apparatus for discharge lamp of the 10th form of the present invention in the lighting apparatus for discharge lamp of the 9th form, is characterized in that: above-mentioned control assembly possesses: impedance, parallelly connected configuration with the filament of above-mentioned discharge lamp, and with above-mentioned resonating capacitor configured in series; Switch block and above-mentioned impedance are connected in series, the electric current that control flows into; Filament adds the heat control assembly, through above-mentioned switch block is carried out switch, controls the heat that adds of above-mentioned filament.
If adopt the discharge lamp deivce of the 10th form; Then because the part of the filament heating current that will flow through filament and resonating capacitor is arranged to the formation shunted through the series circuit of impedance and switch block; Thereby can enough switch blocks the electric current of this shunting be carried out break-make; Control flows is crossed the magnitude of current of filament, can control filament and add heat.
The lighting device of a kind of form of the present invention is characterized in that possessing: the ligthing paraphernalia main body; Be installed in the discharge lamp of the hot cathode type on this ligthing paraphernalia main body; Light the lighting apparatus for discharge lamp of one of the 1st to the 10th form of this discharge lamp.
If adopt the invention of this a kind of form, the lighting device that plays with the lighting apparatus for discharge lamp same effect of the invention of one of the 1st to the 10th form can be provided then.
Description of drawings
Fig. 1 is the circuit diagram of the 1st execution mode of expression lighting apparatus for discharge lamp of the present invention.
Fig. 2 is a part that cuts out Fig. 1, and the enlarged drawing of glower end electron current is described.
Fig. 3 is the lamp current of presentation graphs 1 and the figure of the relation that filament adds heat.
Fig. 4 is the circuit diagram of the 2nd execution mode of expression lighting apparatus for discharge lamp of the present invention.
Fig. 5 is the circuit diagram of the 3rd execution mode of expression lighting apparatus for discharge lamp of the present invention.
Fig. 6 representes the lamp current of different relatively discharge lamps and the figure of the relation that filament adds heat.
Fig. 7 is the circuit diagram of the 4th execution mode of lighting apparatus for discharge lamp of the present invention.
Fig. 8 is the figure of an example of the judgement part of discharge lamp kind.
Fig. 9 relates to the 5th execution mode of lighting apparatus for discharge lamp of the present invention, the figure of the control flow of expression lighting apparatus for discharge lamp.
Figure 10 relates to the 5th execution mode, representes the key diagram of appearance of the control of relative discharge lamp kind A.
Figure 11 relates to the 5th execution mode, representes the key diagram of appearance of the control of relative discharge lamp kind B.
Figure 12 is the circuit diagram of the 6th execution mode of expression lighting apparatus for discharge lamp of the present invention.
Figure 13 is the key diagram that amplifies the glower end electron current detection of a part of representing Figure 12.
Figure 14 is the upper limit of expression filament heating amount and the figure of lower limit.
Figure 15 is illustrated in the figure that 2 lamps series connection being used in lighting adds the position of the lamp current test point that heat detects.
Figure 16 is the circuit diagram of the 7th execution mode of expression lighting apparatus for discharge lamp of the present invention.
Figure 17 is a circuit diagram of the impedance among Figure 16 being arranged to capacitor.
Figure 18 be illustrated among Figure 17 close, the figure of the heater current the when switch of open filament is controlled respectively.
Figure 19 is the stereogram of a kind of execution mode of expression lighting device of the present invention.
Embodiment
Below, with reference to description of drawings execution mode of the present invention.
[the 1st execution mode]
Below, the 1st execution mode of lighting apparatus for discharge lamp of the present invention is described referring to figs. 1 through Fig. 3.Fig. 1 is the figure of the 1st execution mode of expression lighting apparatus for discharge lamp of the present invention; Fig. 2 is a part that cuts out Fig. 1; The enlarged drawing of glower end electron current is described, Fig. 3 is the discharge lamp electric current (below, be called lamp current) of presentation graphs 1 and the figure that filament adds the relation of heat.
The detection part that adds heat 5 that detects filament is set on discharge lamp 3 one sides' filament.In this execution mode, detect heater current.At length say, as shown in Figure 2, ask lamp current Il and filament heating current If with quadratic sum filament heating current If (Il+If) square with.In addition, Fig. 2 is the enlarged drawing that cuts out the part of Fig. 1, in Fig. 2, and the output power supply of equal value of symbol 21 expressions and heater block 4.
Return Fig. 1, the power supply road with lamp current on discharge lamp 3 in series is provided with current detecting part 6, the sensed lamp current value.Also can the light parts of this current detecting part 6 as discharge lamp 3 be used.In addition, series connection setting adds heat control with switch 7 on above-mentioned heater block 4, can control the input to heater block 4.
Below, symbol 8 is control assemblies, is the parts of control of break-make of control and above-mentioned switch 7 that carry out the output of above-mentioned lamp device 2, in addition, storage adds heat with the corresponding filament of light modulation degree of discharge lamp 3.The memory contents of this execution mode is as shown in Figure 3 be lamp current Il with (Il+If) square and the corresponding relation of the quadratic sum of filament heating current If.That is, though discharge lamp 3 according to this light modulation degree and change lamp current value, with (Il+If) square and filament heating current If square with regulation relatively the filament that suits of this lamp current value add heat.In Fig. 3, oblique line portion is the optimum range of filament heating, and along with the increase of lamp current, optimum range enlarges.But, can stipulate with the relation of lamp current Il and filament heating current If merely.So long as get final product with the relation regulation of the signal of representing the filament heated condition and the signal of the light modulation illuminating state of representing discharge lamp.As the form of storage, both can be that tables of data also can be a formula.
As this control assembly 8; The enough IC of ability, microcomputer, digital signal processor formations such as (DSP); As its function, possess calculation control portion (CPU), main storage, program storage, nonvolatile memory, analog-to-digital converter (AD converter), interface circuit (I/F circuit) etc.Then, this control assembly 8 as required, the control sequence the during beginning of storage discharge lamp 3, according to from the detection signal control flow of current detecting part 6 can be carried out control according to this memory contents.
