CN101616530B

CN101616530B - Induction lamp lighting device and illumination apparatus

Info

Publication number: CN101616530B
Application number: CN 200910150891
Authority: CN
Inventors: 中城明; 城户大志; 牧村绅司
Original assignee: Matsushita Electric Industrial Co Ltd
Current assignee: Panasonic Holdings Corp
Priority date: 2008-06-25
Filing date: 2009-06-25
Publication date: 2012-11-28
Anticipated expiration: 2029-06-25
Also published as: CN101616530A; JP2010009859A

Abstract

An induction lamp lighting device includes an induction coil arranged adjacent to an induction lamp; a direct current power supply circuit for outputting a direct current voltage; a high-frequency power supply circuit for converting the direct current voltage to an alternating current voltage and supplying the alternating current voltage to the induction coil; and a control circuit for controlling the direct current power supply circuit and the high-frequency power supply circuit. The control circuit performs a startup preparation operation by which to control the high-frequency power supply circuit so that, immediately after the alternating current voltage begins to be outputted from the high-frequency power supply circuit to the induction coil, the alternating current voltage is gradually increased to such a voltage value as not to generate arc discharge in the induction lamp and then kept at the voltage value for a specified time.

Description

Sense light luminaire and lighting device

Technical field

The present invention relates to a kind of sense light luminaire and the lighting device that uses this sense light luminaire.

Background technology

Traditionally; The known sense light luminaire that is used for luminous sense light comprises the bulb of processing by such as the transparent material of glass; And be sealed in discharge gas in the bulb (referring to, for example, the open 2005-158464 of japanese patent application and 2005-158459 number).Such luminaire comprises the induction coil that is adjacent to the sense light setting, and is used for the power subsystem to induction coil supply high-frequency electric power.In the bulb of sense light, generate the electromagnetic field of high frequency through induction coil.If in bulb, generate arc discharge by the electromagnetic field of high frequency, the discharge gas emitted in ultraviolet line that then therefore is stimulated.Fluorescent material is coated on the inner surface of bulb of sense light.Convert ultraviolet ray into visible light through fluorescent material, the resultant induction lamp is luminous.

When starting sense light, what become custom in the prior art is to be right after beginning after the AC power of induction coil supply, keeps constant from high-frequency power supply circuit in the time period in appointment to the frequency of the alternating current of induction coil output.

But, if be right after after beginning to supply alternating current, the frequency of alternating current is kept constant, then be easy in circuit part to generate high relatively electric stress.

[0003]-166259

In addition, the output voltage of DC power supply circuit rises to predetermined normal voltage gradually after starting sense light.Afterwards, said output voltage is maintained said normal voltage.

[0004]-166259

When starting sense light, in technology now, become custom be output voltage stabilization at DC power supply circuit after normal voltage, begin to supply alternating current to induction coil from high-frequency power supply circuit.

[0005]-166259

But,, then beginning from high-frequency power supply circuit when induction coil is supplied alternating current, in circuit part, to generate high relatively electric stress if after normal voltage, begin to supply alternating current at the output voltage stabilization of aforesaid DC power supply circuit.

Summary of the invention

In view of above-mentioned situation, the object of the present invention is to provide a kind of sense light luminaire of the electric stress that can in place's minimizing start-up time circuit part, be generated.

According to an aspect of the present invention, a kind of sense light luminaire is provided, has comprised:

Induction coil is arranged as and is adjacent to sense light;

DC power supply circuit is used for output dc voltage;

High-frequency power supply circuit is used for said converting direct-current voltage into alternating-current voltage, and said alternating voltage is applied to said induction coil; And

Control circuit is used to control said DC power supply circuit and said high-frequency power supply circuit,

Wherein, Said control circuit is used for carrying out the startup beamhouse operation; Control said high-frequency power supply circuit through said startup beamhouse operation, make to be right after to begin after said high-frequency power supply circuit exports said induction coil to that said alternating voltage increases to the magnitude of voltage that in said sense light, does not generate arc discharge gradually at said alternating voltage; And in the time of appointment, keep said magnitude of voltage afterwards

Wherein, Said control circuit is used to carry out start-up operation; Control said high-frequency power supply circuit through said start-up operation, make that said alternating voltage increases to the magnitude of voltage of appointment gradually after stopping said startup beamhouse operation; And keep the magnitude of voltage of said appointment to be lighted afterwards up to said sense light

Wherein, Said sense light luminaire also comprises voltage detecting circuit; The amplitude that is used to export along with said alternating voltage becomes big and detection voltage that its value uprises, and wherein, during said startup beamhouse operation and based on said detection voltage; Said control circuit is used to carry out feedback control manipulation, makes said alternating voltage keep constant through said feedback control manipulation.

According to another aspect of the present invention, a kind of sense light luminaire is provided, has comprised:

Induction coil is arranged as and is adjacent to sense light;

DC power supply circuit is used for output dc voltage;

Wherein, Said sense light luminaire also comprises protective circuit; Be used for detecting unusual in the process of supplying said alternating voltage from said high-frequency power supply circuit to said induction coil, and in case detect unusually, then be used for repeating at least continuously said startup beamhouse operation and said start-up operation; Said protective circuit is used for beginning once more said startup beamhouse operation, up to the value that increases to appointment at the said direct voltage that detects said unusual back decline.

Description of drawings

Fig. 1 is the explanatory view of having explained according to the operation of the sense light luminaire of the first embodiment of the present invention;

Fig. 2 is the circuit block diagram that the luminaire of first embodiment is shown;

Fig. 3 is the perspective view of exemplary use that shows the luminaire of first embodiment;

Fig. 4 is the explanatory view that shows the example of structure of a sense light;

Fig. 5 is the explanatory view that the relation between frequency of operation and the coil voltage has been described;

Fig. 6 is the circuit block diagram that shows sense light luminaire according to a second embodiment of the present invention;

Fig. 7 is the explanatory view of operation that the luminaire of second embodiment has been described;

Fig. 8 is the circuit block diagram that shows the sense light luminaire of a third embodiment in accordance with the invention;

Fig. 9 is the explanatory view of operation that the luminaire of the 3rd embodiment has been described;

Figure 10 is the explanatory view that the relation between the frequency of operation and coil voltage in the luminaire of the 3rd embodiment has been described;

Figure 11 is the circuit block diagram that shows the sense light luminaire of a fourth embodiment in accordance with the invention;

Figure 12 is the explanatory view that the relation between the frequency of operation and coil voltage in the luminaire of the 4th embodiment has been described;

Figure 13 is the explanatory view of operation that the luminaire of the 4th embodiment has been described;

Figure 14 is the circuit block diagram that shows sense light luminaire according to a fifth embodiment of the invention;

Figure 15 is the explanatory view of operation that the luminaire of the 5th embodiment has been described;

Figure 16 is the circuit block diagram that shows sense light luminaire according to a sixth embodiment of the invention;

Figure 17 is the explanatory view of operation that the luminaire of the 6th embodiment has been described;

Figure 18 is the circuit block diagram that shows sense light luminaire according to a seventh embodiment of the invention;

Figure 19 is the explanatory view that the relation between the frequency of operation and coil voltage in the luminaire of the 7th embodiment has been described;

Figure 20 is the explanatory view of operation that the luminaire of the 7th embodiment has been described;

Figure 21 is the circuit block diagram that shows according to the sense light luminaire of the eighth embodiment of the present invention;

Figure 22 is the explanatory view of operation that the luminaire of the 8th embodiment has been described;

Figure 23 is the part excision front view that shows the example of a lighting device that is equipped with this luminaire;

Figure 24 is another example front view that shows the lighting device that is equipped with this luminaire;

Figure 25 A, 25B and 25C be show the lighting device that is equipped with this luminaire another example preceding, face upward and left side view.

Embodiment

Hereinafter, with preferred embodiments of the present invention will be described in detail with reference to the annexed drawings.

(first embodiment)

As shown in Figure 2, the sense light luminaire of present embodiment comprises induction coil 5, it is arranged as is adjacent to sense light; DC power supply circuit 1, it is used for converting the alternating current of being supplied from AC power AC to direct current; High-frequency power supply circuit 2, it be as will converting alternating current to from the direct current of DC power supply circuit 1 output, and next alternating current exported to the power circuit of induction coil 5; Voltage detecting circuit 4, it is used for output and detects voltage Vxs, has promptly that amplitude along with the voltage that exports induction coil 5 from high-frequency power supply circuit 2 to (below, said voltage refers to " coil voltage ") Vx becomes big and the direct voltage of the magnitude of voltage that uprises; And control circuit 3, it is used for controlling high-frequency power supply circuit 2 based on the detection voltage Vxs that exports from voltage detecting circuit 4.

With reference to figure 3, induction coil 5 is wrapped on the cylindrical coupler 50.In the illustrated example of Fig. 3, the sense light luminaire of present embodiment is contained in the metal container 10, and is electrically connected to induction coil 5 via electric current pipeline 10a.

As shown in Figure 4; Sense light 6 comprises by the hollow bulb of processing such as the transparent material of glass, be equipped with formed therein cavity part 60 61, and the tubular support of being processed by synthetic resin and be attached to bulb 61 with the mode around the oral area of cavity part 60 62.Coupler 50 is inserted into cavity part 60, thereby making can induction coil 5 be arranged as is adjacent to sense light 6.A kind of discharge gas that includes such as inert gas and metal vapors is sealed in the bulb 61.The ledge 60a that is inserted into coupler 50 is outstanding from the lower surface of the cavity part 60 of bulb 61.Diaphragm 61b and fluorescent film 61a form on the inner surface of bulb 61.If the electromagnetic field of high frequency that is generated by induction coil 5 generates arc discharge in bulb 61, then convert ultraviolet ray to visible light through fluorescent film 61a.Therefore, sense light 6 is luminous.

