CN101448355A - Discharge lamp lighting device - Google Patents
Discharge lamp lighting device Download PDFInfo
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- CN101448355A CN101448355A CN 200810178922 CN200810178922A CN101448355A CN 101448355 A CN101448355 A CN 101448355A CN 200810178922 CN200810178922 CN 200810178922 CN 200810178922 A CN200810178922 A CN 200810178922A CN 101448355 A CN101448355 A CN 101448355A
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Abstract
The invention provides a discharge lamp lighting device. The inverter circuit 12 is feedback-controlled by a substantial current flowing into the discharge lamp FL, which is detected by the current detecting means 24. A high starting voltage is supplied to the discharge lamp with the operation frequency lowered by the control circuit 16 after the end of a preheating action. The inverter circuit is controlled so that the current of the discharge lamp becomes a desired current value as soon as the current detecting means detects the current substantially flowing into the discharge lamp. The discharge lamp FL can be prevented from being instantaneously brightly lit without separately providing any structure for detecting lighting of the discharge lamp FL.
Description
Technical field
The present invention relates to make the discharge lamp ignition device of discharge lamp lighting.
Background technology
In the past, in discharge lamp ignition device, what use is the inverter circuit (inverter) of semibridge system (half bridge) for example, and between the output of this inverter circuit, connecting the LC (inductance-capacitance of have inductor (inductor) and capacitor (condenser), inductance capacitance) resonant circuit (resonant circuit) makes the discharge lamp starting, lights a lamp under the resonance effect of this LC resonant circuit.
In addition, have at discharge lamp ignition device under the situation of the function of discharge lamp being carried out light modulation, particularly in order when carrying out degree of depth light modulation, can stably to carry out light modulation to discharge lamp, and the discharge voltage of discharge lamp and the electric current of inverter circuit output are detected, use these voltage, output currents after testing to come inverter circuit is carried out FEEDBACK CONTROL.
When using in the zone of the resonance frequency when operating frequency is non-loaded greater than resonant circuit under the situation of this kind discharge lamp ignition device, when making the discharge lamp starting, control, so that temporary transient reduction of operating frequency made the starting voltage that is increased to regulation from the high frequency voltage of inverter circuit output, and make discharge lamp lighting, afterwards, make operating frequency return to the frequency of regulation.
Plant control at this point, open shown in the 2006-210267 communique as for example Japan Patent spy, by controlling organization the discharge voltage that is set in advance in discharge lamp detected near the starting voltage threshold voltage (threshold voltage) and the starting action is compared, when discharge voltage is higher than threshold voltage, be judged as discharge lamp and light a lamp.
Yet there are the following problems for described discharge lamp ignition device: must be provided with and be used for the discharge voltage of discharge lamp and threshold voltage are compared and detect the testing agency of lighting a lamp of the lighting state of discharge lamp, therefore make structure become complicated.
In addition, when the discharge voltage of discharge lamp and threshold voltage are compared, may not necessarily detect, therefore, also exist lamp current or lamp electric power moment to become big, the discharge lamp problem that moment lights a lamp brightly when starting in the moment that discharge voltage surpasses threshold voltage.
Summary of the invention
The present invention is developed in view of described problem, and its purpose is to provide a kind of discharge lamp ignition device, and it need not have complicated structure can prevent that just discharge lamp moment when starting from lighting a lamp brightly.
Discharge lamp ignition device of the present invention comprises: inverter circuit, utilize the action of switch element and direct voltage be converted to the high frequency voltage line output of going forward side by side; Resonant circuit has inductor and capacitor between the output that is connected in series in described inverter circuit, and carries out resonance corresponding to high frequency voltage; Discharge lamp is connected between the two ends of capacitor of described resonant circuit, and lights a lamp under the resonance effect of resonant circuit; Current detecting mechanism is detected the electric current that flows in fact in the described discharge lamp; Controlling organization, come the switch element of inverter circuit is carried out FEEDBACK CONTROL according to the detected electric current of described current detecting mechanism, the voltage that can not light a lamp with discharge lamp when preheating comes described discharge lamp is carried out preheating, and operating frequency is reduced and the high frequency voltage of the frequency of voltage when frequency is higher than preheating supplies to discharge lamp, and utilize current detecting mechanism to come the electric current that flows in fact in the discharge lamp is detected, and short-period described FEEDBACK CONTROL by each regulation, come inverter circuit is controlled, so that the electric current of discharge lamp becomes required current value.
With regard to discharge lamp, hot cathode type fluorescent lamp or high-pressure discharge lamp etc. are for example arranged, but be not limited thereto.
With regard to inverter circuit, so long as the action that can utilize field-effect transistor switch elements such as (field-effecttransistor) for example is converted to the high frequency voltage line output of going forward side by side with direct voltage, then can be the inverter circuit of semibridge system, full-bridge type arbitrary forms such as (full bridge).