In the input dim signal, the input filament adds the detection signal of heat detection part 5 and current detecting part 6 in this control assembly 8.Then, according to dim signal, as the light modulation degree that discharge lamp 3 becomes regulation, change the output of lamp device 2.In addition, know lamp current, as become the filament corresponding and add (control of conducting duty ratio) during the opening of control switch 7 the heat with this lamp current through the detection signal of current detecting part 6.
In addition, control assembly 8 as required under situation about departing from from the value of setting with dim signal corresponding with the light modulation degree from current detecting part 6 detected lamp current value the output of control circuit device 2 control the lamp current value that becomes regulation.
Below, the effect of this execution mode is described.Through the boot sequence control of control assembly 8, lamp device 2 carries out filament and adds thermal output, starting resistor output when the startup of discharge lamp 3.If the detection signal with current detecting part 6 detects lighting of discharge lamp 3, then control assembly 8 carries out the output control of lamp device 2 so that light entirely or light with the light modulation degree after setting.
Under this state,,, control assembly 8 adds heat so can knowing with the corresponding filament of lamp current value of this moment through the data of storing or calculating formula because detect lamp current value with current detecting part 6.On the other hand, because add the heat that adds that heat detection part 5 detects filaments, so through differentiating consistent perhaps inconsistent with the contrast that the filament of storing adds heat with filament.For example, when detected filament adds outside the oblique line portion of heat at Fig. 3, as the conducting duty ratio of the conducting of control switch 7 being in the oblique line portion.That is, increase the conducting duty ratio under the situation that adds shortage of heat for filament, reduce the conducting duty ratio when differentiating under the situation that adds the heat surplus for filament when differentiating.
Thus, filament add heat all the time in the oblique line portion of Fig. 3, can eliminate the short lifeization of the discharge lamp that causes because of underheat and bulb melanism and the energy loss that disperses and produce by the superfluous emission that causes of heating.
[the 2nd execution mode]
The 2nd execution mode of the present invention is described.Fig. 4 is the circuit diagram that the 2nd execution mode of lighting apparatus for discharge lamp of the present invention is adopted in expression.And in Fig. 4, the symbol that mark is identical on the part identical or corresponding with Fig. 1 also omits explanation.
This execution mode is a mode of having used the converter of semi-bridge type as lamp device 40.The a pair of MOS type FET41 that this converter will be connected in series each other, 42 with the lead-out terminal of continuous-current plant 1 between be connected, a relative side's FET42 is provided with series resonant circuit 43 with the parallel connection relation.Series resonant circuit 43 comprises direct current cut-off capacitance device 44, current limliting is used and the capacitor of the inductor 45 of resonance usefulness and resonance usefulness.Inductor 45 also has the function as stabilizer (steady resistance) originally.
In addition, the heater block 47 usefulness direct currents of this execution mode form by the series circuit with capacitor 48 and filament heating transformer 49.Symbol a, b be illustrated in filament add in the heat detection part 5 add heat detect in the test point of electric current of needs.
Below, the effect of this execution mode is described.Control assembly 8A and dim signal are correspondingly controlled a pair of MOS type FET41,42 switching frequency.Thus, because offer the frequency change of the switch output of series resonant circuit 43,, offer the power change of discharge lamp 3 so resonance output changes.That is, discharge lamp 3 is lighted with the light modulation degree of the regulation set with dim signal.The lamp current value of this state detects with current detecting part 6, and filament adds heat and adds 5 detections of heat detection part with filament in addition, and the break-make of control assembly 8A control switch 7 makes the corresponding filament of lamp current value that becomes with this moment add heat.Thereby, become the effect same with Fig. 1.
[the 3rd execution mode]
The 3rd execution mode of the present invention is described.Fig. 5 is the circuit diagram of the 3rd execution mode of expression lighting apparatus for discharge lamp of the present invention.In Fig. 5, with the identical or corresponding part of Fig. 1 or Fig. 4 on additional phase with symbol and omit explanation.
The continuous-current plant 50 of this execution mode has been to use the device of the active filter of being made up of boost chopper.That is, continuous-current plant 50 has: the rectifying device 52 of the output of rectification commercial ac power source 51; Can let the MOS type FET54 of short circuit between the output of this rectifying device 52 via inductor 53; The smmothing capacitor 56 that is connected in parallel via diode 55 with this FET54.
In addition, in this execution mode, in the switch 7 in omitting the 1st and the 2nd execution mode, the conducting duty ratio of control assembly 8B control MOS type FET54 can be used, the output voltage values of continuous-current plant 50 can be changed.
The effect of this execution mode is described.Control assembly 8B is according to a pair of MOS type FET41 of dim signal control circuit device 40,42 switching frequency.Thus, the electric energy that offers discharge lamp 3 changes, and discharge lamp 3 is lighted under the light modulation degree of the regulation of setting with dim signal.The lamp current value of this state detects with current detecting part 6, and filament adds heat and adds 5 detections of heat detection part with filament in addition, and the conducting duty ratio of control assembly 8B control MOS type FET54 adds heat so that become with the corresponding filament of lamp current value of this moment.Continuous-current plant 50 is because change through exporting with the conducting duty ratio of control assembly 8B control MOS type FET54, so the voltage that is applied on the heater block 47 also changes.Thus, the heating current of control filament becomes and can control filament and add heat.
And; If the output voltage of continuous-current plant 50 changes; Then the amount of power supply that also changes discharge lamp 3 of resonance voltage value also will change, but in contrast, control assembly 8B is through a pair of MOS type FET41 of control circuit device 40,42 switching frequency; Make the detected value of current detecting part 6 become the value of the light modulation degree of regulation, can be stabilized in the value through setting of lamp electric energy.
