CN1695404B - High-pressure discharge lamp operation device and illumination appliance having the same - Google Patents

Abstract

A full bridge circuit composed of four switching elements (Q1 to Q4) is alternated with a high switching frequency and a series-connected resonance circuit composed of an inductor (L2) and a capacitor (C2) is made to resonate for a switching frequency of the full bridge circuit multiplied by an integer (for example, frequency multiplied by three), thereby generating a high voltage pulse for start. After a high-pressure discharge lamp is started, the full bridge circuit is alternated with a low switching frequency so as to operate as a step-down chopper for inverting the output polarity, thereby stably supplying rectangular wave voltage of low frequency to the high-pressure discharge lamp (DL) via a filter circuit composed of an inductor (L1) and a capacitor (C1).

Description

High pressure discharge lamp lighting apparatus and the light fixture that is equipped with high pressure discharge lamp lighting apparatus

Technical field

The present invention relates to the lamp device of high-pressure discharge lamp and be equipped with the light fixture of lamp device, more particularly, relate to electrion lamp device that can be connected to power circuit in the crawl space or analog and the light fixture that is equipped with this electrion lamp device.

Background technology

A kind of habitual light fixture that uses after being connected to the power circuit that is arranged on ceiling or the analog is arranged.This light fixture comprises a lamp and a step-down transformer part that plays the effect of lighting lamp.But,, be independent of in the shell that lamp arranges so step-down transformer left in, and step-down transformer be arranged in the power circuit below because that the size of step-down transformer does not have is little of making step-down transformer to leave in the power circuit.Therefore, lamp and shell expose unfriendly and dangle below power circuit.As the sagging method of the circuit that reduces the step-down transformer part with limit shell, known have following two kinds of methods, promptly, a kind of be reduce step-down transformer part circuit method and a kind of be that the structure of printed circuit board (PCB) of electronic unit of design and installation step-down transformer part is with the method for the size that reduces the step-down transformer part.

In these two kinds of solutions, a kind of light fixture has been proposed in JP11-111040A, this light fixture comprises and has reduced size to have the step-down transformer of good appearance when being connected to power circuit.But this light fixture uses the incandescent lamp lighted by step-down transformer and Halogen lamp LED as lamp.On the other hand, the light fixture of the high-pressure discharge lamp use such as HID (high intensity discharge) lamp exists because (will illustrate as following) lights the increase in temperature of the big and electronic unit of number of components that the complicated circuit configuration of the device of high-pressure discharge lamp causes, and can not reduce the problem of size greatly.

Figure 28 shows a kind of basic circuit of habitual high pressure discharge lamp lighting apparatus.This device comprises a rectification circuit 92 that comprises boost chopper, a power control circuit 97 that comprises the buck chopper device, a polarity inversion circuit 93 that comprises the full-bridge connection circuit, a high-voltage pulse produces circuit I g, the control circuit 98 of the drive controlling of the switch element Q96 of the control circuit 96 of the drive controlling of the switch element Q95 of an execution boost chopper and an execution buck chopper device.Each circuit below is described.

Rectification circuit 92 comprises that comprises an inductor L93, diode D95, capacitor C95, the switch element Q95 such as MOSFET (Metal Oxide Silicon Field Effect Transistor) and the so-called boost chopper of bridge rectifier D B.The full rectification of bridge rectifier D B is from the AC voltage of commercial AC power supply AC, to produce pulsating flow voltage.Boost chopper becomes dc voltage with the pulsating flow voltage transitions that bridge rectifier D B produces, with output dc voltage.

Power control circuit 97 comprises the open/close switch element Q96 such as MOSFET with tens of KHz, diode D96, and inductor L94 and capacitor C96, its output current is a chopped waveform.Induction depends on from the induced potential of the output current of power control circuit 97 outputs on the secondary winding of inductor L94.Induced potential is input to control circuit 98 by the resistor R 94 that is connected in series.Control circuit 98 is carried out the invert on zero of crossing of switch element Q96 and is controlled according to the voltage of importing from the secondary winding of inductor L94.Capacitor C96 is used for removing harmonic component from the output current of the elementary winding of inductor L94.

Polarity inversion circuit 93 is by comprising the full-bridge circuit of the switch element Q91 to Q94 such as MOSFET, to convert the square wave AC voltage of low frequency from the dc voltage of power control circuit 97 to, and square wave AC voltage will be provided to high-pressure discharge lamp DL with hundreds of Hz.

High-voltage pulse produces circuit I g and is used to produce high-voltage pulse, causing the dielectric breakdown between the high-pressure discharge lamp DL electrode, and is used to start high-pressure discharge lamp DL.After high-pressure discharge lamp DL started, high-voltage pulse produced the operation suspension of circuit I g.

Disclosed the light fixture that comprises the high-pressure discharge lamp DL that lights by lamp device among the JP14-75045A.Hope becomes littler with the circuit of lamp device, so that reduce the size of light fixture.

On the other hand, disclosed a kind of structure of printed circuit board (PCB) of design and installation electronic unit among the JP5-327161A with the method for the size that reduces electronic circuit module, as another kind of solution.It has the structure that a kind of auxiliary circuit board is arranged perpendicular to main circuit board.Auxiliary circuit board has a pair of from the outstanding substrate support part of vertical two side direction main circuit boards, and main circuit board has fixing hole, and the substrate support of auxiliary circuit board is partly passed fixing hole.When auxiliary circuit board was installed to main circuit board, substrate support partly was inserted in the fixing hole, thereby can be vertically fixed to main circuit board to auxiliary circuit board.By this way, can be installed to the electronic unit three-dimensional that will be installed to printed circuit board (PCB) on main circuit board and the auxiliary circuit board, therefore can reduce the size of electronic circuit module.

But, in this mounting structure, a plurality of pads (terminal pads) of arranging along the long limit of auxiliary circuit board be welded on parts surface one side of main circuit board at a plurality of pads that the upper surface of main circuit board is arranged.For this reason, for example, on the parts surface that auxiliary circuit board is installed to main circuit board in, the face of weld of main circuit board is immersed solder bath, under the situation of component leads with the welding main circuit board, can not simultaneously auxiliary circuit board be connected to main circuit board with parts.Nature even in this mounting structure, is shown if all parts on the main circuit board all are installed in going up of main circuit board simultaneously with auxiliary circuit board, can carry out the welding of main circuit board upper-part and the welding of auxiliary circuit board and main circuit board simultaneously so.

But, as pointing out in the list of references, when having finished mounted on surface, carry out reflow soldering, so the heating of reflow soldering causes another problem, for example, be installed in the location mistake of the parts on the auxiliary circuit board.In order to prevent to locate mistake, need another that parts are remained on the auxiliary circuit board member with the location mistake that prevents parts, this causes cost to improve.The substrate support of auxiliary circuit board partly is easy to fracture.If substrate support partly ruptures, all substrates all can not use so.In addition, because auxiliary circuit board is installed in the upper surface (surface of electronic unit is installed) of main circuit board, so the pad of auxiliary circuit board is positioned at the top of the upper surface of main circuit board.Therefore, the electronic unit that be installed on the auxiliary circuit board is installed on pad top and the position away from the main circuit board upper surface, thereby auxiliary circuit board is difficult to diminish from the outstanding height of the upper surface of main circuit board.For this reason, can not easily reduce the size of the electronic circuit module at electronic unit place.

The present invention considers that the problems referred to above make, and its objective is high pressure discharge lamp lighting apparatus that a kind of compactness will be provided and the light fixture that is equipped with high pressure discharge lamp lighting apparatus.

Summary of the invention

In order to achieve the above object, the device of lighting high-pressure discharge lamp according to the present invention comprises the DC power supply; Has first switch element that is connected to the on high-tension side terminals of DC power supply; Second switch element with terminals of a low-pressure side that is connected to the DC power supply; Has the 3rd switch element that is connected to the on high-tension side terminals of DC power supply; The 4th switch element with terminals of a low-pressure side that is connected to the DC power supply; Have the terminals of another terminals that are connected to first and second switch elements and be connected to first inductor of another terminals of an end of high-pressure discharge lamp; The mid portion of a winding that is connected first inductor constitutes first capacitor of one the first connection resonant circuit of connecting between DC power source voltage side and with first inductor; Have the terminals of terminals that are connected to first inductor and be connected to second capacitor of another terminals of another terminals of high-pressure discharge lamp; Have the terminals of another terminals that are connected to third and fourth switch element and be connected to second inductor of terminals of another terminals of second capacitor; With a control circuit of opening and closing that is used to control first to fourth switch element.In this configuration, before high-pressure discharge lamp starts, control circuit is controlled with first control model, first control model is with a kind of intended conversion frequency, the pattern of alternately changing between the first and the 4th switch element is connected and the second and the 3rd switch element disconnects state and the first and the 4th switch element disconnects and the second and the 3rd switch element is connected state.In first control model, first series resonant circuit is with the frequency resonance of the integral multiple of inversion frequency, to produce the high pressure that starts high-pressure discharge lamp.

After high-pressure discharge lamp starts, control circuit can be carried out control with second control model, second control model is the pattern of alternately changing between a kind of operation and another kind of operation with low frequency, described a kind of operation is with the alternately operation of conversion between the state of high-frequency at least one disconnection in state that the first and the 4th switch element is connected simultaneously and the first and the 4th switch element, and described another kind of operation is the operation of alternately changing between the state with high-frequency at least one disconnection in state that the second and the 3rd switch element is connected simultaneously and the second and the 3rd switch element.