DC power supply circuit 1 is the boost converter that people know, and it comprises diode bridge DB, and said diode bridge is used for the alternating current of being supplied from AC power AC is carried out full-wave rectification; The series circuit of inductance L 0, diode D0 and output capacitance C0, said circuit are connected between the output of diode bridge DB; Be connected between the switch element Q0, the node at its place of interconnecting between inductance L 0 and diode D0 and the low-voltage output of diode bridge DB; And voltage control unit 11; It is used for a kind of duty ratio on-off property ground driving switch element Q0 so that the end opposite voltage Vdc of output capacitance C0; Be the output voltage (below, be referred to as " direct voltage ") of DC power supply circuit 1, remain on constant normal voltage Vs (see figure 1).

High-frequency power supply circuit 2 comprises the series circuit of switch element Q1 and Q2 and detection resistance R d, and it promptly connects between the end opposite of output capacitance C0 between the output of DC power supply circuit 1; Inductance L s, the one of which end is connected to the node of switch element Q1 and Q2; Series capacitance Cs, the one of which end is connected to the other end of inductance L s, and the other end of said series capacitance is connected to an end of induction coil 5; Shunt capacitance Cp, the one of which end is connected to the node of inductance L s and series capacitance Cs, and its other end is connected to the node that detects resistance R d and induction coil 5; And driver element 21, it is used for mode on-off property ground driving switch element Q1 and Q2 to replace.Through alternately opening and closing switch element Q1 and Q2, might between the resonant circuit that has comprised inductance L s, series capacitance Cs, shunt capacitance Cp and induction coil 5 and DC power supply circuit 1, switch and be connected.Resonance through resonant circuit will convert high-frequency alternating current to from the direct current of DC power supply circuit 1 output, afterwards to induction coil 5 supply high-frequency alternating currents.Each switch element Q1 and Q2 are formed by N type FET.Driver element 21 is to the drive signal of the grid output square wave of switch element Q1 and Q2, on-off property ground driving switch element Q1 and Q2 thus.Driver element 21 is equipped with control terminal CON.Along with the Control current Io that flows out from control terminal CON becomes big and is set to frequency (being referred to as hereinafter, " the frequency of operation ") f of opening and closing switch element Q1 and Q2 higher.As visible by Fig. 5, frequency of operation f is in the scope that is higher than the resonance frequency f0 of aforesaid resonant circuit (hereinafter, it being abbreviated as " resonance frequency ") usually.Therefore, Io diminishes along with Control current, frequency of operation f step-down, and the amplitude of coil voltage Vx is bigger, and the result has improved from the electrical power of high-frequency power supply circuit 2 to induction coil 5 supplies.In Fig. 5, the curve A on top representes when direct voltage Vdc being remained on normal voltage Vs and sense light 6 when extinguishing, the amplitude of coil voltage Vx | the relation between Vx| and the frequency of operation f.The curve B of bottom representes when direct voltage Vdc being remained on normal voltage Vs and sense light 6 when luminous, the amplitude of coil voltage Vx | the relation between Vx| and the frequency of operation f.

Voltage detecting circuit 4 is formed by current commutates diode, divider resistance and smoothing capacity.Voltage detecting circuit 4 outputs detect voltage Vxs, promptly have the direct voltage that becomes the magnitude of voltage that uprises greatly with the amplitude of coil voltage Vx.

Control circuit 3 comprises the scanning circuit 31 that is used to carry out scan operation, through said scan operation frequency of operation f start-up time of sense light 6 place descend gradually, increase gradually to make the electrical power that exports induction coil 5 to from high-frequency power supply circuit 2 thus.

Scanning circuit 31 comprises operational amplifier OP1, and it is connected to its outlet terminal through feedback resistance R3 with the inversion input terminal, and through input resistance R4 just the inversion input terminal be connected to the output of voltage detecting circuit 4.The outlet terminal of operational amplifier OP1 is connected to the control terminal CON of driver element 21 through the series circuit of forming by prevent to flow backwards diode D1 and output resistance R5.Scanning circuit 31 also comprises: by resistance R 1 and the series circuit that R11 forms, supply constant voltage Vd at the one of which end to this series circuit; By the series circuit that resistance R 10 and switch SW are formed, the one of which end is connected to the other end (that is, an end of resistance R 11) of the resistance R 1 and the series circuit of R11 formation, and the other end ground connection of said series circuit; And the parallel circuits of forming by resistance R 2 and capacitor C 1.The non-inversion input terminal of operational amplifier OP1 is connected to the node of resistance R 1 and R11.In the scanning circuit 31 of present embodiment, the inversion input terminal of operational amplifier OP1 is connected to the output of voltage detecting circuit 4 through aforesaid input resistance R4.Therefore, the amplitude change along with coil voltage Vx uprises the output voltage step-down of operational amplifier OP1 greatly and from the supplied with electric power of high-frequency power supply circuit 2 to induction coil 5.This increases electric current (below, be referred to as " the sweep current ") Isw that flows out to scanning circuit 31 from control terminal CON, makes frequency of operation f higher.Therefore, from the electrical power step-down of high-frequency power supply circuit 2 to induction coil 5 supplies.In other words, scanning circuit 31 also uses from the detection voltage Vxs of voltage detecting circuit 4 outputs and carries out feedback operation.In addition, when the voltage of capacitor C 1 is stablized, will operate scanning circuit 31 as follows.If switch SW is opened, then to the output voltage of the voltage Vc1 of the non-inversion input terminal input of operational amplifier OP1 and operational amplifier OP1 be lower than when switch SW be resulting voltage when closing.This causes the increase of sweep current Isw and frequency of operation f, thereby reduces by the electrical power of high-frequency power supply circuit 2 to induction coil 5 supplies.When with switch SW when opening forwards closed condition to, according to the time constant of the circuit of forming by resistance R 1 and R2 and capacitor C 1 output voltage of operational amplifier OP1 is increased gradually.This causes the reduction gradually of sweep current Isw and frequency of operation f.Therefore, scanning circuit 31 is carried out scan operation, and this scan operation is used for increasing gradually by the electrical power of high-frequency power supply circuit 2 to induction coil 5 supplies.

Control circuit 3 also comprises feedback circuit 32, and it is used for the detection resistance R d based on the voltage at the node place of lower switches element Q2 and high-frequency power supply circuit 2, and the electric current of the high-frequency power supply circuit 2 of promptly flowing through comes the control operation frequency f.Feedback circuit 32 comprises operational amplifier OP2, supplies the reference voltage Vr1 of appointment to its non-inversion input terminal, and its outlet terminal is connected to the control terminal CON of driver element 21 through diode D2 and input resistance R6.Through the parallel circuits of forming by resistance R 7 and capacitor C 2; The inversion input terminal of operational amplifier OP2 is connected to its outlet terminal, and the inversion input terminal of operational amplifier OP2 is connected to the node and detection resistance R d of switch element Q2 through resistance R 8.The electric current that flow to feedback circuit 32 from the control terminal CON of driver element 21 (hereinafter; Being referred to as " feedback current ") Ifb is with respect to the electric current of the induction coil 5 of flowing through (promptly; Electrical power to induction coil 5 supplies) becomes big pro rata, its role is to make electrical power to reduce to induction coil 5 supplies.Therefore, feedback circuit 32 operationally will keep constant from the electrical power that high-frequency power supply circuit 2 applies to induction coil 5.Scanning circuit 31 and feedback circuit 32 are designed; Close and the voltage of capacitor C 1 when stablizing when the switch SW of scanning circuit 31 guaranteeing; Frequency of operation f is equated with glow frequency f1 (referring to Fig. 5), when said glow frequency, can be from high-frequency power supply circuit 2 to induction coil 5 supplied with electric power; This electrical power is even as big as generating H discharge (or arc discharge in sense light 6; Also be known as electromagnetic field of high frequency discharge or inductively-coupled discharge), and guarantee when the voltage of the switch SW unlatching of scanning circuit 31 and capacitor C 1 is stablized, make frequency of operation f and extinguish frequency (extinction frequency) f2 and equate; Said when extinguishing frequency; Can be from high-frequency power supply circuit 2 to induction coil 5 supplied with electric power, this electrical power is even as big as generating E discharge (or glow discharge, also be known as electromagnetic field of high frequency discharge or capacitive coupling discharge) in sense light 6.Because the feedback operation of scanning circuit 31 and feedback circuit 32 makes that frequency of operation f becomes and is lower than said frequencies when direct voltage Vdc is lower than normal voltage Vs.On the contrary, when direct voltage Vdc was higher than normal frequency Vs, frequency of operation f became and is higher than said frequencies.In other words; The desired value of the electrical power of subtend induction coil 5 supplies (promptly; The desired value of the amplitude of coil voltage Vx) is provided with, makes and to close and the voltage of capacitor C 1 when stablize that generation H discharges in sense light 6 when the switch SW of scanning circuit 31; And make and to open and the voltage of capacitor C 1 when stablize, generate in sense light 6 that E discharges but not H discharges when the switch SW of scanning circuit 31.In Fig. 5, voltage Vx1 represents the amplitude that generates the coil voltage Vx of H discharge (arc discharge) in the sense light 6 at this moment | Vx|.

Now, will the operation according to the sense light luminaire of present embodiment be described with reference to figure 1.In each width of cloth of four width of cloth figure shown in Fig. 1, trunnion axis express time t.The longitudinal axis among the uppermost figure is represented the absolute value Vin (that is, the output voltage of diode bridge DB abbreviates it as " input voltage " hereinafter) by the voltage of AC power AC input.The longitudinal axis among several from top to bottom second width of cloth figure is represented the output voltage V dc of DC power supply circuit 1.The longitudinal axis among several from top to bottom the 3rd width of cloth figure is represented the frequency of operation f of high-frequency power supply circuit 2.The longitudinal axis among the nethermost figure is represented coil voltage Vx.