[the 4th execution mode]
With reference to Fig. 6 to Fig. 8 the 4th execution mode of the present invention is described.Fig. 6 representes the lamp current of different relatively discharge lamps and the figure of the relation that filament adds heat.
In Fig. 6, transverse axis is represented the lamp current Il of discharge lamp, and the longitudinal axis is represented to be equivalent to filament and added heat, electric current (Il+If) square and filament add heat If square with.In Fig. 6, represent that discharge lamp FLR40S, the FL40SS of relative 40 watts of levels, the filament of FHF32 desk lamp with dimmer switch electric current I l separately add the higher limit and the lower limit of heat.Thereby; When in Fig. 1,4,5 execution mode, lighting jointly under the situation of these discharge lamps; The grid part of Fig. 6 is because all become suitable filament heating weight range (being common optimum range) for each discharge lamp, so the control filament adds heat so that be in this optimum range in whole lamps.
And, in Fig. 6, on the little zone of lamp current, there is not the grid part.Thereby the part that it is desirable to preferably grid is not partly had limits the light modulation action as the lower limit of desk lamp with dimmer switch electric current I l.Perhaps, the parts of the kind that detects discharge lamp are set, also can in the suitable scope of separately discharge lamp, carry out the filament heating.
Fig. 7 representes the circuit diagram of the 4th execution mode of lighting apparatus for discharge lamp of the present invention, and Fig. 8 representes an example of the judgement part of discharge lamp kind.The formation of Fig. 7 and above-mentioned Fig. 4 is roughly the same.
For example, in Fig. 7, constituting by lamp device 40 is that converter is transformed to interchange with DC power supply 1, utilizes series resonant circuit 43 to obtain the high voltage that in the lighting of discharge lamp 3, needs.As heater block 47 is a kind of form of filament heating circuit, and expression is through controlling the heater circuit that adds heat with the switch 7 of the MOSFET that has used that kind shown in Figure 7.Comprise filament and add the testing circuit 60 detection discharging currents of heat detection part or the electrical characteristic of voltage, heater current or voltage etc.As the control circuit 8C of control assembly, except carrying out the lighting the control of control change device 40, can also carry out the control of filament heating circuit 47 according to dim signal.For symbol A, B, C, A is the test point of modulating voltage, and B is the test point of lamp current, and C is the test point that filament adds heat.In current detecting point, can use to the voltage decline of heater circuit 47 and resonant circuit 43 and can ignore such small resistance component etc.
The control of filament heating circuit 47 gives to add with the corresponding filament of light modulation degree the desired value of heat, becomes the control that adds the heat that kind of corresponding with it filament.In Fig. 7, the heat that adds that control is connected with heater circuit 47 is controlled the conduction period with switch 7, so that the detected value that the filament that is provided by testing circuit 60 adds heat is near the desired value of in control circuit 8C (perhaps, testing circuit 60), setting that adds heat.At this moment, filament adds the optimum value of heat generally according to the light modulation level decision that gives with dim signal, even the spy of technology opened 2005-235619 communique etc. in the past, also control circuit is so that can provide and the corresponding heater current value of light modulation level.But in the technology of example in the past, the situation that in fact filament reaches optimum value can not feed back to control assembly and confirm.In addition, also to light the time different because of the kind of discharge lamp 3 and accumulation for the optimum value self of filament heating, do not carry out the control that they considerations are carried out.
For example, when judging that from the magnitude of current that flow into discharge lamp 3 terminals filament adds under the situation of heat, the upper limit that adds heat that produces according to the discharge lamp kind, lower limit different as shown in Figure 6.For example; At control circuit 8C (perhaps; Testing circuit 60) circuit one side, the target that is set in the FHF32 lamp adds heat, and if be set near the lower limit of Fig. 6 for power saving; Then as drop among the FLR40 of the discharge lamp of same 40W output and the FL40 become under the lower limit separately be set to filament heat too small, the short lifeization of guiding discharge lamp.In addition, give zone that best filament adds heat in 3 kinds of whole kinds in Fig. 6, enumerating because grid part in the drawings, so the optimization in the gamut of the lamp current Il that can not carry out in light modulation.Equally, the for example such long accumulation in 1000 hours that surpasses in discharge lamp is lighted the process of time because promote the loss of the emission of filament, so light the characteristic of heating of length filament of time because of accumulation different.Therefore, even same discharge lamp also need confirm to add the desired value of heat according to the time of lighting of accumulation.
Thereby; In this execution mode, it is characterized in that: the parts of inferring of time are lighted in judgement part or accumulation that the discharge lamp kind is installed in lighting apparatus for discharge lamp, and control filament heating circuit 47 is so that become the desired value that adds heat of lighting corresponding filament of time with discharge lamp kind and accumulation.
The judgement part of relevant discharge lamp kind is as shown in Figure 8, is provided with through using control circuit 8C such as external setting-up switch can know the parts of the kind of discharge lamp 3.In Fig. 8, the example (black is set point) of the toggle switch 61 of expression setting 0 or 1.At this, though represent 2 toggle switch, if increase figure place then the kind of corresponding discharge lamp can be with a figure place value that 2 companies take advantage of.As shown in Figure 8ly set with the kind corresponding switch of discharge lamp A, B, C through carrying out, can correspondingly set the desired value that filament adds heat with the discharge lamp kind from the outside.And the judgement part of discharge lamp kind is not limited to this, and the situation etc. that certain qualification arranged when the discharge lamp kind down also can be through detecting and the judgements such as (being called modulating voltage) of the corresponding discharge lamp voltage of caliber.
Light inferring of time for accumulation, know that filament voltage in good grounds the lighting knows the some progress method of the loss situation of filament.In addition, also know widely in control circuit according to the request of initial illumination revisal or the outer method that possesses the measurement component of accumulating the time of lighting.Utilize them to set and accumulate the desired value that corresponding filament of the time of lighting adds heat.