The electric current that flows in fact in the what is called discharge lamp is meant, removes for example interior mobile interior electric current that flows of discharge lamps in addition such as leakage current (leakage current) of capacitive component.
What is called is utilized current detecting mechanism to come the electric current that flows in fact in the discharge lamp detected and is meant, reach the situation of the starting voltage of discharge lamp, thus, when reaching the starting voltage of discharge lamp, make electric current moment of discharge lamp reach required current value, thereby, even if make the discharge lamp lighting starting also can not allow human eye perceives arrive flash of light with low dimming ratio.
The short period of so-called regulation is meant, for example the cycle in current detecting mechanism each cycle that electric current is detected etc.
And, go up to come the switch element of inverter circuit is carried out FEEDBACK CONTROL according to peak phase (peak phase) by the detected electric current of current detecting mechanism at the voltage of discharge lamp, thus, discharging current according to discharge lamp comes inverter circuit is carried out FEEDBACK CONTROL exactly, utilize controlling organization that operating frequency is reduced and the high frequency voltage of the frequency of voltage when frequency is relatively higher than preheating supplies to discharge lamp, and utilize current detecting mechanism to come the electric current that flows in fact in the discharge lamp is detected, and in the short period of each regulation, inverter circuit is carried out FEEDBACK CONTROL so that the electric current of discharge lamp becomes required current value, like this, need not be provided with in addition and be used for can preventing just that to the structure that lighting a lamp of discharge lamp detected discharge lamp from lighting a lamp brightly in moment in when starting.
In addition, among the present invention be at least after the preheating release up to comprise when starting interior discharge lamp required light a lamp till process in, come the switch element of inverter circuit is carried out FEEDBACK CONTROL by the short cycle of controlling organization with regulation, and the desired value of the electric current after the preheating release is increased gradually, the light quantity of discharge lamp is increased gradually and become the required state of lighting a lamp with this.
And, at least after the preheating release in comprising when starting process till required the lighting a lamp of interior discharge lamp, come the switch element of inverter circuit is carried out FEEDBACK CONTROL by the short cycle of controlling organization with regulation, thereby can further improve the response of FEEDBACK CONTROL, and the desired value of the electric current after the preheating release is increased gradually, the light quantity that makes discharge lamp like this increases gradually and becomes the required state of lighting a lamp, with this make the discharge lamp lighting starting and don't can be before becoming the required state of lighting a lamp moment light a lamp brightly.
In addition, be in each cycle, to come the switch element of inverter circuit is carried out FEEDBACK CONTROL among the present invention by controlling organization.
And, by in each cycle, the switch element of inverter circuit being carried out FEEDBACK CONTROL, then can further improve the response of FEEDBACK CONTROL by controlling organization, make the discharge lamp lighting starting and don't can light a lamp brightly moment.
In addition, among the present invention, controlling organization is to make this discharge lamp starting when installing discharge lamp.
And, make discharge lamp starting when mounted, with this, also can when installing discharge lamp, make the starting of lighting a lamp gradually of this discharge lamp.
In addition, among the present invention, under the state that discharge lamp extinguishes when having imported dim signal by peripheral operation, controlling organization makes discharge lamp starting.
So-called peripheral operation is meant, for example the operation of the remote control light modulation operating mechanisms such as (remote control) used of light modulation.
And, when importing dim signal by peripheral operation, make discharge lamp starting under the state that discharge lamp extinguishes, make the discharge lamp starting of lighting a lamp gradually thus corresponding to peripheral operation.
In addition, among the present invention, controlling organization changes the followability of the light quantity of discharge lamp according to the variable quantity of the dim signal of being imported by peripheral operation.
And, change the followability of the light quantity of discharge lamp according to variable quantity by the dim signal of peripheral operation input, with this, can make sense of discomfort that light modulation brings to human eye a little less than.
In addition, among the present invention, controlling organization is lower than under the situation of setting at the variable quantity of the dim signal of being imported by peripheral operation, the current following that makes discharge lamp with the value of variable quantity correspondence therewith is to desired value, and under the situation of variable quantity more than or equal to setting of the dim signal of being imported by peripheral operation, the current following that makes discharge lamp with the set upper limit value is to desired value.
And, variable quantity at the dim signal of being imported by peripheral operation is lower than under the situation of setting, the current following that makes discharge lamp with the value of variable quantity correspondence therewith is to desired value, and under the situation of the variable quantity of importing dim signal by peripheral operation more than or equal to setting, the current following that makes discharge lamp with the set upper limit value is to desired value, can make thus discharge lamp light quantity follow only fast only slowly.
In addition, among the present invention, inverter circuit is the inverter circuit of semibridge system.
And, be the inverter circuit of semibridge system by making inverter circuit, can easily utilize controlling organization to carry out FEEDBACK CONTROL.