In this regard, with the end ground connection of capacitor C c and Ci, and its other end is connected to the voltage control unit 11 of DC power supply circuit 1 and the driver element 21 of high-frequency power supply circuit 2 respectively.Voltage control unit 11 and the electrical power supply of driver element 21 monitoring from AC power AC; And when beginning to supply (hereinafter from the timing of the t0 of the electrical power of AC power AC; Be referred to as " opening time point "), begin capacitor C c and Ci charging to being connected to itself.Afterwards, in the timing when the voltage with voltage control unit 11 and driver element 21 capacitor C c that are connected own and Ci arrives given voltage, voltage control unit 11 and driver element 21 beginning driving switch element Q0, Q1 and Q2.Through the operation of voltage control unit 11, direct voltage Vdc is from based on the voltage of capacitor C c and the timing that determines increases to normal voltage Vs gradually.After arriving normal voltage Vs, direct voltage Vdc is maintained normal voltage Vs, up to the timing t 4 that stops by the electrical power of AC power AC supply.In example shown in Figure 1; In the timing t 1 of the driver element of high-frequency power supply circuit 2 21 beginning driving switch element Q1 and Q2 (promptly; In the timing that begins to induction coil 5 supply alternating currents; Hereinafter, be referred to as " some start-up time ") be after the voltage control unit 11 of DC power supply circuit 1 begins the timing of driving switch element Q0.

In control circuit 3, through the switch SW of switch control unit (not shown) switch property ground gated sweep circuit 31.When put t1 the start-up time as switch element Q1 that begins to drive high-frequency power supply circuit 2 and Q2 the time at least switch SW is brought to opening.By putting the timing t 2 (hereinafter, be referred to as " time terminal point ") of t1 start-up time, switch SW is gone to closed condition through the time of appointment.Put from start-up time t1 during the time terminal point t2 (hereinafter; Be referred to as " starting the preparatory period "); Carry out to start beamhouse operation, make desired value to the electrical power of induction coil 5 supplies keep enough low through said operation, in sense light 6, not generate arc discharge.During starting beamhouse operation, scanning circuit 31 is carried out FEEDBACK CONTROL with feedback circuit 32.As a result, make frequency of operation f and extinguish frequency f 2 and equate.From time terminal point t2, the scan operation through scanning circuit 31 makes frequency of operation f be reduced to glow frequency f1 gradually.The t3 of point sometime after making frequency of operation f and glow frequency f1 equates (hereinafter, being referred to as " fluorescent lifetime point "), beginning H discharge (arc discharge) in sense light 6.As response, circuit feature by curve A among Fig. 5 represented change to by curve B represented.Therefore, the amplitude of coil voltage Vx diminishes.Afterwards, the switch SW of scanning circuit 31 is remained on closed condition, and frequency of operation f is maintained glow frequency f1, extinguish up to sense light 6.

When lamp 6 extinguished, the charging voltage Vd that imports to the capacitor C 1 of scanning circuit 31 stopped, and capacitor C 1 is through resistance R 2 discharges.As a result, frequency of operation f be higher than the start-up point frequency f 3 of extinguishing frequency f 2 and put the t1 place in start-up time and equate.Owing to capacitor C 1 is carried out charging operations starting the preparatory period, so frequency of operation f is reduced to gradually and extinguishes frequency f 2, and holds it in afterwards and extinguish frequency f 2 up to time terminal point t2.

Utilize above-mentioned configuration, frequency of operation f is initial in start-up time from being higher than the startup frequency f 3 of extinguishing frequency f 2.Therefore, compare from the situation of extinguishing frequency f 2 beginnings with frequency of operation f, the amplitude of coil voltage Vx gently increases after putting t1 start-up time immediately.This has reduced the electric stress that in circuit part, generates.

In addition, and carry out to start beamhouse operation and frequency of operation f is compared with the situation that glow frequency f1 equates, the characteristic of the load circuit of being made up of induction coil 5 and sense light 6 gently changed from start-up time.This helps to make the amplitude of coil voltage Vx and direct voltage Vdc to stablize.

As stated, the frequency f 2 of extinguishing in the present embodiment is provided with, thereby makes and in sense light 6, to generate E discharge (glow discharge).Therefore; Equate with glow frequency f1 from the beginning with making frequency of operation f; Perhaps making said frequency of operation be lower than the situation of extinguishing frequency f 2 compares; This shortened during the amplitude of coil voltage Vx become big relatively time, promptly shortened the time that has begun the time point of H discharge (arc discharge) from the time point that frequency of operation f is equated with glow frequency f1 to reality sense light 6.This has reduced the electric stress that generates in the circuit part in start-up time.

In addition, the feedback operation of scanning circuit 31 and feedback circuit 32 helps to suppress by difference in the characteristic of circuit part or the caused influence of environment temperature.

General commercial power is being used as under the situation of AC power AC, so-called transient current may taking place descend, it equals zero input voltage vin, perhaps in the extremely short time of period t4 to t0 ' as shown in fig. 1, descends.Through said transient current decline sense light 6 is extinguished.If regularly restart the light emission operation of said lamp at the t0 ' of the electrical power normalization of supplying by AC power AC; Then being right after after start-up operation resulting frequency of operation f becomes than in that start-up time, resulting frequency was low usually; This is because owing to the duration of immediate current decline is short, so the voltage of the capacitor C 1 of scanning circuit 31 can not descend.Therefore, it is high relatively that the amplitude of coil voltage Vx becomes, and it is easy to make the electric stress that generates in the circuit part to increase.But, a kind of configuration is provided in the present embodiment, make through said configuration beginning to be lower than a resulting frequency of operation the prior art example from high-frequency power supply circuit 2 resultant frequency of operation f when induction coil 5 output ACs are electric.This makes that it is possible being suppressed at the electric stress that generates in the circuit part, even after immediate current decline has taken place.

Do not adopt at scanning circuit 31 under the situation of the non-inversion input terminal that is arranged in operational amplifier OP1 and the resistance R 11 between the capacitor C 1; Need make to be connected in series to the resistance value of the resistance R 10 of switch SW increases so that make and extinguish frequency f 2 and keeps low as much as possible as stated, and during starting the preparatory period, guarantee coil voltage Vx amplitude reliably.In this case, slowed down said lamp 6 extinguish terminal the time capacitor C 1 discharge operation.But, in the present embodiment, adopt the compatibility of resistance R 11 with the increase of the velocity of discharge of the reduction of attempting to guarantee to extinguish frequency f 2 and capacitor C 1.

[0030]-166259

(second embodiment)

Because the basic configuration of second embodiment and the basic configuration of first embodiment are public, therefore shared part is specified by similar reference character, and will in description, omit.

The present embodiment and the first embodiment difference are that as shown in Figure 6, control circuit 3 does not adopt the R11 that is arranged between operational amplifier OP1 and the capacitor C 1.

Referring now to Fig. 7 the operation according to the sense light luminaire of second embodiment is described.In each width of cloth of four width of cloth figure shown in Fig. 7, trunnion axis express time t.The longitudinal axis among the uppermost figure is represented from the absolute value Vin (that is, the output voltage of diode bridge DB is hereinafter to abbreviate it as " input voltage ") of the voltage of AC power AC input.The longitudinal axis among several from top to bottom second width of cloth figure is represented the output voltage V dc of DC power supply circuit 1.The longitudinal axis among several from top to bottom the 3rd width of cloth figure is represented the frequency of operation f of high-frequency power supply circuit 2.The longitudinal axis among the nethermost figure is represented coil voltage Vx.

[0031]-166259

In this regard, with the end ground connection of capacitor C c and Ci, and its other end is connected to the voltage control unit 11 of DC power supply circuit 1 and the driver element 21 of high-frequency power supply circuit 2 respectively.Voltage control unit 11 and the electrical power of driver element 21 monitoring by AC power AC supply; And by the timing t 0 of AC power AC supplied with electric power (hereinafter in beginning; Be referred to as " opening time point "), begin capacitor C c and Ci charging to being connected to itself.Afterwards; Timing t 1 when the voltage with voltage control unit 11 and driver element 21 capacitor C c that are connected own and Ci arrives given voltage (hereinafter; Be referred to as " some start-up time "), voltage control unit 11 and driver element 21 beginning driving switch element Q0, Q1 and Q2.In the present embodiment, the voltage of the capacitance of capacitor C c and Ci and appointment is confirmed to begin from the same time to the operation of the switch element Q0 of DC power supply circuit 1 and to the operation of the switch element Q1 of high-frequency power supply circuit 2 and Q2 guaranteeing.Under the control of voltage control unit 11, direct voltage Vdc puts t1 from start-up time and increases to normal voltage Vs gradually, and remains on the time point t4 that this normal voltage Vs stops up to the electrical power to DC power supply circuit 1 supply.