As selection,, comprise the DC power supply according to the device of lighting high-pressure discharge lamp of the present invention; Has on high-tension side terminals first switch element that is connected to the DC power supply; Second switch element with terminals of a low-pressure side that is connected to the DC power supply; Have the terminals of another terminals that are connected to first and second switch elements and be connected to first inductor of another terminals of terminals of high-pressure discharge lamp; Be connected between the low-pressure side of the mid portion of a winding of first inductor and DC power supply, and constituted first capacitor of one first series resonant circuit with first inductor; Have the terminals of terminals that are connected to first inductor and be connected to second capacitor of another terminals of another terminals of high-pressure discharge lamp; Second inductor with terminals of another terminals that are connected to second capacitor; Be connected the 3rd capacitor between another terminals of the high-pressure side of DC power supply and second inductor; Be connected the 4th capacitor between another terminals of the low-pressure side of DC power supply and second inductor; The control circuit of opening and closing with control first and second switch elements.Before high-pressure discharge lamp starts, control circuit is controlled with first control model, first control model is with the intended conversion frequency, first switch element is connected and the second switch element disconnects the state and first switch element disconnect and second switch element switches state between the pattern alternately changed.In first control model, first series resonant circuit is with the frequency resonance of the integral multiple of inversion frequency, to produce the high voltage that starts high-pressure discharge lamp.

After high-pressure discharge lamp starts, control circuit can be carried out control with second control model, and second control model is the pattern of alternately changing between the operation of opening and closing of controlling first switch element with high frequency and the operation of opening and closing with high frequency control second switch element with first low frequency.

Inversion frequency can be lower than the resonance frequency of first series resonant circuit and be higher than the resonance frequency of second series resonant circuit that comprises second inductor and second capacitor.

In first control model, the frequency of the high pressure that first series resonant circuit produces can be (2n+1) times (n is a natural number) of inversion frequency.

Inversion frequency can be higher than the twice of the resonance frequency of second series resonant circuit that comprises second inductor and second capacitor.

According to above-mentioned high pressure discharge lamp lighting apparatus, because resonance potential raise to be to carry out corresponding to the frequency of the integral multiple of the inversion frequency of switch element, so can reduce the size of resonant inductor significantly, and can make the size of high pressure discharge lamp lighting apparatus and cost less than habitual high pressure discharge lamp lighting apparatus.In addition, because the inversion frequency and the habitual inversion frequency of switch element are as broad as long, increase so can prevent conversion loss.

In first control model, control circuit can change inversion frequency according to the time.Therefore, even can obtain, also can produce the advantage of stable high-voltage pulse because the fluctuation of parts causes the frequency characteristic of the impedance of first series resonant circuit to change.

The variable range of inversion frequency can so be set, make the resonance frequency of the series resonant circuit of winning be included in integral multiple from the lower limit of variable range in the scope of the integral multiple of the upper limit of variable range.Therefore, even can obtain, also can easily produce the advantage that has to the stable high-voltage pulse of voltage because the fluctuation of parts causes the frequency characteristic of the impedance of series resonant circuit to change.

In addition, the frequency corresponding to the integral multiple of inversion frequency can be (2N+1) doubly inversion frequency of (n is a natural number).Therefore, be inversion frequency (2n+1) doubly the variable range of the frequency of (n is a natural number) comprise the resonance frequency of first series resonant circuit, and can relatively easily change inversion frequency, make it possible to produce (2n+1) frequency doubly.Can obtain stably to produce the advantage of high-voltage pulse.

Can three times inversion frequency corresponding to the frequency of the integral multiple of inversion frequency.Therefore, the high-voltage pulse that can produce than the frequency in integral multiple (three times or more many times) inversion frequency more easily produces and has the high-voltage pulse of the voltage of habitual high-voltage pulse no better than.For this reason, can keep equaling the startup ability of the level of habitual startup ability.

In addition, control circuit can have a digital arithmetic processing circuit, and inversion frequency can change discretely by digital arithmetic processing circuit.Therefore, the unidirectional reduction that frequency not only can easily be set changes, and the number of times that repeats with constant frequency can easily be set.

Control circuit can have the simulation arithmetic processing circuit, and can change inversion frequency continuously by the simulation arithmetic processing circuit.Therefore, frequency can be changed continuously, and the advantage of the high-voltage pulse that obtains from the impedance operator of first series resonant circuit can be obtained to produce reliably.

In addition, first and second switch elements are with about 50% duty factor PWM control, and first and second switch elements alternately repeat to switch on and off operation with the time interval that equates.Therefore, can produce the control signal of switch element by simple control circuit, and can obtain to realize reducing the size of high pressure discharge lamp lighting apparatus and the advantage of cost.

First inductor can have a kind of transformer device structure that has elementary winding and secondary winding, terminals of elementary winding are connected to terminals of secondary winding, and first capacitor can be connected to the tie point between elementary winding and the secondary winding.By this way, can rely on a little inductor to produce and light the required high-voltage pulse of lamp, and can obtain to reduce the size of high pressure discharge lamp lighting apparatus and the advantage of cost.

First inductor can have a kind of transformer device structure that has elementary winding and secondary winding, and the ratio of the number of turn of elementary winding and secondary winding can be by 1: N (N＞1) provides.Therefore, the first series resonance voltage that is used to produce high-voltage pulse can be lower, and can reduce resonance current.For this reason, can obtain to reduce to constitute the advantage of the size of first inductor of first series resonant circuit and first capacitor.

In addition, first inductor has a kind of elementary winding and secondary winding of having, and elementary winding is made of twisted wire, the transformer device structure that secondary winding is made of single cord.Therefore, can reduce elementary winding at the resistance of high frequency region with reduce the DC resistance of secondary winding.Can utilize a little transformer to produce and light the required high-voltage pulse of discharge lamp, and can obtain to suppress the advantage of the heat that transformer produces under the high-pressure discharge lamp on-state.

Lamp device may further include a start-up detector that is used to detect the startup of high-pressure discharge lamp.When start-up detector detected the startup of high-pressure discharge lamp, control circuit was carried out control with the 3rd control model.The 3rd control model with low frequency in alternately conversion between the following operation: one with the operation of conversion sequentially between state that the first and the 4th switch element is connected simultaneously, the state of a disconnection in the first and the 4th switch element and state that the first and the 4th switch element all disconnects of high frequency; And one with the operation of conversion sequentially between state that the second and the 3rd switch element is connected simultaneously, the state of a disconnection in the second and the 3rd switch element and state that the second and the 3rd switch element all disconnects of high frequency.Therefore, can obtain to prevent that labile state that the lamp current that produces after the high-pressure discharge lamp lighting and then stops from making the advantage that illuminating state is stable.

In the time of can after detecting the high-pressure discharge lamp startup, having pass by predetermined period of time, carry out from the conversion operations of first control model to the, three control models.Therefore, can obtain after detecting the illuminating state of high-pressure discharge lamp, when high-pressure discharge lamp had disconnected up to the past predetermined period of time, can produce the advantage of high-voltage pulse once more.

Can detect after high-pressure discharge lamp starts, the past during predetermined period of time, carry out from the conversion operations of first control model to the, three control models.Therefore, can reduce after the high-pressure discharge lamp lighting and then the impedance operator between the electric bridge and higher electric current can be provided to high-pressure discharge lamp, and the advantage of the labile state that can obtain to prevent that electric current mobile in the high-pressure discharge lamp from stopping.

Main circuit board and the auxiliary circuit board that is included in the electronic unit in the high pressure discharge lamp lighting apparatus above may further include, is installed lamp device.On the upper and lower surface of the bottom of auxiliary circuit board, form the pad that is solder-connected to main circuit board.Can in main circuit board, form a narrow slit that inserts auxiliary circuit board and support auxiliary circuit board.Narrow slit can have one have first width and be electrically connected to the part of auxiliary circuit board and one have no better than or less than the part of second width of the thickness of auxiliary circuit board.First width can be greater than second width.By this way, the solder pad arrangements of auxiliary circuit board can carried out on the surface of welding, rather than be arranged on the surface of the parts that main circuit board is installed, effectively utilized the space of component leads of the main circuit board of face of weld one side that is projected into main circuit board, make it possible to reduce auxiliary circuit board from the outstanding height of the upper surface of main circuit board, and can realize the high pressure discharge lamp lighting apparatus of low section.Auxiliary circuit board is being inserted and is being connected in the step of main circuit board, can prevent that auxiliary circuit board falls before the welding auxiliary circuit board.Can further reduce manufacturing cost and component costs.

Can and be installed in the space between the electronic unit on the auxiliary circuit board at the pad of the bottom that is formed on auxiliary circuit board, and on the upper and lower surface of auxiliary circuit board, form further jut, when auxiliary circuit board was inserted main circuit board, these juts can contact the surface of main circuit board.For this reason, jut supports auxiliary circuit board, makes it possible to make auxiliary circuit board in any anchor clamps ground, and can reduce manufacturing cost and component costs further.

Jut can comprise a bar that is penetrated into the hole of lower surface from upper surface that almost vertically passes in the auxiliary circuit board.Therefore, jut be can form, and manufacturing cost and component costs reduced further again with simple structure.

Jut can comprise that one is arranged in upper and lower lip-deep other electronic unit that is installed in auxiliary circuit board and the electronic unit between the pad.Therefore, this electronic unit also can play the effect of jut, and the special member that can not be used as jut supports auxiliary circuit board.

Jut can comprise the U-clevis tool of at least one end longitudinally that is fixed to auxiliary circuit board, makes anchor clamps be clamped on the upper and lower surface of auxiliary circuit board.Therefore, can make auxiliary circuit board and anchor clamps on a large scale, and can reduce manufacturing cost and component costs.As a result, can reduce device size and cost.

Weld tabs can be formed on the position of upper and lower lip-deep symmetry of auxiliary circuit board.Therefore, the biasing of the stress that produces in the auxiliary circuit board can be suppressed to be welded on, and auxiliary circuit board can be more firmly connected.