If adopt this execution mode,, can prevent the short lifeization and early stage melanism of discharge lamp then through also carrying out the optimization that filament adds heat when the discharge lamp light modulation.The accumulation time of lighting according to light modulation level, discharge lamp kind or discharge lamp can be set the desired value that filament adds heat, can carry out the further optimization that filament adds heat.
[the 5th execution mode]
With reference to Fig. 9 to Figure 11 the 5th execution mode of the present invention is described.Fig. 9 is the control flow of the 5th execution mode of explanation lighting apparatus for discharge lamp of the present invention, and Figure 10 and Figure 11 explain diverse relatively discharge lamp, and filament adds the figure of the control of heat.The formation of lighting apparatus for discharge lamp is because the same with Fig. 7, so with reference to the circuit diagram explanation of Fig. 7.
In Fig. 7, to use lamp device 40 be converter is transformed to interchange with the output voltage of continuous-current plant 1, can obtain the discharge voltage of high frequency through series resonant circuit 43.Filament heating circuit 47 is as shown in Figure 7, has to use transformer that electric energy is sent to the formation of filament, controls the on/off of heating currents or voltage with switch 7.Through the control during this switch 7 logical, can control the heat that adds of filament.
The testing circuit 60 of Fig. 7 detects the electric current or the voltage of discharge lamp, the electrical characteristic of heater current or voltage etc.The conducting duty ratio of the switch 7 that control circuit 8C control is connected with heater circuit 47, the feasible filament that obtains based on the detected value of testing circuit 60 add heat and be set in the difference that target in the control circuit 8C adds heat becomes minimum.
Fig. 9 is the figure of expression control flow.The conducting duty ratio of the switch that control circuit 8C control is connected with heater circuit 47 is so that use the filament that the heat testing circuit obtains of adding of testing circuit 60 to add heat and be minimum according to the desired value that adds heat that the main cause of time etc. tries to achieve is lighted in the accumulation of the kind of dim signal, discharge lamp, discharge lamp in control circuit 8C difference.In Fig. 9, the reference point (Ref) as error amplifier 62 gives the desired value that above-mentioned filament adds heat, and the difference that is controlled to and uses testing circuit 60 detected filaments to add the detected value of heat is minimum.
Being formed in of Fig. 9 detects and adds heat and implement adding Guaranteed that the difference of heat feeds back with target, promptly can be the formation that hardware constitutes the calculation process that also can be enforcement software.In addition; At this, because use general FEEDBACK CONTROL, so as Error=(desired value)-(detected value); Also can use and be controlled to (controlled quentity controlled variable)=Kp*Error+Ki ∫ Error*dt (wherein; Kp, Ki are the coefficients that gives feedback oscillator, and * representes the meaning of multiplication) PI control etc., general feedback method is controlled.
For example, consideration adds the method for optimizing of heat based on the filament of the terminal inflow current of discharge lamp.At this, so-called terminal is meant the terminal at the filament two ends on the end that is provided in discharge lamp.In Figure 10 and Figure 11, transverse axis is got lamp current Il, and the longitudinal axis is got the quadratic sum ILH of terminal inflow current
2+ ILL
2Discharge lamp A, B are different types of discharge lamps.ILH is the terminal inflow current that in the filament two ends, flows into lamp current Il one side, and ILL is the terminal inflow current that Il does not flow into a side.At this moment, as the discharge lamp A of Figure 10 and Figure 11, B, can draw and the corresponding score of the kind of discharge lamp.As desired value shown in Figure 9, obtain the i.e. (ILH of such score
2+ ILL
2The target function of)=a*Il+b (a, b are constants, and * is a multiplication).At this, (ILH
2+ ILL
2) with filament to add heat corresponding.Obtaining (ILH
2+ ILL
2) detection limit after; Desired value as Fig. 9; Through giving to carry out Control and Feedback at the target function shown in Figure 10 and Figure 11, the detected value (measured value) that the filament of then in Figure 10 and Figure 11, representing with black circle adds heat is score by FEEDBACK CONTROL to suitable value.Figure 10 representes the appearance to the FEEDBACK CONTROL of discharge lamp A, and Figure 11 representes the appearance to the FEEDBACK CONTROL of discharge lamp B.In different types of 2 discharge lamp A, B FEEDBACK CONTROL separately, know the recruitment that adds heat difference for every kind of discharge lamp kind as controlled quentity controlled variable.
If adopt this execution mode, the heating of filament in the time of then can preventing the discharge lamp light modulation excessive/too small, can prevent the short lifeization of discharge lamp, the early stage melanism of tube wall.Carry out FEEDBACK CONTROL through filament being added heat, can carry out control with the actual heater block that adds the heat balance.Can set with the light modulation degree be when the corresponding best filament of lamp current adds the desired value of heat, can set the desired value of having considered to add heat because of the filament that the best of the heating quantitative changeization that the length of time causes is lighted in the kind of discharge lamp and accumulation.
[the 6th execution mode]
With reference to Figure 12 to Figure 15 the 6th execution mode of the present invention is described.Figure 12 is the circuit diagram of the 6th execution mode of expression lighting apparatus for discharge lamp of the present invention.Figure 13 amplifies the key diagram that glower end electron current that the part of Figure 12 representes detects; Figure 14 is that the filament of variation of the relative lamp current of expression adds the upper limit of heat and the figure of lower limit, and Figure 15 is illustrated in the series connection of 2 lamps to add the figure of position that heat detects the lamp current test point of usefulness in lighting.
The formation of lighting apparatus for discharge lamp shown in Figure 12 is the same with Fig. 7.Add the detection part of heat as filament, have utilize lamp current Il and heater current If's and method.In Figure 12, add as filament heat detect Il with If's and the time, be illustrated on the filament of electronegative potential one side (stable potential one side) in the lighting apparatus for discharge lamp, detection Il and If's and example.
In Figure 12, be that converter is transformed to interchange with continuous-current plant 1 with lamp device 40, the voltage of high voltagehigh frequency is provided to discharge lamp via series resonant circuit 43.In addition, the filament heating is carried out with heater circuit 47.Control circuit 8C comes control change device 40 according to dim signal and to discharge lamp 3 light modulations the time, through the switch 7 of control heater circuit 47, is controlled at best filament and adds heat.