[0032]-166259

In control circuit 3, through the switch SW of switch control unit (not shown) switch property ground gated sweep circuit 31.At least put t1 switch SW is brought to opening the start-up time as switch element Q1 that begins to drive high-frequency power supply circuit 2 and Q2 the time.Timing t 2 (hereinafter, being referred to as " time terminal point ") when putting the time of t1 process appointment from start-up time can go to closed condition with switch SW.(hereinafter, be referred to as " starting the preparatory period ") during the time terminal point t2 putting t1 from start-up time, carry out and start beamhouse operation, through said operation frequency of operation f is remained on and extinguish on the frequency f 2.During starting beamhouse operation, scanning circuit 31 is carried out FEEDBACK CONTROL with feedback circuit 32.From time terminal point t2, the scan operation through scanning circuit 31 makes frequency of operation f be reduced to glow frequency f1 gradually.The t3 of point sometime after making frequency of operation f and glow frequency f1 equates (hereinafter, being referred to as " fluorescent lifetime point ") has begun H discharge (arc discharge) in sense light 6.As response, circuit feature by the represented curvilinear motion of curve A among Fig. 5 to by the represented curve of curve B.Therefore, the amplitude of coil voltage Vx diminishes.After this, the switch SW of scanning circuit 31 is remained on closed condition, and frequency of operation f is maintained glow frequency f1, extinguish up to sense light 6.

[0033]-166259

Utilize above-mentioned configuration; Begin from the timing of high-frequency power supply circuit 2 to the boost operations of the timing of induction coil 5 output ACs electricity and the direct voltage Vdc the beginning DC power supply circuit 1, promptly the time point t1 when direct voltage Vdc no show normal voltage Vs is identical.Therefore, compare with the situation that after direct voltage Vdc has arrived normal voltage Vs, begins the output AC electricity, the amplitude of coil voltage Vx is right after after putting t1 start-up time gently to be increased, and this helps to reduce the electric stress that generates in the circuit part.In addition, compare with the situation that after direct voltage Vdc has arrived normal voltage Vs, begins the output AC electricity, the alternating current of exporting to induction coil 5 begins instantaneously.This helps to shorten the 6 luminous required times of sense light.In order to obtain above-mentioned favourable effect; Begin to arrive prior to direct voltage Vdc to the timing of induction coil 5 output ACs electricity the timing of normal voltage Vs from high-frequency power supply circuit 2; Perhaps the timing that begins the direct voltage Vdc in the DC power supply circuit 1 is carried out boost operations (that is the timing of voltage control unit 11 beginning driving switch element Q0) before or after.But if the timing of beginning output AC electricity is before beginning that direct voltage Vdc carried out the timing of boost operations, then electric power loss will increase.On the contrary, if the timing of beginning output AC electricity is after beginning that direct voltage Vdc carried out the timing of boost operations, the electric stress that then in circuit part, generates will increase.Owing to these reasons, preferably, the timing that makes beginning output AC electricity overlaps with the timing that begins direct voltage Vdc is carried out boost operations.

[0034]-166259

In addition, and carry out to start beamhouse operation and frequency of operation f is compared with the situation that glow frequency f1 equates, the characteristic of the load circuit of being made up of induction coil 5 and sense light 6 gently changed in start-up time.This helps to make the amplitude stability of coil voltage Vx and direct voltage Vdc, thereby has suppressed to be extinguished or glimmered by descend caused sense light 6 too early of the transient state in the electrical power of induction coil 5 output.

[0035]-166259

As stated, the frequency f 2 of extinguishing in the present embodiment is provided with, thereby makes and in sense light 6, to generate E discharge (glow discharge).Therefore; Equate with glow frequency f1 from the beginning with making frequency of operation f; Or make said frequency of operation be lower than the situation of extinguishing frequency f 2 to compare; This shortened during the amplitude of coil voltage Vx become big relatively time, promptly shortened from extremely ought be sense light 6 when the time point that frequency of operation f is equated with glow frequency f1 reality begun time of the time point of H discharge (arc discharge).This has reduced the electric stress that in circuit part, generates in start-up time.

[0036]-166259

In addition, during starting beamhouse operation, carry out the feedback operation of scanning circuit 31 and feedback circuit 32, this helps to suppress by difference in the characteristic of circuit part or the caused influence of environment temperature.Therefore, compare, during starting beamhouse operation, stablized the amplitude of coil voltage Vx with the situation of not carrying out FEEDBACK CONTROL.

[0037]-166259

With general commercial power as under the situation of AC power AC, so-called transient current may take place to descend, it equals zero input voltage vin, perhaps decline in the extremely short time of as shown in Figure 7 period t4 to t0 '.Alternately using under AC power AC and the situation of battery (not shown), supposing that in a single day the electrical power to DC power supply circuit 1 supply stops during Switching power as the power supply of DC power supply circuit 1.Extinguish sense light 6 through immediate current decline or power interruptions.If restart the light emission operation of said lamp in the timing t 0 ' of the electrical power normalization of supplying to DC power supply circuit 1; Then being right after after start-up operation resulting frequency of operation f becomes to be lower than and extinguishes frequency f 2; This is because because immediate current descends or the duration of power interruptions is short, so the voltage of the capacitor C 1 of scanning circuit 31 can not reduce fully.Therefore, it is high relatively that the amplitude of coil voltage Vx becomes, and it is easy to make the electric stress that generates in the circuit part to increase.But, begin to arrive prior to direct voltage Vdc to the timing of induction coil 5 output AC power sources the timing of normal voltage Vs in the present embodiment from high-frequency power supply circuit 2.Because this characteristic, it is possible being suppressed at the electric stress that generates in the circuit part, even after immediate current decline or power interruptions have taken place.

[0038]-166259

In addition, even after the electrical power by AC power AC supply stops, can be through operating the electrical power that high-frequency power supply circuit 2 consumes the output capacitance C0 of DC power supply circuits 1.It is preferred using this configuration; This is because compare with the situation that direct voltage Vdc is descended; Said configuration makes and locates to reduce direct voltage Vdc at the concluding time point t0 ' that immediate current descends is possible, and possibly make electric stress keep low as much as possible.

(the 3rd embodiment)

Because the basic configuration of the 3rd embodiment and the basic configuration of first embodiment are shared, therefore shared part is specified by similar reference character, and will in description, omit.

The present embodiment and the first embodiment difference are that as shown in Figure 8, control circuit 3 comprises protective circuit 33, and it is through detecting the not luminous to carry out the protection operation of appointment of sense light 6 based on the detection voltage Vxs from voltage detecting circuit 4 outputs.Another difference is the configuration of scanning circuit 31.

Scanning circuit 31 is at first described.The scanning circuit 31 of present embodiment and the scanning circuit difference of first embodiment are resistance R 11 not to be arranged between the non-inversion input terminal and capacitor C 1 of operational amplifier OP1, and different be to have added series circuit 1 that be connected in parallel with capacitor C, that form by switch SW 1 and resistance R 12.Said scanning circuit 31 also comprises the switch control unit (not shown) that is used for switch property ground control switch SW and SW1.Put from fall time to the start-up time of sense light 6 t1 during; Switch control unit is opened the switch SW and the SW1 of scanning circuit 31; Thereby the frequency of operation f that puts the t1 place start-up time is equated with startup frequency f 4, be higher than like said startup frequency f 4 illustrated in fig. 9 and extinguish frequency f 2.Put the t1 place in start-up time, switch control unit is closed said switch SW 1, makes frequency of operation f to be reduced to gradually according to the time constant of capacitor C 1 and resistance R 2 and R10 and extinguishes frequency f 2.At time terminal point t2 place, switch control unit off switch SW, thus make frequency of operation f to be reduced to glow frequency f1 gradually according to the time constant of capacitor C 1 and resistance R 2.Can realize above-mentioned switch control unit through known technology, omit therefore will and describing from explanation.

[0025]-1666259

In Figure 10, the curve A on top representes when direct voltage Vdc being remained on normal voltage Vs and sense light 6 when extinguishing, the amplitude of coil voltage Vx | the relation between Vx| and the frequency of operation f.The curve B of bottom representes when direct voltage Vdc being remained on normal voltage Vs and sense light 6 when luminous, the amplitude of coil voltage Vx | the relation between Vx| and the frequency of operation f.

[0040]-166259

As shown in Figure 8, the control circuit 3 of present embodiment comprises protective circuit 33, and it detects unusually (sense light 6 not luminous) based on the detection voltage Vxs from voltage detecting circuit 4 output.Protective circuit 33 comprises comparator C P1, and its non-inversion input terminal is connected with the output of voltage detecting circuit 4, and to its inversion input terminal supply reference voltage Vr2.Protective circuit 33 also comprises capacitor C 3, by the output voltage of the comparator C P1 through resistance R 9 input said electric capacity is charged; And protection control unit 33a, its voltage based on capacitor C 3 detects unusually, and is used for stopping the voltage control unit 11 of DC power supply circuit 1 and the driver element 21 of high-frequency power supply circuit 2 when detecting when unusual.

[0041]-166259

Particularly, the voltage of protection control unit 33a monitoring capacitor C 3, and when the voltage of capacitor C 3 is higher than a certain definite voltage, begins protection and operate.As illustrated in fig. 9, come the execute protection operation through triplicate alternately: protection period t6 to t1, the driver element 21 that stops high-frequency power supply circuit 2 during this period is to stop from the electrical power of circuit 2 to induction coil 5 outputs; Starting period t1 to t6 controls high-frequency power supply circuit 2 during this period, thereby makes after starting beamhouse operation t1 to t2, can be to induction coil 5 outputs greatly to the electrical power that enough in sense light 6, generates arc discharge (H discharge).

In each width of cloth of four width of cloth figure shown in Fig. 9, trunnion axis express time t.The longitudinal axis among the uppermost figure is represented from the absolute value Vin (that is the output voltage of diode bridge DB) of the voltage of AC power AC input.The longitudinal axis among several from top to bottom second width of cloth figure is represented the output voltage V dc of DC power supply circuit 1.The longitudinal axis among several from top to bottom the 3rd width of cloth figure is represented the frequency of operation f of high-frequency power supply circuit 2.The longitudinal axis among the nethermost figure is represented coil voltage Vx.