In addition, the pad that is formed on the symmetric position on upper and lower surface of bottom of auxiliary circuit board can have identical current potential.Therefore, the wiring on the main circuit board can be very tiny, and can realize resisting the strong circuit of external noise ability.

Lamp device may further include to be connected in series to high-pressure discharge lamp and to be installed in being used on the auxiliary circuit board exports the variable resistor of control.When being inserted into auxiliary circuit board on the main circuit board, output control variable resistor can be positioned at than on the position with respect to the surface of the more close main circuit board of intermediate point of the height of the highest part of the auxiliary circuit board on the surface of main circuit board.Therefore, when the variable-resistance resistance value of control output control, can reduce the radius of moment, and reduce the stress on the welding portion that acts between auxiliary circuit board and the main circuit board.

Be formed on electric wire wiring figure on the auxiliary circuit board and can comprise that a part that is applied in low-voltage and one are applied in high-tension part, and being applied on peripheral part that high-tension part is formed on auxiliary circuit board.Therefore, even in little high pressure discharge lamp lighting apparatus, also can realize being not easy to carry out the control circuit of the faulty operation that causes owing to himself noise.

Auxiliary circuit board can be arranged near main circuit board peripheral part.Therefore, can will be suppressed to very low level from the heat that is installed in the electronic circuit on the auxiliary circuit board.

Light fixture according to the present invention comprises high pressure discharge lamp lighting apparatus and the high-pressure discharge lamp of lighting by high pressure discharge lamp lighting apparatus.Therefore, can realize undersized light fixture, and can obtain to improve the advantage that the degree of freedom is installed significantly.Therefore, the light fixture that can realize having preferred outward appearance and use high-pressure discharge lamp.

Description of drawings

Fig. 1 is the circuit diagram according to first embodiment of the invention;

Fig. 2 A is the curve chart that is presented at the waveform of the drive signal that is provided to switch element Q1 in the start-up mode;

Fig. 2 B is the curve chart that is presented at the waveform of the drive signal that is provided to switch element Q2 in the start-up mode;

Fig. 2 C is the curve chart that is presented in the start-up mode from the waveform of the voltage of inductor L2 output;

Fig. 3 A is the curve chart that is presented at the waveform of the drive signal that is provided to switch element Q1 in the low pressure ignition mode;

Fig. 3 B is the curve chart that is presented at the waveform of the drive signal that is provided to switch element Q2 in the low pressure ignition mode;

Fig. 3 C is the curve chart that is presented at the waveform of the drive signal that is provided to switch element Q3 in the low pressure ignition mode;

Fig. 3 D is the curve chart that is presented at the waveform of the drive signal that is provided to switch element Q4 in the low pressure ignition mode;

Fig. 3 E is the curve chart that is presented at the waveform of the electric current that flows among the lamp DL in the low pressure ignition mode;

Fig. 4 A is the curve chart that is presented at the waveform of stablizing the drive signal that is provided to switch element Q1 in the ignition mode;

Fig. 4 B is the curve chart that is presented at the waveform of stablizing the drive signal that is provided to switch element Q2 in the ignition mode;

Fig. 4 C is the curve chart that is presented at the waveform of stablizing the drive signal that is provided to switch element Q3 in the ignition mode;

Fig. 4 D is the curve chart that is presented at the waveform of stablizing the drive signal that is provided to switch element Q4 in the ignition mode;

Fig. 4 E is the curve chart that is presented at the waveform of stablizing the electric current that flows among the lamp DL in the ignition mode;

Fig. 5 is the power characteristic figure that shows the basic output characteristic of high-pressure discharge lamp;

Fig. 6 is the circuit diagram in second enforcement of the present invention;

Fig. 7 A is the curve chart that is presented at the waveform of the drive signal that is provided to switch element Q1 in the start-up mode;

Fig. 7 B is the curve chart that is presented at the waveform of the drive signal that is provided to switch element Q2 in the start-up mode;

Fig. 7 C is the curve chart that is presented in the start-up mode from the voltage waveform of inductor L2 output;

Fig. 8 A is the curve chart that is presented at the waveform of stablizing the drive signal that is provided to switch element Q1 in the ignition mode;

Fig. 8 B is the curve chart that is presented at the waveform of stablizing the drive signal that is provided to switch element Q2 in the ignition mode;

Fig. 8 C is the curve chart that is presented at the waveform of stablizing the electric current that flows among the lamp DL in the ignition mode;

Fig. 9 is the circuit diagram of a third embodiment in accordance with the invention;

Figure 10 A is the curve chart that is presented at the waveform of the drive signal that is provided to switch element Q1 in the start-up mode;

Figure 10 B is the curve chart that is presented at the waveform of the drive signal that is provided to switch element Q2 in the start-up mode;

Figure 10 C is the curve chart that is presented at the waveform of the drive signal that is provided to switch element Q3 in the start-up mode;

Figure 10 D is the curve chart that is presented at the waveform of the drive signal that is provided to switch element Q4 in the start-up mode;

Figure 10 E is the curve chart that is presented in the start-up mode from the voltage waveform of inductor L2 output;

Figure 11 is the frequency characteristic figure that shows an operation in the start-up mode;

Figure 12 A shows in the fourth embodiment of the present invention, is provided to the curve chart of waveform of the drive signal of switch element Q1 in start-up mode;

Figure 12 B is the curve chart that shows the waveform of the drive signal that is provided to switch element Q2 in the start-up mode;

Figure 12 C is the curve chart that shows the waveform of the drive signal that is provided to switch element Q3 in the start-up mode;

Figure 12 D is the curve chart that shows the waveform of the drive signal that is provided to switch element Q4 in the start-up mode;

Figure 12 E is the curve chart that shows the waveform of the voltage of inductor L2 output in the start-up mode;

Figure 13 is the frequency characteristic figure that is presented at an operation in the start-up mode;

Figure 14 is the view that explanation utilizes the frequency shift operation of microcomputer;

Figure 15 is the circuit diagram of the fifth embodiment of the present invention;

Figure 16 is the circuit diagram that shows a kind of modification of resonant circuit;

Figure 17 is the circuit diagram of the transformer in the resonant circuit of display update;

Figure 19 is the circuit diagram that shows the another kind modification of resonant circuit;

Figure 20 is the perspective view that shows the outward appearance of the sixth embodiment of the present invention;

Figure 21 A is the front view of the main circuit board when face of weld one side is seen;

Figure 21 B is the end view of auxiliary circuit board;

Figure 21 C is the front view of auxiliary circuit board;

Figure 22 A is the front view of the auxiliary circuit board of the seventh embodiment of the present invention;

Figure 22 B is the end view that auxiliary circuit board is inserted into the state of main circuit board;

Figure 23 A shows the auxiliary circuit board front view with other jut;

Figure 23 B shows that the auxiliary circuit board with other jut is inserted into the end view of the state in the main circuit board;

Figure 24 A is the front view with auxiliary circuit board of other jut;

Figure 24 B shows that the auxiliary circuit board with other jut is inserted into the end view of the state in the main circuit board;

Figure 25 A is the front view that shows the auxiliary circuit board with different juts;

Figure 25 B shows that the auxiliary circuit board with different juts is inserted into the end view of the state of main circuit board;

Figure 25 C is the perspective view of different juts;

Figure 26 A is the front view of the auxiliary circuit board of eighth embodiment of the invention;

Figure 26 B is presented under the state that auxiliary circuit board is inserted into main circuit board, controls the end view of a kind of mode of variable-resistance resistance value;

Figure 27 A is the front view of parts surface one side that shows first auxiliary circuit board of the ninth embodiment of the present invention;

Figure 27 B is the rearview that shows the wiring figure of first auxiliary circuit board;

Figure 27 C is the front view that shows the parts surface of second auxiliary circuit board;

Figure 27 D is the rearview that shows the wiring figure of second auxiliary circuit board; With

Figure 28 is the circuit diagram that shows the basic configuration of habitual high pressure discharge lamp lighting apparatus.

Embodiment

Below with reference to the description of drawings embodiments of the invention.In the accompanying drawings, the element with same reference numerals has identical functions.

First embodiment

Fig. 1 is the circuit diagram according to first embodiment of high pressure discharge lamp lighting apparatus of the present invention.High pressure discharge lamp lighting apparatus according to present embodiment comprises AC power supplies 1, rectification circuit 2, and lighting circuit 3, control circuit 4, resonant circuit 5 and power factor are corrected (PFC) controller 6.

Rectification circuit 2 has a bridge rectifier D B who is connected to AC power supplies 1 by noise filter circuit and line protective devices.Bridge rectifier D B carries out full-wave rectification to the AC voltage that provides from AC power supplies 1, and the AC voltage transitions is become dc voltage.The terminals of inductor L3 are connected to the hot side of the output of bridge rectifier D B.Switch element Q5 such as MOSFET (metal oxide silicon field effect pipe) is connected between another terminals of the low potential side of output and inductor L3.Positive pole one side of diode D5 is connected to the tie point between inductor L3 and the switch element Q5, and capacitor C5 is connected between the negative pole and ground wire of diode D5.Power factor is corrected the waveform of controller 6 according to the dc voltage of exporting from bridge rectifier D B, PWM (pulse-width modulation) signal is sent to switch element Q5, with on switch element Q5, thereby improvement power factor, make in inductor L3 the peak value of the delta current waveform that flows can follow the tracks of the waveform of dc voltage, that is the phase difference between the electric current that reduces to flow among voltage and the inductor L3.

More than illustrated a kind of wherein with AC power supplies 1 and the situation of the rectification circuit 2 that utilizes the chopper circuit scheme as the power supply of lighting circuit 3.Can use any power supply that the DC power supply can be provided lighting circuit 3.For example, can use storage battery or commercial DC power supply.