In addition, among the present invention, discharge lamp is a fluorescent lamp.
And, be fluorescent lamp by making discharge lamp, can provide a kind of can be moment in when starting bright not lighting a lamp and the fluorescent lamp of the starting of lighting a lamp.
Description of drawings
Fig. 1 is the circuit diagram of the discharge lamp ignition device of expression one embodiment of the present invention.
Fig. 2 be the expression discharge lamp ignition device discharge voltage, discharging current, with the oscillogram of the relation of leakage current.
Fig. 3 is illustrated in the discharge lamp ignition device detection method that the peak phase to discharge voltage detects, and Fig. 3 (a) is the oscillogram of discharge voltage and discharging current, and Fig. 3 (b) is the oscillogram that discharge voltage and discharging current are taken a sample.
Fig. 4 represents detection method, and Fig. 4 (a) is the oscillogram of discharge voltage and discharging current, and Fig. 4 (b) is the oscillogram that discharge voltage and discharging current are taken a sample.
Fig. 5 is the discharge voltage of representing discharge lamp ignition device, the oscillogram that detects the relation of voltage and leakage current composition.
Fig. 6 is the stereogram of the ligthing paraphernalia of applying charge lamp light source device.
Fig. 7 be the expression discharge lamp ignition device frequency, with the chart of the relation of the output voltage of the secondary side of resonant circuit and discharge voltage.
Fig. 8 is the oscillogram of relation of light quantity of discharge voltage, output current and the discharge lamp of expression discharge lamp ignition device, Fig. 8 (a) is the oscillogram of the envelope (envelope curve) of discharge voltage, Fig. 8 (b) is the oscillogram of the envelope of output current, and Fig. 8 (c) is the oscillogram of envelope of the light quantity of discharge lamp.
10: discharge lamp ignition device 11: booster circuit
12: inverter circuit 13: resonant circuit
16: control circuit 19: bleeder circuit
20: voltage detection mechanism 23: tie point
24: current detecting mechanism 27: testing circuit
41: appliance body 42: lamp socket
C1: smoothing capacitor C2: as the resonant capacitor of capacitor
R1, R2, R3: resistance D1, D2: diode
Q1, Q2: field-effect transistor FL: discharge lamp
I_C: leakage current composition VL, VL_det: detect voltage
Vs: starting voltage V1: high frequency voltage
IL: discharging current L: as the resonant inductor of inductor
REC: full-wave rectification element F0, fs, f1: frequency
Ts: sampling period v[o]～v[4], i[o]～i[5]: discrete magnitude
Embodiment
Below, referring to figs. 1 through Fig. 8 one embodiment of the present invention is described.
Fig. 1 is the circuit diagram of discharge lamp ignition device, Fig. 2 is the discharge voltage of expression discharge lamp ignition device, the oscillogram of the relation of discharging current and leakage current, Fig. 3 is illustrated in the discharge lamp ignition device detection method that the peak phase to discharge voltage detects, Fig. 3 (a) is the oscillogram of discharge voltage and discharging current, Fig. 3 (b) is the oscillogram that discharge voltage and discharging current are taken a sample, Fig. 4 represents detection method, Fig. 4 (a) is the oscillogram of discharge voltage and discharging current, Fig. 4 (b) is the oscillogram that discharge voltage and discharging current are taken a sample, Fig. 5 is the discharge voltage of expression discharge lamp ignition device, detect voltage, oscillogram with the relation of leakage current composition, Fig. 6 is the stereogram of the ligthing paraphernalia of applying charge lamp light source device, Fig. 7 is the chart of the relation of the output voltage of secondary side of expression frequency of discharge lamp ignition device and resonant circuit and discharge voltage, Fig. 8 is the discharge voltage of expression discharge lamp ignition device, the oscillogram of the relation of the light quantity of output current and discharge lamp, Fig. 8 (a) is the oscillogram of the envelope of discharge voltage, Fig. 8 (b) is the oscillogram of the envelope of output current, and Fig. 8 (c) is the oscillogram of envelope of the light quantity of discharge lamp.
As shown in Figure 1, in the discharge lamp ignition device 10, the input terminal that is connecting full-wave rectification (full wave rectification) the element REC that makes the source power supply voltage commutation on source power supply e is connecting the booster circuit (booster circuit) 11 that the direct voltage through rectification is boosted on the lead-out terminal of this full-wave rectification element REC.Connecting smoothing capacitor C1 between the lead-out terminal of booster circuit 11, also connecting simultaneously direct voltage is converted to the go forward side by side inverter circuit 12 of line output of high frequency voltage.This inverter circuit 12 is semi-bridge type inverters, and it has two field-effect transistor Q1, the Q2 as switch element that are being connected in series.The two ends of field-effect transistor Q2 are connecting the not shown capacitor and the resonant circuit 13 that are used for cutting off (cut) direct current, and this resonant circuit 13 has as the resonant inductor L of inductor and as the resonant capacitor C2 of capacitor.The discharge lamp FL of resonant capacitor C2 and for example hot cathode type fluorescent lamp etc. is connected in parallel.In addition, omitted the heating arrangements that the filament (filament) to discharge lamp FL heats in graphic.