Shown in figure 12, add the testing circuit of heat as filament, be provided with the testing circuit of Il+If.Through detecting Il simultaneously, can from the detected value of Il+If, calculate If.Among the test point a in the filament of electronegative potential one side (stable potential one side) of Figure 12; Obtain Il and If with; And the electric current through the test point a on the filament that detects potential minimum with; If this detected value surmounts lower limit, then be estimated as in filament (filament of high potential one side in Figure 12) in addition and all become the heat that adds above lower limit, the optimization control of filament becomes easy.Detection for the Il among the test point b can be described as equally.In the detection of the detection of Il+And if Il, the small resistance component that for example can use the voltage of relative heater circuit 47, resonant circuit 43 to descend can to ignore degree etc.
Best filament adds heat and uses the terminal inflow current of the discharge lamp of that kind shown in Figure 13 can the scope of the oblique line of Figure 14 be given as optimum range.In Figure 13, discharging current Il then gives with ILH=Il+If if be not diverted to the design of diagram heater circuit 47 1 sides, gives with ILL=If.At this moment, if with the ILH of relative Il
2+ ILL
2Value be controlled at Figure 14 be limited to (zone of oblique line) between the upper limit down, then the filament in the discharge tube lighting adds heat and is optimized.If suppose to detect the lamp current Il that relative light modulation level is set, see ILH as long as then add the heat detection
2+ ILL
2Get final product.At this, detect Il+If with, in FEEDBACK CONTROL, use.
Because can be write as ILH
2+ ILL
2=(Il+If)
2+ If
2So, if hypothesis Il+If=a then can be write as ILH
2+ ILL
2=2a
2-2aIl+Il
2Deng.Therefore, give ILH as the a=Il+If of detected amount and the function of Il
2+ ILL
2, make and to be worth between upper and lower bound as long as set the controlled quentity controlled variable of heater circuit 47.Can obtain the optimum value that filament adds heat while simplifying the testing circuit 60A that filament adds heat thus.
The detection that filament adds heat generally can detect through in filament arbitrarily, detecting Il+If.Shown in figure 15, to the discharge lamp of load is arranged to 2, the situation of being arranged to connect and lighting can detect Il+If (test point 1) to the filament of high potential one side, also can detect (test point 3) to the filament of electronegative potential one side.In addition, on the position of the current potential of centre, also can detect (test point 2).But; Particularly when the light modulation of discharge lamp; Because occur from of the influence of high potential one side through the electric current of voxel (this voxel is the capacity that swims that between high potential one side and electronegative potential one side, exists) leakage; So the size of the discharging current that relatively is measured in high potential one side reduces in the size of the discharging current that low current one side is measured to, electronegative potential, the discharging current that heating is made contributions for filament is more little.Therefore, detect the value of the test point 3 of potential minimum, surpass lower limit shown in Figure 14, in whole filaments, can guarantee that the filament that does not drop to below the lower limit shown in Figure 14 adds heat through being controlled to this detected value.Thus, can prevent in any filament because of adding the short lifeization of the discharge lamp that shortage of heat causes.
And; That kind for example shown in figure 15 is when under the situation of a plurality of (being 2 in the drawings) discharge lamp that is connected in series between high potential one side and electronegative potential one side; Control assembly has the ratio that each filament in a plurality of filaments adds heat in advance; The detection part that adds heat can be implemented the detection that filament adds heat in the filament arbitrarily of discharge lamp, control assembly can use the detection position of the detection part that adds heat and above-mentioned ratio to calculate the heat that adds of setting filament.This is because of following reason.Promptly; When under the situation of a plurality of discharge lamps that are connected in series between high potential one side and electronegative potential one side; Add inferring of heat as each filament; If detect the lamp current of high potential one side and electronegative potential one side, then can roughly carry out the inferring of leakage current, inferring based on the lamp current in its each filament.Then, use inferring of lamp current in this each filament to carry out each filament and add inferring of heat, possess its ratio in advance.If so; Aim under the situation that adds heat according to electronegative potential one side if for example want; Then as long as detect one of them thereafter according to ratio control, if just perhaps detect one of them then other filament add heat through according to the variable scope that can be arranged to the best of ratio separately.
If adopt this execution mode, then the heating of the filament through to the discharge lamp light modulation time is carried out optimization and then can be prevented the short lifeization of discharge lamp, early stage melanism.The enough simple circuit of ability constitute the filament that detects discharge lamp and add heat.Though can detect the heat that adds of discharge lamp filament for each filament; But on the filament of electronegative potential one side (stable potential one side), pass through to detect Il+If; If this detected value surpasses lower limit; Then in filament in addition all above lower limit, add heat and can carry out optimization through giving best filament.Thereby, even the test point that filament is added heat is defined as 1 point, also can carry out the thermal control that adds less than the short lifeization of discharge lamp.In addition; When under the situation of a plurality of discharge lamps that are connected in series between high potential one side and electronegative potential one side; The inferring of the lamp current of use in each filament carried out each filament and added inferring of heat; Possess this ratio in advance, if detect one of them filament add heat, then other filament adds heat and can be arranged to best heating weight range through correspondingly controlling with each ratio or changing.
[the 7th execution mode]
With reference to Figure 16 to Figure 18 the 7th execution mode of the present invention is described.Figure 16 is the circuit diagram of the 7th execution mode of expression lighting apparatus for discharge lamp of the present invention.Figure 17 is a circuit diagram of the impedance among Figure 16 being arranged to capacitor, and Figure 18 is the figure that is illustrated among Figure 17 the heater current under the situation of control respectively that switch to filament carries out break-make.