Lighting circuit 3 has four switch element Q1 to Q4 that are arranged in the full-bridge circuit, will becoming AC power supplies from the DC power source conversion that rectification circuit 2 provides, thereby provides AC electric power to high-pressure discharge lamp (being called " lamp DL " later on).Can will comprise that the MOSFET of the body diode that is used to distribute regenerative current is as each switch element.The terminals of each switch element Q1 to Q3 are connected to the hot side of DC power supply.Another terminals of switch element Q1 are one another in series with the terminals of switch element Q2 and are connected, and another terminals of switch element Q3 are one another in series with the terminals of switch element Q4 and are connected.Another terminals ground connection of switch element Q2 and Q4.Inductor L1 is connected in series between the tie point and lamp DL between switch element Q3 and the Q4, to regulate the load current I that flows among the lamp DL _DLCapacitor and lamp DL are connected in parallel, to remove the load current I that flows among the lamp DL _DLWave component.

Control circuit 4 is used for control switch element Q1 to Q4, makes switch element Q1 to Q4 can carry out the conversion operations of hope.Control circuit 4 comprises 40 and two drive circuits 41 of a control IC (integrated circuit) and 42.Control IC 40 is that the device by the combine digital arithmetic processing of microcomputer and so on constitutes.Drive circuit 41 and 42 is to be made of the drive IC that switches on and off according to the Signal-controlled switch element Q1 to Q4 that imports from control IC 40.

Resonant circuit 5 comprises between the tie point and lamp DL that is connected in series between switch element Q1 and the Q2, the inductor L2 that is used to start the high-voltage pulse of lamp DL with generation, have the capacitor C2 of terminals of mid portion of a winding that is connected to inductor L2 and the resistor R 1 that is connected in series with another terminals of capacitor C2.Inductor L2 and capacitor C2 have constituted a series resonant circuit.In this series resonant circuit, the induction reactance of inductor L2 and the capacitive reactance of capacitor C2 so are set, make it possible to resonance take place at high frequency f2 ≈ 360KHz.Diode D1 and D2 are used to carry out bypass operation, are being used for detecting the load current I that lamp DL flows so that prevent the resonance current that resonant circuit 5 produces _DLCurrent sense resistor R2 in flow.

Below with reference to Fig. 2 to 4, the operation of lighting according to the high pressure discharge lamp lighting apparatus of present embodiment is described.Light to operate to be included in and apply high-voltage pulse between the lamp DL electrode to cause the start-up mode of the dielectric breakdown between the electrode, although but the still very low low pressure ignition mode of voltage between the dielectric breakdown electrode has taken place between the electrode, and the voltage between electrode tip also increases stably to light the stable ignition mode of lamp.The below operation under these patterns of explanation.

(start-up mode)

In order to start lamp DL, must between the electrode of lamp DL, apply high pressure, to cause the dielectric breakdown between the electrode.In this high pressure discharge lamp lighting apparatus, the series resonant circuit that is made of inductor L2 and capacitor C2 is in the frequency resonance of f2 ≈ 360KHz.Therefore, as shown in Figure 2A and 2B, switch element Q1 and Q2 replace on/off with the frequency of 120KHz, and the frequency of 120KHz is the output end voltage V of the secondary winding N2 of the inductor L2 shown in Fig. 2 C _N2Resonance frequency f2 ≈ 360KHz 1/3, its duty factor is about 50%.At this moment, although do not illustrate, switch element Q4 is also in the timing on/off identical with switch element Q1, and switch element Q3 is also in the timing on/off identical with switch element Q2.More particularly, switch element is alternately carried out conversion operations (after this being called " operation A ") to Q1 and Q4 and switch element to Q2 and Q3.

By operation A, produce resonance potential with respect to several KV (kilovolt) of ground connection at the elementary winding N1 of inductor L2 and the tie point between the capacitor C2.In addition, the secondary winding N2 of inductor L2 has improved N1 with resonance potential: N2 times, N1: N2 is the turn ratio of elementary winding N1 and secondary winding N2.The resonance potential that raises is provided to high-pressure discharge lamp DL as high-voltage pulse.When between electrode dielectric breakdown taking place at lamp DL owing to high-voltage pulse, mode shifts is to the low pressure ignition mode.

On the other hand, when even operation A (has for example repeated the number of times that is provided with by control IC 40,50 times) when the dielectric breakdown between the electrode of lamp DL does not take place yet, suspend and apply high-voltage pulse 800 μ sec, with cooling owing to applying the lamp DL that high-voltage pulse is in high temperature.After suspending 800 μ sec, operation A repeats 50 times.When even operation (after this being called " operation B ") that repetition and the pausing operation of combination operation A obtains has repeated also not take place in 20 seconds dielectric breakdown between the electrode of lamp DL, suspend and applied high-voltage pulse 2 minutes, be in the lamp DL of high temperature with cooling.After suspending 2 minutes, executable operations B once more.Even when repetitive operation B 20 seconds and 2 minutes combination of pausing operation had repeated also not take place in 30 minutes dielectric breakdown between the electrode of lamp DL, control IC 40 was suspended the operation of lighting of lamp DL.

The situation of dielectric breakdown below takes place between the electrode of explanation lamp DL under start-up mode.When between the electrode of lamp DL dielectric breakdown taking place, the high-voltage pulse that resonant circuit 5 produces also flows into inductor L1 by lamp DL.The high-voltage pulse that flows into inductor L1 is inducted on inductor L1 secondary winding and is had electric current based on the amplitude of high-voltage pulse.The full-wave rectification of the induced current by diode D3 and D4 provides the detection electric current I _DET, and with electric current I _DETBe input to control IC 40, thereby make control IC 40 can detect the dielectric breakdown of lamp DL.When control IC 40 detected the dielectric breakdown of lamp DL, mode shifts was lighted pattern to the following low-voltage that will illustrate.

(low-voltage is lighted pattern)

After dielectric breakdown, control circuit 4 as shown in Fig. 3 A to 3D the switching on and off of control switch element Q1 to Q4 so that light lamp DL.

A) as shown in Fig. 3 B and 3C, control circuit 4 cut-off switch elements meanwhile, as shown in Fig. 3 A and 3D, are connected switch element to Q1 and Q4 to Q2 and Q3.As shown in Fig. 3 E, when current sense resistor R2 detects the load current I that flows among the lamp DL _DLWhen reaching predetermined current value, control circuit 4 cut-off switch element Q4.A scheduled time after control circuit 4 cut-off switch element Q4, control circuit 4 cut-off switch element Q1, thereby the path of the body diode (not shown) of the body diode (not shown) → lamp DL → inductor L1 → switch element Q3 by switch element Q2 is with load current I _DLTurn back to capacitor C5.Therefore, discharge the energy that accumulates among the inductor L1, made load current I _DLBe zero.When current sense resistor R2 detects load current I _DLWhen being zero zero crossing, control circuit 4 is connected switch element once more to Q1 and Q4, and repeats above-mentioned identical operations.This operation is that the high frequency with about tens of KHz carries out.After operation has repeated predetermined period of time, carry out following operation b).

B) as shown in Fig. 3 A to 3D, control circuit 4 cut-off switch elements are to Q1 and Q4, and connect switch element to Q2 and Q3, thus the load current I that flows among the lamp DL in reversing operation a) _DLDirection.As shown in Fig. 3 C and 3E, when current sense resistor R2 by from the voltage detecting of current conversion to load current I _DLWhen reaching predetermined current value, control circuit 4 cut-off switch element Q3.As shown in Fig. 3 B, when having pass by the scheduled time after the cut-off switch element Q3, control circuit 4 is cut-off switch element Q2 also, thus the path of the body diode (not shown) of the body diode (not shown) → inductor L1 → lamp DL → switch element Q1 by switch element Q4, with load current I _DLTurn back to capacitor C5.Therefore, load current I _DLBecome zero.When current sense resistor R2 detects load current I _DLWhen being zero zero crossing, control circuit 4 is connected switch element once more to Q2 and Q3, and repeats above-mentioned identical operations.This operation is to carry out under the high frequency of about tens of KHz.After the repetitive operation preset time cycle, the operation below carrying out once more a).

Operation a) and b) can, for example, the low frequency of 100Hz to 200Hz is conversion down alternately.By this way, in 0 to 60V low lamp voltage range, that is, reach specified when lighting voltage up to the inter-electrode voltage of lamp DL, that is, 80 to 100V (according to lamps) are carried out control to increase the load current I that flows among the lamp DL _DLThereby heating lamp DL prevents that simultaneously lamp DL from extinguishing apace.

(stablizing ignition mode)

Shown in Fig. 4 A to 4D, when lamp DL be heated and lamp DL electrode between voltage approximate reach specified when lighting voltage, control circuit 4 is changed between the open/close state of switch element Q1 to Q4.Below this operation of explanation.

A) as shown in Fig. 4 B and 4C, control circuit 4 cut-off switch elements are to Q2 and Q3, and as shown in Fig. 4 A and 4D, the connection switch element is to Q1 and Q4.As shown in Fig. 4 E, when current sense resistor R2 detects load current I _DLWhen reaching the current value of a hope, control circuit 4 cut-off switch element Q4.When current sense resistor R2 detects load current I _DLWhen being zero zero crossing, control circuit 4 is connected switch element Q4 once more, and repeats above-mentioned identical operations.Therefore, the load current I that has the chopped waveform shown in Fig. 4 E _DLFlow among the lamp DL.This operation is to carry out under the high-frequency of about tens of KHz.After the repetitive operation preset time cycle, carry out following operation B).