In addition, connecting control circuit 16 on the grid of field-effect transistor Q1, Q2 (gate), this control circuit 16 is as the controlling organization that break-make (on-off) action of these field-effect transistors Q1, Q2 is controlled.
In addition, the two ends of resonant capacitor C2 are connecting the bleeder circuit (divider circuit) 19 that is made of a pair of resistance (resistance) R1, R2, constitute the voltage detection mechanism 20 that the voltage to discharge lamp FL detects by described bleeder circuit 19.
And then, the ground connection of the filament of the side of discharge lamp FL and resonant capacitor C2 one distolateral between, connecting by being used to carry out diode (diode) D1 of reverse blocking (reverse blocking) and the series circuit that resistance R 3 constitutes; And between the ground connection side of anode (anode) side of diode D1 and resistance R 3, be connected diode D2, thereby constitute current detecting mechanism 24, electric current on the tie point 23 of 24 couples of diode D1 of this current detecting mechanism and resistance R 3, that flow in fact in the discharge lamp FL, promptly removes the interior mobile electric current of discharge lamp FL the leakage current that flows in the capacitive component etc. (below be called output current) and detects.
These voltage detection mechanism 20 and current detecting mechanism 24 are connected in testing circuit 27.This testing circuit 27 has the function of the peak phase testing agency that the peak phase to voltage detection mechanism 20 detected voltages detects and the function of aligning gear that the phase place of voltage detection mechanism 20 detected voltages is proofreaied and correct with respect to the delay of the phase place of the discharge voltage of discharge lamp FL.In addition, also can make control circuit 16 have the function of peak phase testing agency and aligning gear.Here, the peak phase of so-called discharge voltage is meant, the maximum of sinuous discharge voltage or minimum value.
Aligning gear before discharge lamp FL lights a lamp during starts in obtain following correcting value, and after discharge lamp FL lights a lamp, come the delay of the phase place of voltage detection mechanism 20 detected voltages is proofreaied and correct according to this correcting value, described correcting value be peak phase to the detected voltage of peak phase testing agency with respect to current detecting mechanism 24 detected capacitive character compositions, promptly, the correcting value proofreaied and correct of the delay of the peak phase of the pairing voltage of the roughly zero crossing of the waveform of leakage current composition (zero cross) for example.
And, control circuit 16 has as for example PC (personal computer) or DSP (Digital Signal Processer, digital signal processor) the not shown microprocessor (microprocessor) of etc. control element, memory (memory), VCO (voltagecontrolled oscillator, voltage-controlled oscillator) etc., and have: inverter circuit 12 is carried out FEEDBACK CONTROL, so that detecting by peak phase testing agency with inferior function, and by the desired value of the output current on the peak phase of the corrected voltage of aligning gear (discharging current) near regulation by current detecting mechanism 24 detected inverter circuits 12; And, to exchange light level according to described desired value and control, this desired value is to set corresponding to the dim signal of importing by the peripheral operation of not shown light modulation operating mechanisms such as remote control.
As shown in Figure 2, on the position of the peak phase of discharge voltage VL,,, only discharging current IL is detected so can think that this leakage current composition I_C is 0 because leakage current composition I_C is the capacitive character composition.Output current be discharging current IL and leakage current composition I_C and, leakage current composition I_C is 0 on the position of the peak phase of discharge voltage VL, therefore, only discharging current IL is detected by on the peak phase of discharge voltage VL, output current being detected just available simple formation, and come field-effect transistor Q1, the Q2 of inverter circuit 12 are carried out FEEDBACK CONTROL according to this discharging current IL, thereby when degree of depth light modulation, also can stably light a lamp.In the present embodiment, be for example all to carry out FEEDBACK CONTROL in each cycle.
Then, with reference to Fig. 3 and Fig. 4, the detection method of utilizing peak phase testing agency to come the peak phase to discharge voltage to detect is described.
The detected value of discharge voltage and output current is analog signal (analog signal).In testing circuit shown in Figure 1 27 (perhaps control circuit 16), sampling mechanism is being set, is making the analog signal of discharge voltage and output current disperse in time and take a sample, to obtain the value on each sampling point.As this kind sampling mechanism, can be extensive use of the mechanism that constitutes by sampling/holding circuit (sample/holdcircuit) and A/D (analog/digital, analog/digital) transducer.When utilizing this kind mechanism to come analog signal to discharge voltage and output current to detect, discrete in time sampling value is become quantize.That is to say, the arithmetical organ that can pass through CPU (centralprocessing unit, central processing unit) etc. with analog signal conversion for carrying out the form of numerical operation.