[0042]-166259

Be right after before the end that starts t1 to t6 in period (in the present embodiment; For arrive the time point place of glow frequency f1 through scan operation at frequency of operation f; Hereinafter, this time point is called " confirming a little "), make definite unusually based on the voltage of capacitor C 3.If confirm that owing to the voltage of capacitor C 3 is lower than voltage causes not detecting unusually, then protect control unit 33a to confirm that sense light 6 is successfully luminous.Subsequently, control circuit 3 is carried out normal running, keeps constant luminous (arc discharge) state of keeping sense light 6 through the amplitude that makes coil voltage Vx during this period.On the contrary; If owing to confirming that some t5 place detects the unusual execute protection operation continuously that causes; Then protect control unit 33a to stop (promptly by the performed boost operations of the voltage control unit of DC power supply circuit 1 11; Operation to switch element Q0) also lasting fixed time, direct voltage Vdc is equated with the protection voltage V1 that is lower than normal voltage Vs in protection period from t5 to t1.When starting the beginning t1 in period, the operation that protection control unit 33a restarts voltage control unit 11, thus little by little make direct voltage Vdc increase to normal voltage Vs once more.Therefore, during startup period of correspondence, originate in before direct voltage Vdc arrives normal voltage Vs to the electrical power of induction coil 5 outputs from high-frequency power supply circuit 2, like the situation in common start-up operation.

[0043]-166259

In the present embodiment, the timing t 6 that stops of the driver element 21 of high-frequency power supply circuit 2 is after the timing t 5 that the voltage control unit 11 of DC power supply circuit 1 stops.Therefore; Dwell time t6 place at high-frequency power supply circuit 2; The feedback operation that is easy to the reduction on the compensating direct current voltage Vdc through scanning circuit 31 and feedback circuit 32 makes frequency of operation f be reduced to frequency f 3, and said f3 more approaches resonance frequency f0 than glow frequency.When protection period initial (, when the dwell time of the driver element 21 of high-frequency power supply circuit 2), the switch SW of scanning circuit 31 is opened, like the situation in the common fall time.Switch SW is held open state up to when preparing concluding time point t2, it being closed, and the initial t1 that on said time point t2, has started period from the next one has passed through appointment time.As a result, startup period of correspondence begin locate to carry out and at the identical startup beamhouse operation at common start-up time of place.

[0044]-166259

If do not light sense light 6, and be consecutively detected unusually, or even after the protection operation stopped, then the protection control unit 33a of protective circuit 33 had confirmed to take place sense light 6 not to be arranged as the no-load condition that is adjacent to induction coil 5.Therefore, protection control unit 33a is through stopping voltage control unit 11 with driver element 21 and protective circuit, and holds it in afterwards and do not work.

[0045]-166259

Utilize above-mentioned configuration, compare, improved startability through the protection operation with first embodiment.

[0046]-166259

During protection period and be right after at least before startup period, direct voltage Vdc is remained below the protection voltage V1 place of normal voltage Vs.Therefore,, and in protection operating period direct voltage Vdc is maintained constant situation and compares, reduced the electric stress that in circuit part, generates at the initial t1 in startup period of correspondence.

[0047]-166259

Because the timing t 6 of driver element 21 that stops high-frequency power supply circuit 2 is after the timing t 5 of the voltage control unit that stops DC power supply circuit 1 11; Therefore, high-frequency power supply circuit 2 electrical power that stopping voltage control unit 11 during the t5 to t6 and stopping to have consumed between the driver element 21 the output capacitance C0 of DC power supply circuit 1 subsequently in period.For this reason, stop at one time with driver element 21 with voltage control unit 11 and direct voltage Vdc only by to the natural discharge operation of output capacitance C0 and situation about descending compare, direct voltage Vdc descends apace.When this makes that the electric stress that in circuit part, generates remains unchanged; It is possible shortening the protection required time of operation; Make that perhaps it is possible being suppressed at the electric stress that is generated when restarting the protection operation when keeping the required time of protection operation.

[0048]-166259

At guard period; Maybe be like the above-mentioned driver element that does not stop high-frequency power supply circuit 2 21; But be operated in frequency of operation f continuously, thereby make the amplitude of coil voltage Vx can become less than available maximum in starting beamhouse operation the amplitude of incubation period terminal point t2 place (that is).Use this fluctuation of putting the start-up time that helps after protection operation stops in the amplitude that t1 place alleviates coil voltage Vx, electric stress that this further minimizing generates of disposing in circuit part.

[0022]-217412

(the 4th embodiment)

The sense light luminaire of a fourth embodiment in accordance with the invention will be described with reference to figures 11 to Figure 13 now.

With reference to Figure 11, the luminaire of present embodiment comprises DC power supply circuit 1, and it is used for producing dc output power from the interchange power output of AC power AC; High-frequency power supply circuit 2, it is used for converting the dc output power of DC power supply circuit 1 to the high frequency power output, and identical being supplied to is arranged near the induction coil 5 the sense light 6; Scanning circuit 31, it is used for starting sense light 6 through at lamp place's start-up time the output voltage V x (being applied to the voltage of induction coil 5) of high-frequency power supply circuit 2 being increased gradually; Voltage detecting circuit 4, it is used to detect the output voltage V x of high-frequency power supply circuit 2; Current detection circuit, it is used to detect the resonance current of the following resonant circuit that will mention 210 of flowing through; And feedback circuit 32; It is used for through controlling the frequency f inv (frequency of operation) that the following driver element that will mention 21 changes drive signal VDH and VDL based on the detection electric current of current detection circuit, thereby makes that the output voltage V x of high-frequency power supply circuit 2 can be on level terms with expection.

[0023]-217412

DC power supply circuit 1 is formed by conventionally known boost chopper circuit; Said boost chopper circuit comprises that the alternating current that is used for from commercial power AC output carries out the rectification circuit 10 of rectification, and the driver element 11 that is used to drive inductance L 1, diode D1, smoothing capacity C1 and switch element Q1.DC power supply circuit 1 is designed to output dc voltage Vdc.

[0024]-217412

High-frequency power supply circuit 2 comprises pair of switches element Q2 and the Q3 that in series between the output of DC power supply circuit 1, connects; And high-frequency power supply circuit 2 is formed by so-called semi-bridge type inverter circuit; In said semi-bridge type inverter circuit, will comprise that the resonant circuit 210 of inductance L s and capacitor C p and Cs is connected to lower switches element Q3.Response to drive signal VDH and VDL is the square wave pulse from driver element 21 outputs; Alternately switch switch element Q2 and the Q3 that forms by field-effect transistor through high-frequency power supply circuit 2, thereby make and through resonant circuit 210 the high frequency power output to be supplied to induction coil 5.The drive signal VDH that is used for driving switch element Q2 has differing of about 180 degree with the drive signal VDL that is used for driving switch element Q3.

[0025]-217412

With capacitor C cp and Cinv be inserted in

driver element

11 and 21 and ground between.Capacitor C cp and Cinv are used to be provided with the time period that begins between the time that the time and the

driver element

11 and 21 of commercial power AC supply of current are operated.

[0026]-217412

To comprise that the induction coil 5 of multiturn conductor wire is connected to the output of resonant circuit 210.Sense light 6 is arranged as is adjacent to induction coil 5.

[0028]-217412

Voltage detecting circuit 4 comprises current commutates diode, divider resistance, smoothing capacity or the like.From voltage detecting circuit 4 export to scanning circuit 31 for detecting voltage Vxs, promptly corresponding direct voltage with the output voltage V x of high-frequency power supply circuit 2.Current detection circuit is by forming at the detection resistance R d that is connected between the lower switches element Q3 of high-frequency power supply circuit 2 and the ground.From what current detection circuit exported feedback circuit 32 to be and the corresponding detection voltage VRd of the high-frequency current of the switch element Q3 that the flows through resonance current of resonant circuit 210 (that is, flow through).

[0029]-217412

Scanning circuit 31 comprises capacitor C 2, through through temperature-sensitive resistor R1 capacitor C 2 being charged with the operation of the voltage Vd that steadily obtains by the decline of the output voltage V dc of DC power supply circuit 1; Error amplifier, it forms through input resistance and feedback resistance are connected to operational amplifier OP1, and said error amplifier is designed to the difference between the detection voltage Vxs of the voltage Vc of capacitor C 2 and voltage detecting circuit 4 is amplified; With the capacitor C 2 parallel divider resistance R2 that are connected; By the series circuit that resistance R 3 and discharge switch SW1 constitute, said resistance R 3 and all parallel capacitor C 2 that is connected to of discharge switch SW1; And the series circuit that constitutes by resistance R 4 and discharge switch SW2, said resistance R 4 and all parallel capacitor C 2 that is connected to of discharge switch SW2.Scanning circuit 31 produces the output voltage V f that the time constant according to the charging circuit of being made up of resistance R 1 and capacitor C 2 rises gradually.The output voltage V f of scanning circuit 31 is inputed to driver element 21.In the present embodiment, the on/off switch operation that comes control switch SW1 and SW2 through the ON-OFF control circuit (not shown) that comprises such as microcomputer.Tentatively ON-OFF control circuit is provided with the open/close state of diverter switch SW1 and SW2 periodically after starting luminaire.