B) shown in Fig. 4 A to 4D, control circuit 4 cut-off switch elements are to Q1 and Q4, and connect switch element to Q2 and Q3, with the reversing operation A) in the load current I that flows among the lamp DL _DLDirection.As shown in Fig. 4 E, when current sense resistor R2 detects load current I _DLWhen reaching the current value of hope, control circuit 4 cut-off switch element Q3.When current sense resistor R2 detects load current I _DLWhen being zero zero crossing, control circuit is connected switch element Q3 once more, and repeats above-mentioned identical operations.As a result, as shown in Fig. 4 E, have and operation A) the middle load current I that obtains the chopped waveform of polarity opposite polarity _DLFlow into lamp DL.This operation is to carry out under the high frequency of about tens of KHz.After operation has repeated predetermined period of time, executable operations A once more).

Control circuit 4 with, for example, the low frequency of 100Hz to 200Hz is in operation A) and B) between alternately conversion, stable electric power is provided to lamp DL, thereby stably lights lamp DL.In the operation of low pressure ignition mode and stable ignition mode, control circuit 4 control is provided to the power of lamp DL, make lamp DL satisfy as shown in Figure 5 lamp power W1a and the relation between the modulating voltage V1a.This control makes the low pressure ignition mode can transfer to stable ignition mode, has prevented that simultaneously lamp DL from extinguishing.

Above-mentioned execution of lighting operation makes lamp DL can start and cause stable lighting.

In this embodiment, the resonance frequency f2 with resonant circuit 5 is arranged on 360KHz.But resonance frequency f2 is not limited to this value.By appropriate change induction reactance and capacitive reactance, resonant circuit 5 can be under any frequency resonance.

According to above-mentioned high pressure discharge lamp lighting apparatus,,, also can reduce inductor L2 although carry out resonance with high frequency owing to make the frequency resonance of resonant circuit 5 with three times of the inversion frequencies of switch element Q1 to Q4.Therefore, can reduce the size of high pressure discharge lamp lighting apparatus.Owing to do not need the inversion frequency of switch element Q1 to Q4 is brought up to the resonance frequency of resonant circuit 5, so can the high voltage that the dielectric breakdown of lamp DL is required remain on and habitually practise the level that lamp equates.

When light fixture has this high pressure discharge lamp lighting apparatus, during with the high-pressure discharge lamp such as metal halide lamp, high-pressure mercury vapor lamp or high-pressure sodium vapour lamp lighted by this high pressure discharge lamp lighting apparatus, can provide the compact light fixture in the crawl space in a kind of electric wire that can be installed in trace of being arranged on the ceiling and so on.

Second embodiment

Fig. 6 is the circuit diagram according to second embodiment of high pressure discharge lamp lighting apparatus of the present invention.Be the configuration of lighting circuit according to the difference of the high pressure discharge lamp lighting apparatus of present embodiment and first embodiment.More particularly, in a second embodiment, electricity consumption container C 3 and C4 have substituted the switch element Q3 and the Q4 of the lighting circuit 3 among first embodiment, and have cancelled the drive circuit 42 and the current sense resistor R2 of control circuit 4.

In lighting circuit 7 according to present embodiment, constituted a half-bridge circuit by switch element Q1 and Q2 and capacitor C3 and C4, will becoming AC electric power, and AC electric power is provided to lamp DL from the DC power conversions that rectification circuit 2 provides.Each terminals of switch element Q1 and capacitor C3 are connected to the hot side of DC power supply.Another terminals of switch element Q1 are one another in series with another terminals of switch element Q2 and are connected.Another terminals of capacitor C3 are one another in series with the terminals of capacitor C4 and are connected.Terminals of switch element Q2 and another terminals ground connection of capacitor C4.In order to regulate the load current I that flows into lamp DL _DL, its L1 of inductance and lamp DL are connected in series between the tie point and load DL between capacitor C3 and the C4.In order to eliminate the load current I that flows among the lamp DL _DLWave component, capacitor C1 and lamp DL are connected in parallel.

The configuration of resonant circuit 5 is basically the same as those in the first embodiment.Resonant circuit 5 comprises inductor L2, capacitor C2 and resistor R 1.In the present embodiment, the induction reactance of inductor L2 and the capacitive reactance of capacitor C2 so are set, so that resonance frequency f2 can be about 240KHz.

Control circuit 8 control is included in switch element Q1 in the lighting circuit and Q2 finishing the operation of hope, and comprises a control IC 40 and a drive circuit 41.Control IC 40 is that the device by microcomputer of a combine digital arithmetic processing and so on constitutes.Drive circuit 41 is to come the drive IC of control switch element Q1 to Q2 to constitute by a basis from the control signal of control IC 40 outputs.

Below with reference to the light operation of Fig. 7 A to 7C and Fig. 8 A to 8C explanation according to the high pressure discharge lamp lighting apparatus of present embodiment.In the present embodiment, as in the previous embodiments, one after the other carry out start-up mode, low pressure ignition mode and stable ignition mode, to light lamp DL.

(start-up mode)

In order to start lamp DL, high-voltage pulse must be applied between the electrode of lamp DL, to cause the dielectric breakdown between the electrode.In high pressure discharge lamp lighting apparatus, as shown in Fig. 7 C, the inductor L2 of resonant circuit 5 and the resonance frequency f2 of capacitor C2 are 240KHz.As shown in Figure 7A and 7B, switch element Q1 and Q2 alternately switch on and off with the frequency of fsw1=120KHz respectively, and this frequency is 1/2 of resonance frequency f2, and its duty factor is about 40% and 60%.As first embodiment, the number of times (50 times) that control IC 40 is provided with is carried out in operation repeatedly, with the dielectric breakdown between the electrode that causes lamp DL.As first embodiment, when the dielectric breakdown of lamp DL took place, start-up mode was transferred to the low pressure ignition mode.Although basic identical among the operation of the low pressure ignition mode among second embodiment and first embodiment,, be not carry out the conversion operations of switch element Q3 and Q4 with the difference of first embodiment.Therefore, omitted the explanation of low pressure ignition mode here.(stablizing ignition mode)

In stablizing ignition mode, as shown in Figure 8A and 8B, control circuit 8 is carried out the conversion and control of switch element Q1 and Q2.Below this operation of explanation.

A) as shown in Figure 8A and 8B, control circuit 8 cut-off switch element Q2 and connection switch element Q1.After control circuit 8 is connected switch element Q1, when by being converted into the detection electric current I of voltage _DETDetect load current I _DLWhen reaching the current value of hope, control circuit 8 cut-off switch element Q1.In addition, detect load current I _DLDecay to zero, control circuit 8 is connected switch element Q1 once more.Therefore, the load current I of the chopped waveform as shown in Fig. 8 C _DLFlow among the lamp DL.After the repetitive operation preset time cycle, carry out following operation B).

B) as shown in Figure 8A and 8B, control circuit 8 cut-off switch element Q1 and connection switch element Q2.After connecting switch element Q2, and passing through to detect electric current I _DETDetect load current I _DLReach after the current value of hope control circuit 8 cut-off switch element Q2.Detecting load current I _DLWhen decaying to zero, control circuit 8 is connected switch element Q2 once more.Therefore, as shown in Fig. 8 C, have with operation A in the load current I of chopped waveform of polarity opposite polarity _DLFlow among the lamp DL.Repeat preset time after the cycle in operation, once more executable operations A).

Control circuit 8 replaces executable operations A with the low frequency of 100Hz to 200Hz) and B), so that stable power is provided to lamp DL.This light the operation make lamp DL to light reliably.

Shown in the circuit diagram among Fig. 6, present embodiment has the series resonant circuit that the series resonant circuit that is made of inductor L2 and capacitor C2 and inductor L1 and capacitor C1 constitute.Inductor L1 has at hundreds of μ H to the induction reactance of counting in the mH scope, to prevent flowing into lamp DL at lighting of lamp electric current excessive in the process.Capacitor C1 has the capacitive reactance of hundreds of nF to number μ F scope, to eliminate the load current I that flows in the process that lights of lamp in lamp DL _DLWave component.For this reason, the resonance frequency of the series resonant circuit of inductor L1 and capacitor C1 formation is number KHz.Because resonance frequency significantly is lower than the inversion frequency fsw1 in the start-up mode of switch element Q1 and Q2, so resonance frequency is not subjected to the influence of inversion frequency.For example, when L1 is set to 700 μ H, and C1 can prevent that excessive electric current from flowing into lamp DL, also can eliminate wave component when being set to 220nF.In addition, the resonance frequency f1 of the series resonant circuit that inductor L1 and capacitor C1 constitute is 12KHz, therefore, and can be so that resonance frequency f1 be significantly smaller than the inversion frequency fsw1=120KHz in the start-up mode.For in non-loaded operation, eliminate the fluctuation of the series resonant circuit that inductor L1 and capacitor C1 constitute, preferably make the resonance frequency f1 of series resonant circuit be in the start-up mode conversion frequency f sw1 1/2 or lower.

According to above-mentioned high pressure discharge lamp lighting apparatus, can reduce resonant circuit 5, be difficult to significantly reduce size size, inductor L2 in the conventional techniques.In addition, owing to do not need to make that the inversion frequency of switch element Q1 to Q4 is very high, the required high voltage of the dielectric breakdown of lamp DL can remain on the par of habitual lamp.

The 3rd embodiment

Fig. 9 is the circuit diagram according to the 3rd embodiment of high pressure discharge lamp lighting apparatus of the present invention.The circuit arrangement of present embodiment is basically the same as those in the first embodiment basically.Difference is the voltage of the tie point between inductor L1 and the lamp DL is input to the control IC of control circuit 4, so that can detect voltage.

The operation of present embodiment is described below with reference to Figure 10 A to 10E and Figure 11.