The concept map of the situation that Fig. 3 (a) and Fig. 3 (b) expression is taken a sample to the analog signal of discharge voltage.In order to describe simply, discharge voltage VL and discharging current IL as the sampling object, and to be constituted and all can not become negative potential under the skew (off-set) arbitrarily.When each analog signal process sampling/holding circuit, A/D converter, can the discrete magnitude of being taken a sample with the sampling period Ts that sets with analog signal conversion.At this moment, the signal of discharge voltage VL, discharging current IL be expressed as respectively v[0], v[1], v[2] ..., i[0], i[1], i[2] ... the set of discrete magnitude.Because of having become, each value quantizes, so can implement comparison operation or arithmetical operation.In theory, when the frequency of the signal of the object of will taking a sample is made as fsignal, according to sampling theorem (samplingtheorem), if sampling frequency fs (=1/Ts) satisfy fs〉relation of 2 * fsignal, then can reappear original signal according to discrete magnitude, therefore can ancillary method reappears former detection signal by taking arbitrarily.
Here, owing to know the peak phase of discharge voltage VL, utilize the value of discretization as Fig. 3 (b).When shown in Fig. 3 (b), the value of sampling when being compared in turn, being satisfied v[0]＜v[1]＜v[2]＜v[3] v[4] v[5] relation.In view of the above, v[3 as can be known] be the peak phase of discharge voltage VL.Thereby the v[3 of the peak phase of discharge voltage VL as can be known ,] i[3 of pairing discharging current IL] the discharging current IL synchronous with the peak phase of discharge voltage VL be provided.Like this, to taking a sample and the peak phase of discharge voltage VL detected in the analog signal discreteness of discharge voltage VL ground, and the peak phase of discharge voltage VL synchronously detects output current therewith, thereby can easily only detect the discharging current IL except leakage current composition I_C.
In addition, Fig. 4 represents the detection case of the discharging current IL in the actual circuit structure.Fig. 4 (a) expression discharge voltage VL and be input to the input waveform of sampling/holding circuit of the output current of inverter circuit 12.Fig. 4 (b) expression is through the sampling result of A/D converter.And, will carry out the output current of the discharge voltage VL that detects and inverter circuit 12 after the rectification and waveform be input in sampling/holding circuit.In addition, when light modulation, as shown in Figure 4, output current with respect to the waveform of discharge voltage VL for advancing phase (lead phase).At this moment, can utilize arithmetical organ to calculate v[0]＜v[1]＜v[2]＜v[3] v[4], thereby phase place v[3 as can be known] be the peak phase of discharge voltage VL.The value of the output current of the inverter circuit 12 in this phase information is i[3] corresponding to the peak phase of discharging current IL.
Here, constitute:, make between the peak phase of the peak phase of discharge voltage VL and discharging current IL not have skew by the output current of discharge voltage VL and inverter circuit 12 is taken a sample simultaneously independently.As circuit structure, comparatively ideal is to have independently sampling/holding circuit, A/D converter at each detection limit, but also can be in having a circuit of sampling/holding circuit and A/D converter, the obtaining of the judgement by carrying out the peak phase of discharge voltage VL repeatedly, phase information, and the detection of the peak phase of discharging current IL and roughly side by side taking a sample.
In addition, also can be by in microprocessor, sampling/holding circuit being set and A/D converter is simplified circuit structure.
Then, Fig. 5 represents to utilize aligning gear to come the example that the phase place of voltage detection mechanism 20 detected voltages is proofreaied and correct with respect to the delay of the phase place of the discharge voltage of discharge lamp FL.
After power connection till discharge lamp FL lights a lamp during starts in, the discharge off electric current flows among the discharge lamp FL, but inverter circuit 12 vibrates, so export high-frequency high-voltage from resonant circuit 13 to discharge lamp FL.At this moment, the leakage current that flowing in the electric capacity that produces between discharge lamp FL and ligthing paraphernalia utilizes this leakage current to become to assign to proofread and correct.
Fig. 5 represents discharge voltage VL, voltage detection mechanism 20 detected detection voltage VL_det, the leakage current composition I_C in during starts respectively.When being that benchmark comes peak phase is detected or calculates, can obtain peak phase VL_det peak 1 to detect voltage VL_det.Relative therewith, when the peak phase that detects voltage VL_det is proofreaied and correct so that prestarting leakage current composition I_C when being 0, can obtain peak phase VL_det peak 2.Can obtain the correcting value of peak phase VL_det peak 1 → peak phase VL_det peak 2 thus.