In Figure 16; Lamp device 40 has the series resonant circuit 43 of a pair of switching device that is connected in series each other and the switch that this switching device is provided output (though symbol 43 is not shown; But the same symbol 44,45,46 that includes with Fig. 7); The formation of heater block is through non-power supply one side that the resonating capacitor 46 with series resonant circuit 43 is arranged in series in a pair of filament of discharge lamp 3 this filament to be heated; Control assembly use impedance Z f (Zf is Zf1, at least one side of Zf2) and switch SW f (SWf is at least one side of SWf1, SWf2) increase and decrease the control of the electric current that flows through filament, can control the heat that adds of filament thus.If compare with the structure of Fig. 7; Then in Figure 16; Remove the heater block 47 of the preheating transformer that has used Fig. 7, resonating capacitor 46 is arranged in series in non-power supply one side of a pair of filament of discharge lamp 3, the series circuit of also be connected in parallel impedance Z f and switch SW f at the two ends of each filament.
This execution mode, a pair of MOS type FET41,42 that will be connected in series each other as the converter of the half-bridge shape of lamp device 40 is connected between the output of continuous-current plant 1, with the parallel connection relation series resonant circuit 43 is set for a side FET42.Series resonant circuit 43 comprise direct current cut-off capacitance device 44, current limliting with and the inductor 45 of resonance usefulness (below, abbreviate Lr as) and resonance with capacitor 46 (below, abbreviate Cr as).
Using lamp device 40 is that converter is transformed to interchange with continuous-current plant 1, uses series resonant circuit 43 to give the high voltagehigh frequency electric energy to discharge lamp 3.Be utilized in the high voltagehigh frequency that takes place on the Cr two ends and light discharge lamp 3.At this moment, the filament of discharge lamp 3 because with connect with Cr, so be heated through the alternating current that flows through Cr.
Thereby the Cr of the heater block configured in series series resonant circuit 43 of this execution mode and the filament of discharge lamp 3 heat this filament.
In addition, in output, flow through the electric current of filament, have the function that adds heat of control filament through increase and decrease according to dim signal control change device 40 as the control circuit 8D of control assembly.About symbol A, B, C, A is the test point of modulating voltage, and B is the test point of lamp current, and C is the test point that filament adds heat.On current detecting point, can use to the voltage decline of resonant circuit 43 grades and can ignore such small resistance component etc.
In the formation of Figure 16, as Fig. 7 and shown in Figure 12 suppress the electric current that leaks from high potential one side via parasitic capacitance, in two filaments, except lamp current, flow through electric current as the filament heating current via resonating capacitor Cr.
The control assembly that comprises above-mentioned control circuit 8D comprises: and the filament of discharge lamp 3 is connected in parallel and the impedance Z f of resonating capacitor Cr configured in series; With this impedance Z f configured in series, the switch SW f of the electric current that control flows into; Through this switch SW f is carried out break-make, the filament that adds heat of control filament adds heat control assembly (part of control circuit D8).
If with the light modulation of the FREQUENCY CONTROL discharge lamp 3 of converter 40, then can also control flows cross the electric current of Cr.Thus, if adding heat, light modulation then filament as one man change with the increase and decrease of flowing through the magnitude of current of Cr.In this mode, the electric current of the filament of Cr and discharge lamp is flow through in the decision of the impedance composition of the Cr that frequency f during according to light modulation and the value of Cr give in order to 1/2 π fCr.Therefore, through come the frequency of control change device with light modulation, the electric current that flows through filament changes.As to obtain this heater current be that the best adds and need give the value of Cr, the frequency of being controlled etc. the heat.
But, in fact, even the value, control frequency etc. of decision Cr as stated also produce the actual heat that adds and leave with best the well-behaved of heat that add.Therefore, in this execution mode, in testing circuit 60, it is characterized in that: detect discharge lamp current/voltage electrical characteristic and filament add heat, according to the break-make of this value frequency, switch SW f1 and SWf2 of control change device in control circuit.In the filament of discharge lamp, dispose impedance Z f parallelly connectedly.At switch SW f is in the closing state, and filament only determines heater current with Cr as stated.On the other hand, if switch SW f is arranged to out, then because occur in the electric current that impedance Z f goes up shunting, so can reduce the electric current that flows through filament.Like this in Figure 16, because carry out the open and close of switch SW 1 and SW2, so can control the heat that adds of filament.Add the desired value of heat and light the time decision, like the detected conducting duty ratio of controlling SWf1 and SWf2 adding heat and desired value being consistent by the kind of light modulation level, discharge lamp, accumulation.
Figure 17 representes to have given capacitor (Cf1, example Cf2) as the impedance composition that parallel connection is configured on the filament.If SWf1 is arranged to out, then Cf1 and filament become the state of being connected in parallel.Therefore, add the electric current of pining for using at filament and be diverted to Cf1 one side and filament one side.Thus, can control filament and add heat.For example, the resistance value of the filament of discharge tube lighting etc. generally is about 10 Ω.In contrast, if ignition frequency f is arranged to 50kHz, Cf1=0.47 μ F, then because become 1/2 π fCf1=6.77 Ω, so be in the rank of the resistance value of filament.
Figure 18 diagram is by the effect of the control generation of SWf.When the SWf conducting when closing relatively, the electric current that flows through filament reduces.Thereby, through the conduction period of control switch, be controlled to be the state of the centre of electric current that when conducting, flows through filament and the electric current that when ending, flows through filament, add heat with this absolute value control.
In addition, in Figure 17, giving the example of capacitor as the impedance of parallelly connected configuration with filament, but can be inductor, also can be the combination of capacitor and inductor.Though can parallel connection dispose resistance components, because consume effective electric energy, so preferably constitute with capacitor or inductor.
If as stated with the current flow heats filament that flows through resonating capacitor Cr,, can access the advantage that uniform filament adds heat so on high potential one side and electronegative potential one side, also have because can ignore from the effect of the electric current of high potential one side leakage.