Figure 10 A to 10D show when switch element be 40% inversion frequency fsw1 when replacing on/off to Q1 and Q4 with duty factor, output to drive signal Q1 and the Q4 of switch element Q1 and Q4 from drive circuit 41 and 42.Figure 10 B and 10C show when switch element be 60% inversion frequency fsw1 when replacing on/off to Q2 and Q3 with duty factor, output to drive signal Q2 and the Q3 of switch element Q2 and Q3 from drive circuit 41 and 42.Figure 10 E shows from the end voltage V of the secondary winding N2 output of inductor L2 _N2Even outlet terminal voltage V in the present embodiment, _N2Also be drive signal Q1, Q2, the integral multiple of the inversion frequency fsw1 of Q3 and Q4.

Figure 11 is the variable range (fsw11 to fsw12) that inversion frequency changes therein, the curve chart of the electric current that flows in variable range that the frequency that is four times in inversion frequency changes according to the change of inversion frequency fsw1 therein and the resonant circuit that draws according to the frequency that changes.

When switch element replaces on/off to Q1 and Q4 with the inversion frequency fsw1 of 40% duty factor, with when switch element replaces on/off to Q2 and Q3 with the inversion frequency fsw1 of 60% duty factor, tie point between switch element Q1 and Q2, generation has 40% duty factor and equals the square-wave voltage of the amplitude of DC supply voltage (that is the voltage of the capacitor C5 of rectification circuit 2).Square wave comprise be inversion frequency fsw1 2,3,4,6 ... frequency component doubly.Figure 11 shows the square wave with 4 times the frequency that is inversion frequency fsw1.

The lower limit fsw11 of the variable range of inversion frequency fsw1 be set to resonant circuit 5 resonance frequency f2 1/4 or bigger, and in variable range, inversion frequency fsw1 is changed to lower limit fsw11 from upper limit fsw12.In this case, the frequency that is provided to the high-voltage pulse of lamp DL from inductor L2 changes to 4 * fsw11 from 4 * fsw12.When the frequency characteristic of the impedance of inversion frequency fsw1 by resonant circuit 5 reduced, resonance current increased according to the reduction of inversion frequency fsw1.Can obtain to have the high-voltage pulse of the voltage that improves gradually according to the increase of resonance current.In the present embodiment, although inversion frequency is to change to low frequency from high frequency,, inversion frequency also can change on the contrary.

The 4th embodiment

Below with reference to Figure 12 and 13 operations that illustrate according to the 4th embodiment of high pressure discharge lamp lighting apparatus of the present invention.Figure 12 A to 12E shows when under the start-up mode of the circuit shown in Fig. 1 or 9, when switch element replaces on/off to Q2 and Q3 with the duty factor of inversion frequency fsw1 and 50% to Q1 and Q4 and switch element, the output end voltage V of the secondary winding N2 of the drive signal of switch element Q1 to Q4 and inductor L2 _N2

Figure 13 is the variable range (fsw11 to fsw12) that inversion frequency fsw1 changes therein, the curve chart of the electric current that flows in variable range that the frequency that inversion frequency is three times can be therein changes according to the variation of inversion frequency fsw1 and the resonant circuit 5 that draws according to frequency change.

When switch element replaces on/off to Q2 and Q3 with 50% duty factor to Q1 and Q4 and switch element, tie point between switch element Q1 and Q2, generation has 50% duty factor and equals the square-wave voltage of amplitude of the amplitude of DC supply voltage (that is the voltage of the capacitor C5 of rectification circuit 2).Square wave comprises the frequency component of the odd-multiple that is frequency f sw1.Present embodiment shows the square wave of the frequency with three times of inversion frequency fsw1.

As shown in Figure 13, when inversion frequency fsw1 changes to lower limit fsw11 from upper limit fsw12, thereby make inversion frequency fsw1 comprise 1/3 o'clock of resonance frequency f2 of resonant circuit 5, the current value of the resonance current that flows in the resonant circuit 5, with the frequency that is three times in inversion frequency (3 * fsw1) from frequency (3 * fsw12) convergence resonance frequency f2 increase.Along with the frequency that is three times in inversion frequency by resonance frequency f2 and near 3 * fsw11, the voltage of the resonance current that flows in the resonant circuit 5 reduces.Can obtain the high-voltage pulse that voltage reduces along with the reduction of the voltage of resonance current.Even the lower limit fsw11 at the two ends of the variable range of inversion frequency fsw1 and upper limit fsw12 can be arranged on one in the resonance frequency of resonant circuit owing to the floating or changing of the characteristic of the parts of forming resonant circuit 5 from the parasitic capacitance that high pressure discharge lamp lighting apparatus extends to the outlet line of lamp, also can obtain the value of stable high-voltage pulse.In the present embodiment, the situation that produces high-voltage pulse in the frequency that is three times in inversion frequency fsw1 more than has been described.But, can produce high-voltage pulse in the frequency of the odd-multiple (five times or higher) of inversion frequency fsw1.

Can use one can operate with the microcomputer of combine digital arithmetic processing or can operate with the analog IC of carrying out the simulation arithmetic processing such as ASIC (application-specific integrated circuit (ASIC)) as the device that changes inversion frequency fsw1.For example, as shown in Figure 14, when using microcomputer, can disperse or step ground change inversion frequency fsw1.Not only can the direction from the high frequency to the low frequency change inversion frequency fsw1, also can improve inversion frequency fsw1 again from intermediate point, and the time of control frequency change freely.On the other hand, when utilizing analog IC to change inversion frequency fsw1, not only can step ground but also can change frequency continuously, thus the control more accurately of frequency is provided.

The 5th embodiment

Below explanation is according to the 5th embodiment of high pressure discharge lamp lighting apparatus of the present invention.As shown in Figure 15, in the present embodiment, design control IC 40 is so that can be according to the detection electric current I from the secondary winding that is provided at inductor L1 _DETThe change-over time of change from start-up mode to the low pressure ignition mode.

When detection electric current I from the secondary winding of inductor L1 _DETWhen surpassing predetermined value, signal of representing lamp DL to be lighted of comparator 43 outputs.When the past preset time during cycle, the low pressure of the output of output signal by being connected to comparator 43 is lighted mode switching circuit 44 and is sent to control IC 40.When control IC 40 received signal from comparator 43 output, control IC 40 was transformed into the low pressure ignition mode with operator scheme from start-up mode.Change-over time can low pressure be lighted the resistance value of the resistance in the mode switching circuit 44 and/or the capacitance of capacitor is controlled by changing.By this way, after starting, lamp DL pass by preset time during the cycle, and can be with mode switch to the low pressure ignition mode.

Stable light the output that mode switching circuit 45 is connected to comparator 43, so that the voltage between the electrode of lamp DL has been pass by a preset time during cycle after being elevated to the specified no better than value of lighting voltage, mode shifts arrives stablizes ignition mode.Also can stable light the resistance value of the resistance in the mode switching circuit 45 and/or the capacitance of capacitor is controlled to the transfer time of stablizing ignition mode by changing.The device that detects the illuminating state of lamp DL is not limited to the detection electric current I of the secondary winding of inductor L1 _DET, but can use any device of the illuminating state that can detect lamp DL.

The 6th embodiment

Figure 16 shows a kind of improvement of the resonant circuit 5 that uses in the high pressure discharge lamp lighting apparatus according to the foregoing description shown in Figure 16.Figure 17 and 18 is respectively the structure chart and the schematic diagram of resonant circuit 5.In resonant circuit 5, inductor 12 has used transformer device structure as shown in Figure 17, and capacitor C2 is connected to the elementary winding N1 with number of turn N1, and has the intermediate point between the secondary winding N2 of number of turn N2.By using resonant circuit 5, can so that start the high-voltage pulse of lamp DL have (N1+N2)/N1 doubly the elementary winding N1 in transformer L2 and the tie point between the secondary winding N2 produce the voltage of voltage, and can produce and have more high-tension high-voltage pulse.

Consider that here the elementary winding among the transformer L2 and the turn ratio of secondary winding are 1: the situation of N (N＞1).For the high-voltage pulse that will have voltage Vo is provided to lamp DL, as the resonance potential of resonant circuit 5, be to certainly lead to voltage Vo/2 at 1: 1 o'clock in turn ratio, or when turn ratio be 1: during N (N＞1), certainly lead to voltage Vo/ (N+1).In this case owing to satisfied N＞1, so when turn ratio be 1: during N, the resonance potential that produce can be low, and reduce resonance current as resonance potential.Therefore, value of current flowing can be very little in the resonant circuit 5, and can use the midget capacitor with little capacitance.

The structure of transformer L2 has been shown among Figure 17; and comprise copper cash 113 as elementary winding; 114, one of copper cash that are used as secondary winding are twining the core 111 of copper cash 113 and copper cash 114, the bobbin 112 of supporting-core 111; boundary belt 110; make the coil interlayer band 115 of the copper wire layer mutually insulated of winding, coil band 116, core band 117; leakage surface band 118 and boundary belt 119.

The another kind that Figure 19 shows resonant circuit 5 improves.Design resonant circuit 5 is so that can be connected to the tie point between elementary winding N1 and the secondary winding N2 tie point between switch element Q1 and the Q2.Utilize this structure, for example, when the output of the secondary winding N2 that the high-voltage pulse with voltage Vo is provided to transformer L2, be enough to resonant circuit 5 is only produced 1/N times the resonance potential of the voltage Vo that is high-voltage pulse.

The resonance frequency of resonant circuit 5 is to be determined by the series resonant circuit that elementary winding N1, capacitor C2 among the transformer L2 and resistor R 1 constitute.Owing in fact on the connection line that connects transformer L2 and lamp DL, produced parasitic capacitance, so because the influence of parasitic capacitance may change resonance frequency.In addition, in resonant circuit 5, the terminals of capacitor C2 are connected to elementary winding N1 in transformer L2 and the tie point between the secondary winding N2, and resistance R 1 is connected to another terminals of capacitor C2.But, even putting upside down with resistor R 1, capacitor C2 is connected, electrical characteristics do not change yet.Therefore, capacitor C2 can put upside down with resistor R 1 and be connected.