[0030]-217412

Feedback circuit 32 comprises error amplifier (differential amplifier); It forms through input resistance or the like being connected to operational amplifier OP2, and said error amplifier is designed to the difference between the detection voltage VRd of reference voltage Vref and current detection circuit is amplified; And diode D3, the negative electrode of said diode is connected to the outlet terminal of operational amplifier OP2 through resistance.Reference voltage Vref is inputed to the non-inversion input terminal of operational amplifier OP2.The delay circuit that will form through the parallel circuits of resistance R 5 and capacitor C 3 is connected between the inversion input terminal and outlet terminal of operational amplifier.In addition, through resistance the negative electrode of diode D2 is connected to the outlet terminal of the operational amplifier OP1 of the error amplifier that forms scanning circuit 31.With the parallel input terminal that is connected to driver element 21 of the anode of diode D2 and D3.In this connection, apply constant voltage (perhaps input terminal voltage) to the input terminal of driver element 21.When the output voltage of the error amplifier of scanning circuit 31 (promptly; During the output voltage V f of operational amplifier OP1) less than the input terminal voltage of driver element 21; Diode D2 can conduct electricity, thereby makes that the first Control current Isw corresponding with electrical potential difference can flow through through said diode.Equally; When the output voltage of the error amplifier of feedback circuit 32 (promptly; During the output voltage V n of operational amplifier OP2) less than the input terminal voltage of driver element 21, diode D3 can conduct electricity, thereby makes that the second Control current Ifb corresponding with electrical potential difference can flow through through said diode.The amplitude that this means the Control current Io that flows out from the input terminal of driver element 21 equates with the summation of the first and second Control current Isw and Ifb.

[0031]-217412

Simultaneously, driver element 21 is equipped with oscillator.The concussion frequency of oscillator changes according to the Control current Io that the input terminal from driver element 21 flow to the outlet terminal of scanning circuit 31 and feedback circuit 32.The frequency of drive signal VDH and VDL (frequency of operation) finv increases pro rata or reduces with respect to Control current Io.Therefore, when the output voltage V f of the error amplifier of scanning circuit 31 and feedback circuit 32 and Vn uprised, the frequency of operation finv of driver element 21 descended pro rata.

[0032]-217412

Now, the operation that will describe according to the luminaire of present embodiment with reference to Figure 12 and 13.Figure 12 has explained the output characteristic of high-frequency power supply circuit 2, and in this view, trunnion axis is represented the frequency of operation finv of driver element 21, and the longitudinal axis is represented the output voltage V x of high-frequency power supply circuit 2.What curve A was represented sense light 6 extinguishes state (that is, no-load condition), and curve B is represented the luminance (that is fluorescent lifetime) of sense light 6.Figure 13 shows sequential chart, and the trunnion axis express time t of each width of cloth figure wherein, the longitudinal axis be frequency of operation finv, the output voltage V x of high-frequency power supply circuit 2 and the output voltage V dc of DC power supply circuit 1 of expression driver element 21 from the sequential chart at top and down.

[0033]-217412

If beginning from commercial power AC is DC power supply circuit 1 supply of current (at time point t1) of opening to switch SW 1 with SW2, then the output voltage V dc of DC power supply circuit 1 increase and the output voltage V f of scanning circuit 31 with and the quotient corresponding voltage value that obtains divided by resistance R 1, R2, R3 and R4 of operating voltage Vd equate.Locate in this time, will be set to equate (referring to Fig. 3) from the drive signal VDH of driver element 21 outputs and the frequency f inv (that is the frequency of operation of high-frequency power supply circuit 2) of VDL with initial voltage value (or starting initialization frequency) f2.As illustrated in fig. 12, be set to equate with frequency far above available resonance frequency f0 in no-load condition with starting initialization frequency f 2.Therefore, can make that (the output voltage V x of=high-frequency power supply circuit 2 f2) located drops to a low value (referring to Figure 13) at frequency of operation finv.Last till time point t2 the period that switch SW 1 and SW2 all are unlocked, this time period is called first starts incubation period T1.

[0034]-217412

Beginning first starts incubation period T1 arrives appointment up to the output voltage V dc of DC power supply circuit 1 voltage (that is the available burning voltage at the fluorescent lifetime place of sense light 6).Start incubation period T1 first, to the enough big high frequency voltage Vx of induction coil 5 supplies applying load to dc voltage circuit 1, thereby make the output voltage V dc of DC power supply circuit 1 be no more than the voltage of appointment.

[0035]-217412

At time point t2, switch SW 2 is closed, and output voltage V f is equated with the quotient corresponding voltage value that obtains divided by resistance R 1, R2 and R3 with operating voltage Vd.Locate in this time, output voltage V f becomes greater than starting the resulting output voltage of incubation period T1 first.For this reason, when as output voltage V f illustrated in fig. 12 when increasing, frequency of operation finv is equated with frequency f 3 less than startup initialization frequency f 2.The output voltage V x of high-frequency power supply circuit 2 becomes greater than resulting output voltage V x on the first startup incubation period T1, and this output voltage is kept high as much as possible (referring to Figure 13) in the scope that does not start sense light 6.Off switch SW2 during it and time period of opening switch SW 1 lasts till time point t3 is called second with this time period and starts incubation period T2.

[0036]-217412

At time point t3, switch SW 1 and switch SW 2 are closes, and makes output voltage V f and equate divided by the quotient corresponding voltage value that resistance R 1 obtains with R2 with operating voltage Vd.Locate in this time, output voltage V f becomes greater than starting resulting output voltage on the incubation period T2 second.For this reason, when output voltage V f increases as shown in Figure 12, frequency of operation finv is equated with frequency f 1 less than frequency f 3.The output voltage V x of high-frequency power supply circuit 2 becomes greater than starting resulting output voltage V x (referring to Figure 13) on the incubation period T2 second.Startup T3 in period is after time point t3.Starting T3 in period, the output voltage V x of high-frequency power supply circuit 2 arrives starting resistor.At time point t4, sense light 6 is luminous, and its characteristic is changed to curve B from curve A.As a result, output voltage V x reduces, and luminous T4 arrival in period (referring to Figure 13).

[0037]-217412

Turn to feedback circuit 32, the output current of high-frequency power supply circuit 2 (resonance current) is almost nil at time point t1.Therefore, detect voltage VRd and become almost nil, and the output voltage V n that makes the operational amplifier OP2 that the error amplifier by feedback circuit 32 forms with and equate corresponding to the initial value (maximum) of reference voltage Vref.As time passes, the output current of high-frequency power supply circuit 2 increases together with detecting voltage VRd.Owing to the operation of the delay circuit of being made up of resistance R 5 and capacitor C 3, the output voltage V n of operational amplifier OP2 can not reduce from initial value, and the second Control current Ifb of feedback circuit 32 becomes almost nil.Therefore, although the output voltage V n of operational amplifier OP2 is remained on the input terminal voltage that is higher than driver element 21, the second Control current Ifb becomes almost nil, and Control current Io almost equates with the first Control current Isw.Owing to this reason, the FEEDBACK CONTROL of feedback circuit 32 undo frequency f inv, and only carry out the control that frequency of operation finv is descended according to the first Control current Isw that exports from scanning circuit 31 gradually.

[0038]-217412

In this regard, be set to equate basically with in the initial 6 luminous required times of sense light (from time point t1 to time that time point t3 is passed) by time that delay circuit postponed of feedback circuit 32.After time point t3, the second Control current Ifb flows according to the electrical potential difference between the input terminal voltage of the output voltage V n of operational amplifier OP2 and driver element 21.Therefore, frequency of operation finv increases together with the increase of Control current Io, and the output voltage V x of high-frequency power supply circuit 2 reduces.With the frequency of operation finv of driver element 21 be stabilized in when resonance current when being used for sense light 6 specified luminous desired on level terms, i.e. resulting frequency (specified glow frequency) when detection voltage VRd equates with reference voltage Vref.From that time; The frequency of operation finv of feedback circuit 32 FEEDBACK CONTROL driver elements 21; Thereby make resonance current (that is, the output current of high-frequency current circuit 2) stably to light sense light 6 thus with on level terms by the determined expection of reference voltage Vref.

[0039]-217412

Aforesaid, before startup T3 in period, provide second to start incubation period T2, start in the incubation period said second, the output voltage V x of high-frequency power supply circuit 2 is set in the scope that does not start sense light 6 big as much as possible.This makes and prevents that the rapid fluctuation of load during startup T3 transition in period, taking place from being possible.Its also make through start-up time the place prevent that the reduction of the output voltage V dc of DC power supply circuit 1 from guaranteeing that the safety of enough big starting resistor is possible.In addition; Provide first to start incubation period T1; The voltage that its output voltage V dc up to DC power supply circuit 1 arrives appointment is opened; And in said period to the enough big high frequency voltage Vx of induction coil 5 supply applying load to DC power supply circuit 1, thereby make DC power supply circuit 1 be no more than given voltage.Provide the first startup incubation period T1 to make and prevent that the output voltage V dc of DC power supply circuit 1 from avoiding overshoot, and prevent that to the circuit part stress application be possible.

[0040]-217412

Suppose not to induction coil 5 and apply voltage up at the time point t2 that begins from commercial power AC after DC power supply circuit 1 applies electric current; I.e. supposition only provides the second startup incubation period T2 and does not have the first startup incubation period T1, then will put between the t1 and the second time point t2 in the very first time to the voltage that induction coil 5 is applied and become almost nil.This causes not consuming the slight load of the output voltage V dc of DC power supply circuit 1.For this reason, carry out overshoot beyond the designated value that the output voltage V dc of DC power supply circuit 1 will obtain in sense light 6 luminous time places, finally apply serious stress to circuit part.But, in the present embodiment, provide aforesaid first to start incubation period T1.This make begin to the time and second that DC power supply circuit 1 applies voltage start between time started of incubation period T2 during, prevent the output voltage V dc overshoot of DC power supply circuit 1.This has eliminated the possibility to the circuit part stress application.