The discharge lamp ignition device 10 of Gou Chenging can be applicable in the ligthing paraphernalia shown in Figure 6 in this way.This ligthing paraphernalia comprises the appliance body 41 that is disposing discharge lamp ignition device 10 and is positioned at these appliance body 41 two ends and lamp socket (socket) 42 of straight tube shape discharge lamp FL etc. is installed.
Secondly, come the effect of a described execution mode is illustrated with reference to Fig. 7 and Fig. 8.
When the peripheral operation that utilizes light modulation operating mechanism for example etc. makes the discharge lamp starting or when being installed to discharge lamp FL on the appliance body 41 etc., connect source power supply e and drive booster circuit 11, and, Drive and Control Circuit 16 and make field-effect transistor Q1, Q2 switch, thereby from inverter circuit 12 output high voltages.
Thereby, utilize high frequency voltage V1 to make the preheat curent that flowing in the filament of discharge lamp FL, to carry out the preheating of stipulated time.
After this preheating release, control circuit 16 makes the VCO action according to the voltage signal level from voltage detection mechanism 20, VCO output and described voltage signal level correspondent frequency signal.Subsequently, till VCO makes the frequency of the frequency signal of output be reduced near the resonance frequency f0 of resonant circuit 13.Therefore, the operating frequency of inverter circuit 12 rises to frequency f s, and thereupon, the high frequency voltage that is applied to discharge lamp FL rises to the voltage when being higher than preheating and becomes the starting voltage Vs of discharge lamp FL, thereby discharge lamp FL is lit a lamp.
At this moment, testing circuit 27 is to come the output current of discharge lamp FL is detected with the sequential of the peak phase of the discharge voltage VL of the calibrated mistake that does not comprise leakage current composition I_C, so, only discharging current IL is detected.Therefore, come the sequential that discharging current IL detects is become the sequential that high frequency voltage reaches starting voltage Vs by the current detecting mechanism 24 that is connected in described testing circuit 27, the discharge lamp FL sequential of lighting a lamp just, therefore, control circuit 16 comes VCO is supplied with the relative higher voltage level of described regulation with this sequential, with this, make the operating frequency of inverter circuit 12 rise to frequency f 1 according to high-frequency frequency signal, and make the high frequency voltage of being exported be reduced to the high frequency voltage V1 of regulation from described VCO output.That is to say, come sequential that discharging current IL is detected roughly consistent with the sequential that discharge lamp FL lights a lamp by current detecting mechanism 24, so, when utilizing this current detecting mechanism 24 to come discharging current IL detected, make electric current moment of discharge lamp FL become required low relatively current value.
Simultaneously, control circuit 16 increases the desired value of discharging current IL gradually, thereby discharge lamp FL crescendo is lit a lamp (fade in).Here, variable quantity at the dim signal that the peripheral operation by the light modulation operating mechanism sets is lower than under the situation of predefined setting, make discharging current IL follow desired value with the value of variable quantity correspondence therewith, and under the situation of variable quantity more than or equal to predefined setting of dim signal, make discharging current IL follow desired value with the set upper limit value.
Fig. 8 represents from the situation of discharge voltage VL, output current and the light quantity of the discharge lamp FL of preheating till the starting of lighting a lamp.Fig. 8 (a) expression discharge voltage VL, Fig. 8 (b) expression comprises leakage current I_C at interior output current, and Fig. 8 (c) is illustrated in the light quantity of detected discharge lamp FL in the photodiode (photodiode) for example etc.During discharge lamp FL is carried out preheating in the T1, discharge lamp FL lights a lamp in sequential T2.At this moment, the overshoot of discharging current IL (over shoot) in 1 msec, reaches desired value smaller or equal to 10% (being roughly 0) of desired value and discharging current IL.In addition, brightness moment of the discharge lamp FL in this when starting becomes smaller or equal to 5%.
Then, inverter circuit 12 supplies to discharge lamp FL with high frequency voltage V1, so that discharge lamp FL keeps the discharge voltage VL of regulation.
In addition, after this discharge lamp FL lights a lamp, can come the delay of the phase place of voltage detection mechanism 20 detected voltages is proofreaied and correct according to the correcting value of in during starts, being tried to achieve.
Like this, in the described execution mode, come field-effect transistor Q1 according to current detecting mechanism 24 detected electric currents to inverter circuit 12, Q2 carries out FEEDBACK CONTROL, thus, can come according to the discharging current of discharge lamp FL inverter circuit 12 is carried out FEEDBACK CONTROL exactly, and utilize control circuit 16 to come inverter circuit 12 is controlled, operating frequency is reduced and the high frequency voltage starting voltage Vs of voltage will be relatively higher than preheating the time supplies to discharge lamp FL, and the discharging current IL of 27 couples of discharge lamp FL of current detecting mechanism is detected, and become required current value in the electric current moment that makes discharge lamp FL, therefore, the structure that need not be provided with in addition in order to lighting a lamp of discharge lamp FL detected just can detect exactly to the sequential of lighting a lamp of discharge lamp FL.Thereby, make discharge lamp FL can moment the luminous brightly but starting of as bulb, lighting a lamp gradually, even if make discharge lamp FL also can not allow human eye perceives to flash of light from the starting of lighting a lamp of low dimming ratio.