The 7th embodiment

Below explanation is according to the 7th embodiment of high pressure discharge lamp lighting apparatus of the present invention.In the high pressure discharge lamp lighting apparatus that the circuit shown in Fig. 1 constitutes, the resonance frequency of resonant circuit 5 is arranged on 400KHz, and meanwhile the inductance of elementary winding one side of transformer L2 is arranged on 430 μ H.The elementary winding N1 of transformer L2 is made of twisted wire, and secondary winding N2 is made of single cord.Provide by EE-19.4 at transformer core, and be that characteristic when being made of single cord and elementary winding N1 are under the situation about comparing mutually of the characteristic when being made of twisted wire, obtain table 1 to the comparative result shown in 3 with elementary winding N1.

Table 1

The inductance of transformer

Table 2

The resistance value of elementary winding

Table 3

The resistance value of elementary winding and secondary winding

When applying the DC bias voltage, the resistance value of the elementary winding N1 of use single cord is less than the resistance value of using twisted wire.But in resonance frequency, the resistance value of the elementary winding N1 of use twisted wire is less than the resistance value of using single cord.The high-voltage pulse that is used to light lamp DL must have the above high voltage of 1KV, therefore the resistive component of resonance frequency must be provided with low as much as possible.The electric current that flows among the transformer L2 when in contrast, lamp DL lights has by high-frequency fluctuation being superimposed upon the waveform that forms on the square wave with the frequency below hundreds of Hz.Therefore, if the resistive component when applying bias voltage is not little, the heat that produces of transformer L2 increases so.

In the ordinary course of things, when single cord that relatively diameter is identical and twisted wire, the conductive cross-sectional area of single cord is greater than twisted wire, and the surface area of twisted wire is greater than single cord.Because resonant circuit comprises the elementary winding N1 of transformer L2, in resonant process, only need only to reduce the resistance value among the elementary winding N1.After having lighted lamp DL, only need the secondary winding N2 that electric current flows therein under low frequency, to have little resistance value.Therefore, utilize this configuration, can realize having thermogenetic inhibition in the illuminating state of the stable generation of high-tension high-voltage pulse and high-pressure discharge lamp simultaneously.

The 8th embodiment

Below with reference to eight embodiment of Figure 20 explanation according to high pressure discharge lamp lighting apparatus of the present invention.

In this and subsequently embodiment, the technology that the electronic unit of realizing constituting the high pressure discharge lamp lighting apparatus described in the embodiment of front is installed to the miniaturization on the printed circuit board (PCB) describes.The combination of the technology in the technology described in first to the 7th embodiment and this and the subsequent embodiment can realize the further miniaturization of lamp device.

Figure 20 shows the example of installation of the electronic unit of the circuit shown in pie graph 1,6 grade.Electronic unit is installed on main circuit board 10, first auxiliary circuit board 11 and second auxiliary circuit board 12 dispersedly.As shown in Figure 20, first auxiliary circuit board 11 and second auxiliary circuit board 12 are arranged vertically with predetermined interval perpendicular to main circuit board 10.In the electronic unit of the circuit shown in Fig. 1 waits, inductor L1, capacitor C1, inductor L2, inductor L3, capacitor C5 and capacitor C2 (not shown) are installed on the main circuit board 10, control IC 40, power factor correct controller 6 and bridge rectifier D B is installed on first auxiliary circuit board 11, and switch element Q1 to Q4 and drive circuit 41 and 42 are installed on second auxiliary circuit board 12.

Carry out this layout and be and consider influencing each other between the heat that electronic unit produces, wherein should avoid the semiconductor device of switch element Q1 to Q4 and so on of the influence of heat to be installed in dispersedly on first auxiliary circuit board 11 and second auxiliary circuit board 12, and the register with relatively large calorific value, choking-winding or the like will be installed on the main circuit board 10.In addition, in the time that noise must be considered, can electronic unit be installed by the layout that suitably changes electronic unit.

Lamp device can preferably be lighted a lamp DL with about power consumption of 20 to 40W, and wherein all electronic units of high pressure discharge lamp lighting apparatus are installed on the main circuit board 10 with width W=70mm and length L=77mm.

Present embodiment has a kind of structure especially, can be with as regulating height and the auxiliary circuit board 11 and 12 of the element of the ill effect parts surface that directly insert and be connected to main circuit board 10 of small size in installing in this structure.Therefore, can reduce the height of lamp device.In this mounting structure, the space that is controlled at the D=3mm that extends from the lower surface of substrate from the outstanding component leads of the following face of weld of main circuit board 10.The height H of the level of feasible distance (D=3mm) from the highest parts to the lower surface with the substrate left is less than 26mm.

By this way, must avoid the semiconductor device of thermal impact to be installed on auxiliary circuit board 11 and 12. Auxiliary circuit board 11 and 12 is arranged in the periphery of main circuit board 10, avoiding the heat radiation part of the big calorimetric of generation such as resistance and choking-winding, thereby can prevent that semiconductor device is subjected to thermal impact.

Figure 21 A to 21C is the schematic diagram that shows the coupling part between auxiliary circuit board 11 and the main circuit board 10.As shown in Figure 21 A, in main circuit board 10, formed one and on thickness direction, penetrated main circuit board 10 fully and auxiliary circuit board is inserted wherein narrow slit S.In narrow slit S, formed one and had part and a part that has greater than the first slit width A of the second slit width B of the second slit width B of the thickness of the auxiliary circuit board shown in Figure 21 11 no better than.Form two each all have the part of width B, will have the first slit width A and the part that is positioned in the middle of the narrow slit S is clipped in the middle.When auxiliary circuit board 11 is inserted narrow slit S, auxiliary circuit board 11 vertically can be fixed to main circuit board 10.On the face of weld (not being the surface of arrangement component) of main circuit board 10,, form a plurality of pad P that will weld with the pad P on the auxiliary circuit board 11 near having the part of the first slit width A.By this way, not the close part of the second slit width B that has, but form a plurality of pad P, therefore near having the first slit width A, when being inserted in the main circuit board 10, can prevent that the pad P on auxiliary circuit board 11 sides from being damaged by main circuit board 10 to auxiliary circuit board 11.

Figure 21 C shows a lip-deep pad P who is formed on auxiliary circuit board 11.But a plurality of pads are aimed on opposite surfaces.Pad P is arranged in the lower end that will be inserted in the main circuit board 10.

When auxiliary circuit board is connected to main circuit board 10, auxiliary circuit board 11 is inserted narrow slit S, make that the pad P of auxiliary circuit board 11 bottoms is outstanding to the face of weld of main circuit board 10.By this way, each part that all has second a slit width B remains on the auxiliary circuit board 11 that inserts therebetween tightly, with fixing auxiliary circuit board 11.When auxiliary circuit board 11 remained between each parts that all have the second slit width B, when main circuit board 10 was stained with the immersion welding groove, auxiliary circuit board 11 was welded on the main circuit board 10, and auxiliary circuit board 11 and main circuit board 10 are interconnected.

On main circuit board 10, form narrow slit S with the shape shown in Figure 21 A.This layout allows auxiliary circuit board 11 directly is inserted in the main circuit board 10, and main circuit board 10 and auxiliary circuit board 11 are interconnected.Because the welding between auxiliary circuit board 11 and the main circuit board 10 is formed on the face of weld of main circuit board, so this further makes it possible to prevent from scolder is inhaled up on the parts surface of main circuit board 10.Therefore, can be arranged in almost on the position near the parts surface of main circuit board 10, thereby can further reduce the size of high pressure discharge lamp lighting apparatus being installed in electronic unit on the auxiliary circuit board 11.In addition, in welding step, can directly in solder bath, flow by auxiliary circuit board 11 being fixed to the structure that main circuit board 10 obtains, and not need large-scale anchor clamps to keep auxiliary circuit board 11 perpendicular to main circuit board 10.Therefore, can obtain the advantage that to simplify manufacturing step and help to reduce cost.In addition, the welding between main circuit board 10 and the auxiliary circuit board 11 and be installed in the welding of the lead end of the electronic unit on the main circuit board 10 and can be in solder bath carry out simultaneously in the step of drift structure.Therefore, can further simplify welding step.

In the present embodiment, the part with second slit width B has the width of the thickness d of auxiliary circuit board 11 no better than.But this part can have the width less than the thickness d of auxiliary circuit board 11.Although these two each parts with second slit width B are formed among the narrow slit S,, can form the part that only has to have the second slit width B, or three or more each all has the part of the second slit width B.When forming a plurality of part, auxiliary circuit board 11 remains in a plurality of parts of main circuit board 10.Therefore, auxiliary circuit board 11 can be more stably kept, and the stress on the welding portion between auxiliary circuit board 11 and the main circuit board 10 can be disperseed.In addition, each position that all has the part of the second slit width B is not limited to the central authorities of narrow slit S, and these parts can only be formed on the both ends or one end of narrow slit S.But the part that preferably each is all had second a slit width B is formed on auxiliary circuit board is supported on the position of the mid portion on the length direction of auxiliary circuit board.When forming these parts on this position, the part of the stress support auxiliary circuit board of these opposing vibrations and so on can make confining force (stress distribution) even on the length direction of auxiliary circuit board, and can absorb the stress of vibration and so on equably.Therefore, can only go up formation scolder coupling part at the lower surface (surface) of main circuit board.