[0041]-217412

In the present embodiment; Feedback circuit 32 or the like even the time of the restarting place after commercial power AC suffers immediate current decline does not reset also progressively increases from low-voltage on the first startup incubation period T1 and the second startup incubation period T2 to the high frequency voltage Vx that induction coil 5 applies.This makes that the generation of the electric spark prevent that the time of restarting after immediate current descends from locating is possible.

[0042]-217412

From first start incubation period T1 to second start incubation period T2 transit time during, and from second start incubation period T2 to start T3 transit time in period during, to capacitor C 2 chargings, and output voltage V f increases gradually.This has caused the reduction gradually of frequency of operation finv, and the mild increase of the output voltage V x of high-frequency power supply circuit 2.Because this characteristic, the output voltage V x that possibly prevent high-frequency power supply circuit 2 avoids otherwise will be by the caused overshoot of the rapid fluctuation of load at place's transit time.This makes possibly reduce the stress that applies to circuit part.

[0043]-217412

(the 5th embodiment)

Now, will be refer to figs. 14 and 15 the sense light luminaire of describing according to a fifth embodiment of the invention.Because the basic configuration of present embodiment and the basic configuration of the 4th embodiment are shared, therefore shared part is specified by similar reference character, and will in description, omit.As shown in Figure 14; The characteristics of present embodiment are to provide protective circuit 33; It is detecting unusually to the electrical power of induction coil 5 supply from high-frequency power supply circuit 2, and in case detect unusually, will repeat first continuously and start incubation period T1, second and start incubation period T2, start T3 and protection T5 in period in period; Interim when said, stop the operation of direct current circuit 1 and high-frequency power supply circuit 2.

[0044]-217412

In the present embodiment, in scanning circuit 31, start the handover operation that timing control circuit 500 is carried out switch SW 1 and SW2 through using.With starting the driver element 21 of driver element 11 and high-frequency power supply circuit 2 that timing control circuit 500 is connected to DC power supply circuit 1 on both.Starting timing control circuit 500 provides control signal to switch SW 1 with SW2, through said control signal with switch SW 1 and SW2 from provide the time of electric current to switch to closed condition after having spent the fixed time to driver element 11 and 21.Delay circuit through being made up of diode D4, resistance R 7 and capacitor C 5 directly is applied to control signal switch SW 1 and is applied to switch SW 2 indirectly.Therefore, in such a way switch SW1 and SW2 are controlled, can be thereby make at off switch SW2 after the effluxion fixed time of off switch SW1.Can start incubation period T1, the second startup incubation period T2 and startup T3 in period to first through the time constant that resistance R 7 and capacitor C 5 are set suitably is provided with.

[0045]-217412

Protective circuit 33 comprises operational amplifier OP3, to its non-inversion input terminal the detection voltage Vxs of voltage detecting circuit 4 is provided, and to its inversion input terminal reference voltage Vb is provided; Delay circuit, it comprises resistance R 6 and capacitor C 4, both all are connected with the outlet terminal of operational amplifier OP3; And the halt circuit 90 that provides the voltage of capacitor C 4, be used for stopping the operation of DC power supply circuit 1 and high-frequency power supply circuit 2 according to the voltage that therefore provides.According to reference voltage Vb being set starting the high frequency voltage Vx that period, the T3 place obtained, thereby making and can the output voltage of operational amplifier OP3 be brought to high level in case carry out the transition to startup T3 in period.If the voltage that inputs to the capacitor C 4 of halt circuit 90 surpasses the voltage of appointment; Then halt circuit 90 applies control signal to the driver element of DC power supply circuit 1 and the driver element 21 of high-frequency power supply circuit 2, thereby continues the operation that preset time stops corresponding driver element.Also apply control signal, startup timing control circuit 500 is resetted to starting timing control circuit 500.

[0046]-217412

Now, will the operation according to the luminaire of present embodiment be described with reference to Figure 15.If beginning provides electric current from commercial power AC to DC power supply circuit 1, then described in first embodiment, start incubation period T1, second through first and start incubation period T2 and start T3 executive control operation in period to start sense light 6.In the present embodiment, carry out FEEDBACK CONTROL through the detection voltage Vxs that applies voltage detecting circuit 4 to scanning circuit 31.Therefore,, can prevent that also high frequency voltage Vx from reducing, and make high frequency voltage keep constant (referring to Fig. 2 and 5) through making frequency of operation finv drop to f4 from f1 even the output voltage V dc of DC power supply circuit 1 is starting T3 reduction in period.

[0047]-217412

Under the unusual situation that has the no-load condition for example cause by non-the adhering to of sense light 6, apply high voltage continuously and sense light 6 does not have luminously, this causes adverse influence to circuit.Owing to this reason, hope when startup T3 in period has continued greater than the scheduled time, to stop the operation of DC power supply circuit 1 and high-frequency power supply circuit 2.In the present embodiment, in case transit to startup T3 in period, begin capacitor C 4 chargings to protective circuit 33.If the voltage of capacitor C 4 continues the voltage that the preset time section surpasses appointment; Then halt circuit 90 is to the driver element 11 of correspondence and 21 and start timing control circuit 500 and apply control signal, thereby stops operation to DC power supply circuit 1 and high-frequency power supply circuit 2 to transit to protection T5 in period.If after transitting to protection T5 in period, passed through by the set predetermined period of halt circuit 90, the operation that then recovers DC power supply circuit 1 and high-frequency power supply circuit 2.Afterwards, repeat aforesaid operations.In this regard, owing to protecting the operation that has stopped DC power supply circuit 1 period during the T5, so output voltage V dc reduces.In the present embodiment, twice recovery first starts incubation period T1 is increased to appointment at least up to output voltage V dc voltage.If, then confirm to exist no-load condition by the function of halt circuit 90 with above-mentioned continued operation triplicate.Therefore, the operation that stops DC power supply circuit 1 and high-frequency power supply circuit 2 fully is with protective circuit.

[0048]-217412

As stated; The luminaire of present embodiment is equipped with halt circuit 90; It is used for detecting unusual in the electrical power that provides to induction coil 5 from high-frequency power supply circuit 2; In case detect unusual then stop operation, and repeat first subsequently once more and start incubation period T1, second and start incubation period T2 and start T3 in period to DC power supply circuit 1 and high-frequency power supply circuit 2.Provide halt circuit to make possibly to prevent as dark place or the almost non-luminous situation of low temperature sense light 6 under and sense light 6 when not luminous applies high voltage in the period that induction coil 5 is prolonging.This makes and possibly prevent to the circuit part stress application.At least increase to given voltage owing to locate twice recovery, the first startup incubation period T1 up to the output voltage V dc of DC power supply circuit 1, therefore possibly prevent that output voltage V dc from increasing to high level, and prevent to the circuit part stress application in the time of restarting.

[0049]-217412

(the 6th embodiment)

Now, will be referring to figures 16 to 17 descriptions sense light luminaire according to a sixth embodiment of the invention.Because the basic configuration of present embodiment and the basic configuration of the 5th embodiment are shared, therefore shared part is specified by similar reference character, and will in description, omit.As visible among Figure 16, the characteristics of the luminaire of present embodiment are only to provide self-protection circuit 33 control signal to starting timing control circuit 500.Protective circuit 33 can have with the 5th embodiment in the identical configuration of configuration, perhaps have other can carry out with the 5th embodiment in configuration in the scope of protective circuit 33 identical functions that adopt.

[0050]-217412

Now, will the operation according to the luminaire of present embodiment be described with reference to Figure 17.If beginning provides electric current from commercial power AC to DC power supply circuit 1, then carry out and control operation identical in the 5th embodiment, incubation period T1, second starts incubation period T2 and startup T3 in period starts sense light 6 to start through first.If starting the time passed through appointment period among the T3 sense light 6 do not have luminous, then protective circuit 33 play with the 5th embodiment in identical effect.Because in the present embodiment, only the control signal of protective circuit 33 is provided, does not therefore stop the operation of DC power supply circuit 1 and high-frequency power supply circuit 2 to starting timing control circuit 500.Therefore, startup T3 in period marches to first startup incubation period T1 and obstructed overprotection T5 in period.If, then confirm to exist no-load condition through the function of halt circuit 90 to above-mentioned continued operation triplicate.As a result, stop operation to DC power supply circuit 1 and high-frequency power supply circuit 2 fully with protective circuit.

[0051]-217412

As stated, startup marches to first period and starts incubation period T1 and not through protection T5 in period.This has eliminated the possibility like in a second embodiment the situation of operating high-frequency power supply circuit 2 off and on.Therefore, possibly reduce the noise that generates by discontinuous operation.

[0062]-217412

Different with common electrode type discharge lamp, when starting sense light 6, need bulb 61 and induction coil 5 be regarded as individual unit.Sense light 6 discharges in following two kinds of patterns.If apply high frequency voltage to induction coil 5, then the pipe arm through induction coil 5 and sense light 6 excites the gas that exists in the bulb 6, discharges as pilot thereby generate high-frequency electric field discharge (being referred to as hereinafter, " E discharge ").This causes glow discharge state.After this, if apply the high frequency voltage of high level, then generate electromagnetic field of high frequency discharge (being referred to as hereinafter, " H discharge ") so that sense light 6 is luminous to induction coil 5.This causes stable arc discharge state.

[0053]-217412

The E discharge at first will be described.Through E discharge, mean the flow through static capacity of tube wall of sense light 6 of discharging current.If apply high frequency voltage to induction coil 5, then excite the gas that exists in the bulb 6 through the static capacity of induction coil 5 and the tube wall of sense light 6, thus emission light.This discharge is as trace discharge (or glow discharge).The transition to main discharge will take place in the time of will rising to the high frequency voltage that induction coil 5 applies.