If adopt this execution mode, then in discharge lamp,, can prevent the short lifeization of discharge lamp, early stage melanism through controlling the heat that adds of filament best.Use adding of filament through the electric current that will flow through resonating capacitor and pine for, the influence of the leakage current in the time of can suppressing the discharge lamp light modulation can suppress to add the discrete of heat accordingly with the current potential (high potential one side, electronegative potential one side) of filament.In addition, even use in the mode that adding of filament pine for, can realize that also filament adds the control of heat at the electric current that will flow through resonating capacitor like this.
And then; If adopt this execution mode; Because the formation of the heater block of heat filament is arranged to remove the formation of the loss of leakage current; So how can in the filament arbitrarily of discharge lamp, implement the detection that filament adds heat regardless of high potential one side, electronegative potential one side lamp silk, can expand the degree of freedom of discharge lamp circuit design.
Below, an execution mode of lighting device of the present invention is described with reference to Figure 19.Figure 19 is the stereogram of an execution mode of expression lighting device of the present invention.Under the situation of Figure 19, lighting device is the ligthing paraphernalia of ceiling mount type.Symbol 70 is ligthing paraphernalia main bodys, and 71 are arranged on the socket on the ligthing paraphernalia main body 70, the 72nd, and reflecting plate, 73 are mounted in the discharge lamp of the hot cathode type on the socket 71, and the 74th, be built in the lighting apparatus for discharge lamp in the ligthing paraphernalia main body 70.Use the device of explanation in one of the 1st to the 7th execution mode as lighting apparatus for discharge lamp.
In the lighting device that constitutes like this, can carry out the filament heating of discharge lamp 73 all the time aptly, can seek short lifeization and prevent and the alleviating of energy loss.
And, the application with on January 25th, 2006 spy in japanese publication be willing to 2006-016653 number as the application of the basis of claim of priority, above-mentioned disclosed content is quoted in the scope of present specification, claim.
Claims (9)
1. lighting apparatus for discharge lamp is characterized in that comprising:
Exporting variable lamp device, is the discharge lamp that high frequency voltage is lighted the hot cathode type with the output transform of continuous-current plant;
Export variable heater block, be used to heat the filament of above-mentioned discharge lamp;
Detection part is used to detect the heat that adds of above-mentioned filament;
Control assembly; Storage in advance adds heat with the corresponding filament of light modulation degree of above-mentioned discharge lamp; When correspondingly controlling the output of above-mentioned lamp device with dim signal; Control the output of above-mentioned heater block so that the above-mentioned filament that adds heat and become storage in advance of the filament that detects with above-mentioned detection part adds heat, wherein
Above-mentioned control assembly possesses the parts of the judgement of the kind of carrying out above-mentioned discharge lamp, and the result of determination calculating filament of accordinging to the kind of above-mentioned light modulation degree and discharge lamp adds heat.
2. lighting apparatus for discharge lamp according to claim 1 is characterized in that:
The setting of the kind of above-mentioned discharge lamp is carried out with the code that mechanical switch sets through the kind according to employed discharge lamp.
3. lighting apparatus for discharge lamp is characterized in that comprising:
Change the continuous-current plant of output voltage values;
Converter has the series resonant circuit of pair of switches device that is connected in series each other and the switch that this switching device is provided output, and the output voltage of above-mentioned continuous-current plant is transformed to the discharge lamp that high frequency voltage is lighted the hot cathode type;
Heater block is exported through the switch of above-mentioned converter and to be loaded, to the filament heating of above-mentioned discharge lamp;
Detection part is used to detect the heat that adds of above-mentioned filament;
Control assembly; Storage in advance adds heat with the corresponding filament of light modulation degree of above-mentioned discharge lamp; When having set the light modulation degree, change the output voltage values of above-mentioned continuous-current plant so that the above-mentioned filament that the filament that detects from above-mentioned detection part adds heat becomes storage in advance adds heat, and change the switching frequency of above-mentioned converter so that the light output of above-mentioned discharge lamp becomes the light modulation degree through setting with dim signal; Wherein
Above-mentioned control assembly possesses the parts of the judgement of the kind of carrying out above-mentioned discharge lamp, and the result of determination calculating filament of accordinging to the kind of above-mentioned light modulation degree and discharge lamp adds heat.
4. lighting apparatus for discharge lamp according to claim 3 is characterized in that:
The setting of the kind of above-mentioned discharge lamp is carried out with the code that mechanical switch sets through the kind according to employed discharge lamp.
5. according to each the described lighting apparatus for discharge lamp in the claim 1 to 4, it is characterized in that:
Above-mentioned detection part carries out the detection that filament adds heat in adding the minimum filament of heat in a plurality of filaments of above-mentioned discharge lamp.
6. according to each the described lighting apparatus for discharge lamp in the claim 1 to 4, it is characterized in that:
Above-mentioned control assembly has the ratio that each filament in a plurality of filaments adds heat in advance, and above-mentioned detection part is implemented the detection that filament adds heat in the filament arbitrarily of above-mentioned discharge lamp,
Above-mentioned control assembly uses the detection position of above-mentioned detection part and the heat that adds that above-mentioned ratio calculated and set filament.
7. lighting apparatus for discharge lamp according to claim 5 is characterized in that:
Above-mentioned lamp device has the series resonant circuit of pair of switches device that is connected in series each other and the switch that this switching device is provided output,
Above-mentioned heater block is arranged in series in non-power supply one side of a pair of filament of above-mentioned discharge lamp through the resonating capacitor with above-mentioned series resonant circuit, heat this filament,
Above-mentioned control assembly flows through the electric current of above-mentioned filament through increase and decrease, controls the heat that adds of above-mentioned filament.
8. lighting apparatus for discharge lamp according to claim 6 is characterized in that:
Above-mentioned lamp device has the series resonant circuit of pair of switches device that is connected in series each other and the switch that this switching device is provided output,
Above-mentioned heater block is arranged in series in non-power supply one side of a pair of filament of above-mentioned discharge lamp through the resonating capacitor with above-mentioned series resonant circuit, heat this filament,
Above-mentioned control assembly flows through the electric current of above-mentioned filament through increase and decrease, controls the heat that adds of above-mentioned filament.