In addition, at least after the preheating release in the process till comprising when starting required lighting a lamp at interior discharge lamp, in the cycle of each current detecting of short period, for example current detecting mechanism 27 of regulation, field-effect transistor Q1, Q2 by 16 pairs of inverter circuits 12 of control circuit carry out FEEDBACK CONTROL, therefore, can further improve the response of FEEDBACK CONTROL, can make discharge lamp FL light a lamp the starting and don't its moment is lit a lamp brightly.
And then, the desired value of output current is increased gradually increases the light quantity of discharge lamp FL gradually, therefore, even if discharge lamp FL also can light a lamp to crescendo before becoming the required state of lighting a lamp and can not light a lamp brightly moment.
And, when discharge lamp FL is installed or under the state that extinguishes of discharge lamp FL, make discharge lamp FL starting when having imported dim signal, thereby when discharge lamp FL is installed or corresponding to peripheral operation, make the discharge lamp FL starting of lighting a lamp gradually when the peripheral operation of the light modulation operating mechanism that utilizes remote control for example etc.
And then, corresponding to the variable quantity of the dim signal of importing by the peripheral operation of light modulation operating mechanism and the light quantity of discharge lamp FL is followed fully under the situation that this variable quantity changes, for example under the bigger situation of variable quantity, the variation of the light quantity of discharge lamp FL is too fast, can allow the people not feel well, at this problem, in the present embodiment, change the followability of the light quantity of discharge lamp FL according to the variable quantity of the dim signal of importing by the peripheral operation of light modulation operating mechanism, thereby a little less than can making sense of discomfort that light modulation brings to human eye.
Particularly, variable quantity at the dim signal of being imported by the peripheral operation of light modulation operating mechanism is lower than under the situation of setting, the current following that makes discharge lamp FL with the value of variable quantity correspondence therewith is to desired value, and under the situation of variable quantity more than or equal to setting of the dim signal of importing by peripheral operation, make the electric current of discharge lamp FL follow desired value more slowly with the set upper limit value, thus can make discharge lamp FL light quantity follow that can not cross slowly can be not too fast yet.
And, according to the sequential of the peak phase of the discharge voltage of discharge lamp FL and come inverter circuit 12 is carried out FEEDBACK CONTROL by current detecting mechanism 24 detected electric currents, therefore, even if when carrying out degree of depth light modulation, also can come inverter circuit 12 is carried out FEEDBACK CONTROL, thereby can carry out degree of depth light modulation according to the discharging current IL of the influence of the delay of the phase place that is not subjected to voltage detection mechanism 20 detected voltages.
In addition, as aligning gear, also can use the tables of data (datatable) of registering correcting value in advance, come the delay of the phase place of voltage detection mechanism 20 detected voltages is proofreaied and correct according to the correcting value of being registered in the tables of data, wherein, described correcting value is that the phase place of for example voltage detection mechanism 20 detected voltages is carried out the required numerical value of timing with respect to the delay of the phase place of the discharge voltage of discharge lamp FL.In the case, testing circuit 27 or control circuit 16 have tables of data.
In addition, voltage detection mechanism and current detecting mechanism etc. can be structure arbitrarily, as long as can be corresponding to these voltage detection mechanism and current detecting mechanism, phase place to the detected voltage of voltage detection mechanism is proofreaied and correct with respect to the delay of the peak phase of the discharge voltage VL of discharge lamp FL, and then peak phase testing agency or aligning gear also can be arbitrarily and constitute.
Claims (9)
1. discharge lamp ignition device is characterized in that comprising:
Inverter circuit, the action that utilizes switch element is converted to the high frequency voltage line output of going forward side by side with direct voltage;
Resonant circuit has inductor and capacitor between the output that is connected in series in described inverter circuit, and carries out resonance corresponding to high frequency voltage;
Discharge lamp is connected between the two ends of capacitor of described resonant circuit, and lights a lamp under the resonance effect of resonant circuit;
Current detecting mechanism is detected the electric current that flows in fact in the described discharge lamp; And
Controlling organization, come the switch element of inverter circuit is carried out FEEDBACK CONTROL according to the detected electric current of described current detecting mechanism, the voltage that can not light a lamp with discharge lamp when preheating comes described discharge lamp is carried out preheating, and operating frequency is reduced and the high frequency voltage of the frequency of voltage when frequency is higher than preheating supplies to discharge lamp, and utilize current detecting mechanism to come the electric current that flows in fact in the discharge lamp is detected, like this, short-period described FEEDBACK CONTROL by each regulation, come inverter circuit is controlled, so that the electric current of discharge lamp is required current value.