[0054]-217412

Next, the H discharge will be described.Through the H discharge, it means that the electromagnetic induction through induction coil 5 causes faradic flowing.Can it be regarded as transformer, in said transformer, induction coil 5 is as the multiturn primary coil, and the plasma ring that in bulb 61, generates is as a circle secondary coil.In this regard, the effect of the photoemissive main discharge of facilitating in the sense light 6 (arc discharge) is played in the H discharge.

[0055]-217412

In above-mentioned respective embodiments, during the second startup incubation period T2, in induction coil 5, generate the E discharge through applying the identical high frequency voltage of level that does not generate the H discharge with generating the E discharge.During starting T3 in period, in induction coil 5, generate H discharge and luminous sense light 6 through applying with the identical high frequency voltage of level that generates the H discharge.This makes to start second and generates the E discharge among the incubation period T2, even has some changes in the situation around, for example dark local or low temperature.In addition, after the transition that starts T3 in period occurs in E discharge generation.This makes and possibly generate the H discharge immediately and during applying high voltage to induction coil 5, shorten startup T3 in period.Therefore, the situation that starts sense light 6 with the startup incubation period is not provided is compared, and promotes the startability of sense light 6 and reduce the stress that applies to circuit part to have become possibility.

(the 7th embodiment)

Because the basic configuration of present embodiment and the basic configuration of the 4th embodiment are shared, therefore shared part is specified by similar reference character, and will in description, omit.

The difference of present embodiment and the 4th embodiment is the configuration of the scanning circuit 31 of control circuit 3, as visible among Figure 18.

The difference of the scanning circuit 31 of present embodiment and the scanning circuit 31 of the 4th embodiment is to have increased switch SW 100 and resistance R 100, and said switch and resistance are connected in parallel to capacitor C 2.Scanning circuit 31 further is equipped with the switch control unit (not shown), is used for switch property ground control switch SW, SW1 and SW2.

Utilize this configuration, locate off switch SW100 in the transit time of the first startup incubation period T1, compare with the 4th embodiment thus, frequency of operation finv reduces more reposefully and coil voltage Vx increases more reposefully.In other words, can be through at the time place that transits to the first startup incubation period T1, the second startup incubation period T2 and startup T3 in period frequency of operation finv being reduced and making coil voltage Vx increase (referring to Figure 19 and 20) gradually.

(the 8th embodiment)

In the present embodiment, through coming control coil voltage Vx to keep constant by the feedback of the detection voltage Vxs of output in the voltage detecting circuit 4.As shown in Figure 21, control unit 100 is connected to the voltage control unit 11 of DC power supply circuit 1 and voltage detecting circuit 4.According to detection voltage Vxs from voltage detecting circuit 4 outputs, control unit 100 control direct voltage Vdc, thus make and can coil voltage Vx be remained on the steady state value of appointment.This makes possibly eliminate by the part of coupler section or the caused influence of variation of metal-back.In addition, can be through coil voltage Vx being remained on the constant startability of improving sense light 6.

With reference to Figure 22, start each that incubation period T1 and second starts among the incubation period T2 first, increase gradually through the output voltage V dc that makes DC power supply circuit 1 coil voltage Vx is increased gradually.

In the embodiment of above-mentioned correspondence, DC power supply circuit 1 can be other DC power supply circuit of being known in the art, the transducer that for example boosts-hinder, and it is for hindering the combination of transducer and boost converter.As the power supply of DC power supply circuit 1, possibly use battery to replace AC power AC, in this case, can omit diode bridge DB.In addition, can the integrated circuit of being known in the art be used for control circuit 3.

Utilize the sense light luminaire of the foregoing description, can be through for example, sense light 6 and coupler 50 are contained in the shell 71 of the suitable shape shown in Figure 23 and 24 and form lighting device 7.Can realize said shell 71 and lighting device 7 through the technology that people knew, therefore, with omitting detailed explanation and description.

Compare with the discharge lamp with installation electrode within it, sense light 6 has the life-span of prolongation, and is difficult for impaired.Therefore, preferentially with induction 6 as the light source that is arranged in such as the lighting device in the place that is difficult to safeguard in tunnel.The sense light luminaire of more than describing can be used for lighting device 7 uses tunnel illumination, that have the structure shown in Figure 25 A to 25C.Hereinafter, will describe lighting device 7 in detail with reference to figure 25A to 25C.Term used herein " vertically " refers to the direction among Figure 25 A with " laterally ".Vertical direction among Figure 25 C refers to direction back and forth.

Shown in Figure 25 A to 25C, lighting device 7 is equipped with the shell 71 that has comprised by the cuboid 71a that processes such as stainless steel, and its front end is an opening; And by for example by such as toughened glass or or the like the lid 71b that processes of transparent material, it is designed to the sealing body 71a that can open.Be fixed in body 71a interior bottom surface for the cross section is the reflector plate 71c of U-shaped shape, it is used for the guiding of the light of sense light 6 at forward direction.Reflector plate 71c is processed by for example aluminium.The light that is contained in the sense light 6 in the shell 71 is passed through to cover 71b to front projection.Be fixed on equally body 71a interior bottom surface for being used to adhere to the coupler 50 of sense light 6; Chest 10, it is used for the sense light luminaire is remained on said device; And terminal substrate 8, it is electrically connected to DC power supply circuit 1 in chest 10.Electric wire (not shown) one end is connected to AC power AC, and the other end is connected to terminal substrate 8.Therefore, DC power supply circuit 1 is electrically connected to alternating current AC through electric wire and terminal substrate 8.Cable jack 71d has formed and being communicated with of terminal substrate 8 wire connecting in the base wall of body 71a through said hole, to extend in vertical direction.The top of lid 71b is connected with the upper part of body 71a through hinge 71e.Therefore, lid 71a can rotate in transverse plane as described below with respect to body 71a, said transverse plane be located at wherein with body 71a shown in Figure 25 A to 25C the enclosure portion that keeps shut and therein body 71a between the open position of front opening.To be used for the low side that latch 71f that the end portion with lid 71b is locked in enclosure portion is installed in body 71a.Hinge 71e and latch 71f can be realized by technology that people knew, and therefore will omit detailed explanation and description.To be used for shell 71 be fixed to wall surface for example or or the like the installation foot 71g of installation surface (not shown) be attached to surface behind the body 71a with space apart relationship laterally.Said installation foot 71g is processed by for example steel plate.The top and bottom part of each installation foot 71g is upwards outstanding with downwards from body 71a.In each ledge of installation foot 71g, be formed on the upwardly extending screw insertion hole 71h in side back and forth.Through each screw (not shown) that is inserted into screw insertion hole 71h shell 71 is fixed to installation surface, and the shell screw threadization be coupled to installation surface.

In above-mentioned various types of lighting devices 7; The battery (not shown) can be included in the shell 71; Thereby make DC power supply circuit 1 when commercial power lost efficacy, to use battery as power supply; Can realize lighting apparatus 7 through technique known, therefore, with omitting its detailed explanation and description.

Although illustrated and described the present invention according to preferred embodiment, what it will be understood to those of skill in the art that is under the situation of the scope of the invention that can in not breaking away from following claim, be limited, and has variations and modifications.

Claims

1. sense light luminaire comprises:

Induction coil is arranged as and is adjacent to sense light;

DC power supply circuit is used for output dc voltage;

2. sense light luminaire as claimed in claim 1; Also comprise protective circuit; Be used for detecting unusual in the process of supplying said alternating voltage from said high-frequency power supply circuit to said induction coil, and in case detect unusually, then be used for repeating at least continuously said startup beamhouse operation and said start-up operation; Said protective circuit is used for beginning once more said startup beamhouse operation, up to the value that increases to appointment at the said direct voltage that detects said unusual back decline.

3. according to claim 1 or claim 2 sense light luminaire; Wherein, Said startup beamhouse operation comprises the first startup beamhouse operation and the second startup beamhouse operation of after said first starts the beamhouse operation termination, carrying out at least, carries out the said first startup beamhouse operation and reaches designated value up to said alternating voltage at least, starts in the beamhouse operation said first; Said high-frequency power supply circuit is used for to said induction coil supply high frequency voltage; This high frequency voltage makes to start the voltage that is no more than appointment from the said direct voltage of said DC power supply circuit output in the beamhouse operation said second enough greatly to apply load to said DC power supply circuit; Said high-frequency power supply circuit is used for applying high frequency voltage to said induction coil; This high frequency voltage is greater than at said first the said alternating voltage from the beamhouse operation to said induction coil output that start in, and this high frequency voltage is arranged to high as far as possible in the scope that does not start said sense light, and said control circuit is used for executive control operation; Make when said first starts beamhouse operation and proceed to the said second startup beamhouse operation, be supplied to the high frequency voltage of said induction coil gently to increase.

4. sense light luminaire as claimed in claim 3; Wherein, said control circuit is used for executive control operation, makes to start in the beamhouse operation said second; The high-frequency electric field discharge voltage that will be used to generate the high-frequency electric field discharge is applied to said induction coil; Discharge up to generating said high-frequency electric field, and make in said start-up operation, will be used to generate the electromagnetic field of high frequency discharge voltage that discharges the electromagnetic field of high frequency and be applied to said induction coil.

5. according to claim 1 or claim 2 sense light luminaire wherein, is carried out said startup beamhouse operation through reducing frequency of operation gradually.

6. according to claim 1 or claim 2 sense light luminaire wherein, is carried out said startup beamhouse operation through increasing gradually from the said direct voltage of said DC power supply circuit output.

7. a lighting device comprises sense light luminaire as claimed in claim 5.

8. a lighting device comprises sense light luminaire as claimed in claim 6.

9. sense light luminaire comprises:

Induction coil is arranged as and is adjacent to sense light;

DC power supply circuit is used for output dc voltage;