9. lighting device is characterized in that possessing:
The ligthing paraphernalia main body;
Be installed in the discharge lamp of the hot cathode type on this ligthing paraphernalia main body;
Light the claim 1 or the 3 described lighting apparatus for discharge lamp of this discharge lamp.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2006016653 | 2006-01-25 | ||
| JP016653/2006 | 2006-01-25 | ||
| PCT/JP2007/051154 WO2007086455A1 (en) | 2006-01-25 | 2007-01-25 | Discharge lamp operating device and illuminator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101356861A CN101356861A (en) | 2009-01-28 |
| CN101356861B true CN101356861B (en) | 2012-06-06 |
Family
ID=38309243
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007800013902A Expired - Fee Related CN101356861B (en) | 2006-01-25 | 2007-01-25 | Discharge lamp lightening device and illuminator |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP4985408B2 (en) |
| CN (1) | CN101356861B (en) |
| WO (1) | WO2007086455A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010198785A (en) * | 2009-02-23 | 2010-09-09 | Panasonic Electric Works Co Ltd | High pressure discharge lamp lighting device, lighting apparatus, and lighting system |
| CN102458027B (en) | 2010-10-22 | 2014-05-07 | 台达电子工业股份有限公司 | Control method for lighting circuit and applicable lighting circuit |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6081077A (en) * | 1997-07-02 | 2000-06-27 | Magnetek | Universal power supply for discharge lamps |
| CN1457623A (en) * | 2000-05-12 | 2003-11-19 | O2米克罗国际有限公司 | Integrated circuit for lamp heating and dimming control |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2576585Y2 (en) * | 1992-02-19 | 1998-07-16 | 松下電工株式会社 | Discharge lamp lighting device |
| JPH0822893A (en) * | 1994-07-07 | 1996-01-23 | Canon Inc | Fluorescent lamp dimmer |
| JPH11238586A (en) * | 1998-02-24 | 1999-08-31 | Matsushita Electric Works Ltd | Discharge lamp lighting device |
| JP2005510834A (en) * | 2001-11-23 | 2005-04-21 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | Discharge lamp electrode heating device |
| JP3801034B2 (en) * | 2001-11-30 | 2006-07-26 | 松下電工株式会社 | Discharge lamp lighting device |
| JP2004178943A (en) * | 2002-11-26 | 2004-06-24 | Matsushita Electric Works Ltd | Discharge lamp lighting device |
| JP2005235619A (en) * | 2004-02-20 | 2005-09-02 | Mitsubishi Electric Corp | Discharge lamp lighting device |
-
2007
- 2007-01-25 CN CN2007800013902A patent/CN101356861B/en not_active Expired - Fee Related
- 2007-01-25 WO PCT/JP2007/051154 patent/WO2007086455A1/en active Application Filing
- 2007-01-25 JP JP2007555993A patent/JP4985408B2/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6081077A (en) * | 1997-07-02 | 2000-06-27 | Magnetek | Universal power supply for discharge lamps |
| CN1457623A (en) * | 2000-05-12 | 2003-11-19 | O2米克罗国际有限公司 | Integrated circuit for lamp heating and dimming control |
Non-Patent Citations (4)
| Title |
|---|
| JP特开2003-168582A 2003.06.13 |
| JP特开2004-158211A 2004.06.03 |
| JP特开2004-178943A 2004.06.24 |
| JP特开2005-235619A 2005.09.02 |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2007086455A1 (en) | 2007-08-02 |
| JP4985408B2 (en) | 2012-07-25 |
| JPWO2007086455A1 (en) | 2009-06-18 |
| CN101356861A (en) | 2009-01-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5519289A (en) | Electronic ballast with lamp current correction circuit | |
| US7880397B2 (en) | Method for starting a discharge lamp using high energy initial pulse | |
| EP1057382B1 (en) | High frequency electronic ballast for multiple lamp independent operation | |
| US5910709A (en) | Florescent lamp ballast control for zero -voltage switching operation over wide input voltage range and over voltage protection | |
| CN101513129A (en) | Discharge lamp operation device and illumination device | |
| CN100466878C (en) | Igniter device for discharge lamp | |
| US20050067973A1 (en) | Device for heating electrodes of a discharge lamp | |
| CN102164440B (en) | Lighting device and illumination fixture using thereof | |
| EP1604546A2 (en) | High intensity discharge lamp ballast circuit | |
| US8125154B2 (en) | Automatic lamp detection method and optimal operation for fluorescent lamps | |
| CN105282916A (en) | Lighting circuits, luminaries and methods compatible with phase-cut mains supplies | |
| US8129920B2 (en) | Discharge lamp ballast and fixture with controlled preheating | |
| CN101356861B (en) | Discharge lamp lightening device and illuminator | |
| JP4241358B2 (en) | Discharge lamp lighting device, lighting fixture and lighting system | |
| JP3801034B2 (en) | Discharge lamp lighting device | |
| JP4120211B2 (en) | Discharge lamp lighting device | |
| US8896213B1 (en) | Adaptive lamp warm up control for dimming ballast based on lamp impedance sensing | |
| JP3341370B2 (en) | Dimming discharge lamp lighting device | |
| KR100630416B1 (en) | New dimmable electronic ballasts isolation circuit | |
| JP4140219B2 (en) | Discharge lamp lighting device | |
| Pappis et al. | Self-oscillating electronic ballast with universal input voltage range | |
| US20140210371A1 (en) | Digitally controlled electronic ballast with anti-striation control and method of operation thereof | |
| JP2008147071A (en) | Discharge lamp lighting device, and luminaire | |
| TWI299640B (en) | High intensity discharge lamp ballast circuit | |
| CN104041192B (en) | Electric ballast |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120606 Termination date: 20150125 |
|
| EXPY | Termination of patent right or utility model |