2. discharge lamp ignition device according to claim 1 is characterized in that:
Controlling organization, at least after the preheating release up to comprise when starting interior discharge lamp required light a lamp till process in, short cycle with regulation comes the switch element of inverter circuit is carried out FEEDBACK CONTROL, and the desired value of the electric current after the preheating release is increased gradually, thus, the light quantity of discharge lamp is increased gradually and become the required state of lighting a lamp.
3. discharge lamp ignition device according to claim 1 is characterized in that:
By controlling organization the switch element of inverter circuit is carried out FEEDBACK CONTROL in each cycle.
4. discharge lamp ignition device according to claim 1 is characterized in that:
Controlling organization makes described discharge lamp starting when discharge lamp is installed.
5. discharge lamp ignition device according to claim 1 is characterized in that:
Controlling organization makes the discharge lamp starting when having imported dim signal by peripheral operation under the state that discharge lamp extinguishes.
6. discharge lamp ignition device according to claim 5 is characterized in that:
Controlling organization changes the followability of the light quantity of discharge lamp according to the variable quantity of the dim signal of being imported by peripheral operation.
7. discharge lamp ignition device according to claim 6 is characterized in that:
Controlling organization is lower than under the situation of setting at the variable quantity of the dim signal of being imported by peripheral operation, the current following that makes discharge lamp with the value corresponding with described variable quantity is to desired value, and under the situation of variable quantity more than or equal to setting of the dim signal of being imported by peripheral operation, the current following that makes discharge lamp with the set upper limit value is to desired value.
8. discharge lamp ignition device according to claim 1 is characterized in that:
Inverter circuit is the inverter circuit of semibridge system.
9. discharge lamp ignition device according to claim 1 is characterized in that:
Discharge lamp is a fluorescent lamp.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007307831 | 2007-11-28 | ||
| JP2007307831 | 2007-11-28 | ||
| JP2008140090 | 2008-05-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101448355A true CN101448355A (en) | 2009-06-03 |
Family
ID=40743659
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200810178922 Pending CN101448355A (en) | 2007-11-28 | 2008-11-27 | Discharge lamp lighting device |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP5472564B2 (en) |
| CN (1) | CN101448355A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5306428B2 (en) * | 2011-08-09 | 2013-10-02 | シャープ株式会社 | Lighting device and lighting system |
| JP6979590B2 (en) * | 2018-05-31 | 2021-12-15 | パナソニックＩｐマネジメント株式会社 | Lighting device and lighting equipment |
| JP7016017B2 (en) * | 2018-05-31 | 2022-02-04 | パナソニックＩｐマネジメント株式会社 | Lighting device and lighting equipment |
| JP7016018B2 (en) * | 2018-05-31 | 2022-02-04 | パナソニックＩｐマネジメント株式会社 | Lighting device and lighting equipment |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3698191B2 (en) * | 1998-01-30 | 2005-09-21 | 東芝ライテック株式会社 | Power supply device, discharge lamp lighting device, and lighting device |
| JP4048663B2 (en) * | 1999-10-28 | 2008-02-20 | 東芝ライテック株式会社 | Discharge lamp lighting device and lighting device |
| JP2001185385A (en) * | 1999-12-28 | 2001-07-06 | Toshiba Lighting & Technology Corp | Lighting device for discharging lamp and lighting apparatus |
| JP2002352994A (en) * | 2001-05-28 | 2002-12-06 | Matsushita Electric Works Ltd | Lighting device for discharge lamp, and luminaire |
| JP4120192B2 (en) * | 2001-09-25 | 2008-07-16 | 松下電工株式会社 | Discharge lamp lighting device |
| JP4569067B2 (en) * | 2002-05-29 | 2010-10-27 | 東芝ライテック株式会社 | High pressure discharge lamp lighting device and lighting device |
| JP2004172014A (en) * | 2002-11-21 | 2004-06-17 | Asahi Matsushita Electric Works Ltd | Discharge lamp igniter |
| JP2007200621A (en) * | 2006-01-24 | 2007-08-09 | Toshiba Lighting & Technology Corp | Discharge lamp lighting device and lighting system |
| JP2007265790A (en) * | 2006-03-28 | 2007-10-11 | Toshiba Lighting & Technology Corp | Discharge lamp lighting device and lighting apparatus |
-
2008
- 2008-05-28 JP JP2008140090A patent/JP5472564B2/en not_active Expired - Fee Related
- 2008-11-27 CN CN 200810178922 patent/CN101448355A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| JP2009152167A (en) | 2009-07-09 |
| JP5472564B2 (en) | 2014-04-16 |
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Application publication date: 20090603 |