The 9th embodiment

Below with reference to nine embodiment of Figure 22 A to 24B explanation according to high pressure discharge lamp lighting apparatus of the present invention.

In the present embodiment, the pad that forms in the bottom of auxiliary circuit board 11 and be installed in the space between the electronic unit (not shown) on the auxiliary circuit board 11 and form jut.Jut is formed on the upper and lower surface of auxiliary circuit board 11.When being inserted into auxiliary circuit board 11 in the main circuit board 10, making jut contact, thereby when being inserted into auxiliary circuit board 11 in the main circuit board 10, auxiliary circuit board 11 can be fixed with predetermined altitude with the installation surface of main circuit board 10.Because jut is formed on the upper and lower surface, thereby when upper and lower lip-deep jut being contacted with main circuit board 10 when, can almost be fixed to main circuit board 10 to auxiliary circuit board 11 to auxiliary circuit board 11 insertion main circuit boards 10 perpendicular to main circuit board 10 ground.

In the structure shown in Figure 22 A, formation penetrates the hole 13 on the upper and lower surface of auxiliary circuit board 11 in the space between the bottom of auxiliary circuit board 11 pad P that forms and the electronic unit that is installed on the auxiliary circuit board.Be inserted into vertical maintenance bar 14 in the hole 13 (length that vertically keeps bar 14 to have making bar 14 not contact) and constituted jut with the parts adjacent on the main circuit board 10 with auxiliary circuit board 11.The vertical shape of bar 14 that keeps is not limited to specific shape.But, when loosely being assemblied in the hole 13, can will vertically keep bar 14 from hole 13, to take out vertical maintenance bar 14.For this reason, hole 13 preferably has identical cross sectional shape with vertical maintenance bar 14, and almost equal sectional area.In the structure shown in Figure 22 A, the cross section in hole 13 is squares, and vertically keeps bar 14 to be one having the rectangular solid long-pending with hole 13 same cross-sectional.But, insert vertical maintenance bar 14 in the square opening 13 and can be the cylinder of the diameter of the length with side that equals hole 13.When hole 13 and vertical maintenance bar 14 mutually during combination, only need on auxiliary circuit board 11, form the simple mechanism of the vertical maintenance bar 14 that hole 13 and preparation and hole 13 mates.For this reason, shown in Figure 22 B, auxiliary circuit board 11 vertically can be fixed to main circuit board 10, and not need the work of trouble.

As shown in Figure 23 A, another modification as jut forms the jut 15 that contacts with the upper surface of main circuit board 10 in the bottom of auxiliary circuit board 11.Jut 15 is to have little thickness by one to form with the member that is bonded in the upper surface of auxiliary circuit board 11.Jut 15 be arranged under two lip-deep any electronic units that are installed in auxiliary circuit board 11 and pad P on.As shown in Figure 23 B, ledge 15 can be fixed to main circuit board 10 perpendicular to main circuit board 10 ground with auxiliary circuit board 11, finishes up to soldering.Jut 15 is not limited to have the structure that the member of thickness upper surface little, that be bonded in auxiliary circuit board 11 constitutes.For example, jut 15 can use the low mode of part pick except jut 15 with the upper surface of auxiliary circuit board 11 to form.Say simply, can use with respect to other parts and form jut 15 from the outstanding mode of the upper surface of auxiliary circuit board 11.

As shown in Figure 24 A and 24B,, used the structure that electronic unit 16 is installed below the other electron component that is installed on the auxiliary circuit board 11 as another improvement of jut.By this way, can auxiliary circuit board 11 be fixed to main circuit board 10 perpendicular to main circuit board 10 ground by the electronic unit 16 that is installed on the auxiliary circuit board 11, and need not to prepare vertically to keep the additional member of auxiliary circuit board 11, thereby can further reduce cost.

As shown in Figure 25 A and 25B, as one of jut different modification, used a kind of structure, in this structure, one has almost is at least one end on U one tee section and the length direction that is attached at auxiliary circuit board 11 around the anchor clamps 17 on the upper and lower surface of auxiliary circuit board.By this way, auxiliary circuit board 11 can be fixed to main circuit board 10 perpendicular to main circuit board 10 ground, and need not main circuit board 10 is carried out any special disposal.According to this structure, only need anchor clamps 17 to keep auxiliary circuit board 11 perpendicular to main circuit board 10.When using two anchor clamps 17, can more stably keep auxiliary circuit board 11 at the two ends of auxiliary circuit board 11.In anchor clamps 17, the part of clamping auxiliary circuit board 11 preferably has the width of auxiliary circuit board no better than.By this way, can pass through anchor clamps 17 clamping auxiliary circuit board 11 reliably, and can more stably be fixed to main circuit board 10 to auxiliary circuit board 11.

The tenth embodiment

Below with reference to ten embodiment of Figure 26 A and 26B explanation according to high pressure discharge lamp lighting apparatus of the present invention.

Present embodiment relates to a kind of layout that is used as the variable resistor 18 of the stabilizer of controlling the power that offers lamp DL.Variable resistor 18 is arranged in than on almost half the position of upper surface of the more close main circuit board 10 of height of the auxiliary circuit board 11 that inserts and be fixed to main circuit board 10 with respect to the surface of main circuit board 10.

After electronic unit has been installed, when utilizing another output control lever 19 to regulate the variable resistor 18 that is installed on the auxiliary circuit board 11 to be provided to the power of lamp DL with control, owing to promoting to regulate variable resistor 18, the power F[N as shown in Figure 26 B with output control lever 19] act on the solder bond part between main circuit board 10 and the auxiliary circuit board 11.Therefore, in the present embodiment, variable resistor 18 is welded on the part of indicating with black circles, and variable resistor 18 is installed is made the center of variable resistor 18 can be positioned at apart from main circuit board 10 on the position of R=7mm, that is, and on the part below half of the height with auxiliary circuit board 11, auxiliary circuit board 11 is arranged on the upper surface (parts surface) of main circuit board 10, have, for example, the height of 21mm.By this way, can reduce torque T [the Nm]=F[N that causes by the moment that acts on the auxiliary circuit board 11] * R[m], and can reduce stress on the welding portion between auxiliary circuit board 11 and the main circuit board 10.In this formula, reference symbol " R " representative 18 distance [m] from the welding portion to the variable resistor.

The 11 embodiment

Below with reference to ten one embodiment of Figure 27 A to 27D explanation according to high pressure discharge lamp lighting apparatus of the present invention.

Figure 27 A shows the parts surface of auxiliary circuit board 11, and Figure 27 B shows the wiring diagram on the auxiliary circuit board 11, and Figure 27 C shows the parts surface of second auxiliary circuit board 12 and Figure 27 D and shows wiring diagram on the auxiliary circuit board 12.

Present embodiment relates in the shape that high pressure wiring and the small-power that is used to control is arranged on the auxiliary circuit board wiring when reducing the size of circuit.Specifically, on the printed circuit board (PCB) of small size design, a plurality of electronic units gather on printed circuit board (PCB), and therefore, circuit preferably uses the strong structure of a kind of anti-self-noise.Therefore, as shown in Figure 27 B, provide high pressure wiring W around the electronic unit that is installed on the auxiliary circuit board 11.High pressure wiring W plays protection electronic unit group and avoids the effect of the guard ring of noise effect, thereby the parts that prevented control circuit and so on are operated mistakenly.

In the 8th to the 11 embodiment, the upper and lower lip-deep pad preferred arrangements of bottom that is formed on auxiliary circuit board 11 is on the symmetric position on two surfaces of auxiliary circuit board 11.Can in the processing of soldered circuit board 10 and 11, reduce the stress biased that welding produces between main circuit board 10 and the auxiliary circuit board 11 like this.In addition, in this case, the pad that is formed on the symmetric position on upper and lower surface of bottom of auxiliary circuit board 11 preferably has identical current potential.

Industrial applicability

As mentioned above, preferably can be used to light the high-pressure discharge lamp that has little space according to high pressure discharge lamp lighting apparatus of the present invention and the light fixture that has assembled high pressure discharge lamp lighting apparatus.

The present invention is with reference to the specific embodiment explanation.But, those skilled in the art should be known in can implement many other modification, correction and use.Therefore, the present invention is not limited to specific disclosure described here, but only is subjected to the restriction of appended claims.This specification relates to Japanese patent application No.2002-312484 (application on October 28th, 2002) and 2002-318934 (application on October 31st, 2002), and the content of these patent applications is incorporated herein by reference.

Claims (30)

1. high pressure discharge lamp lighting apparatus comprises:

DC power supply;

Has first switch element that is connected to the on high-tension side terminals of DC power supply;

Second switch element with terminals of a low-pressure side that is connected to DC power supply;

Has the 3rd switch element that is connected to the on high-tension side terminals of DC power supply;

The 4th switch element with terminals of a low-pressure side that is connected to DC power supply;

Have the terminals of another terminals that are connected to first and second switch elements and be connected to first inductor of another terminals of terminals of high-pressure discharge lamp;

Be connected between the low-pressure side of the mid portion of winding of first inductor and DC power supply, and constituted first capacitor of first series resonant circuit with first inductor;

Have the terminals of terminals that are connected to first inductor and be connected to second capacitor of another terminals of another terminals of high-pressure discharge lamp;

Have the terminals of another terminals that are connected to third and fourth switch element and be connected to second inductor of another terminals of another terminals of second capacitor;

Be used to control the control circuit that switches on and off of first to fourth switch element,

Wherein before high-pressure discharge lamp is activated, control circuit is with predetermined inversion frequency, at the state that the first and the 4th switch element is connected and the second and the 3rd switch element disconnects, and alternately carry out control under first control model of conversion between the state that the first and the 4th switch element disconnects and the second and the 3rd switch element is connected

In first control model, inversion frequency makes first series resonant circuit at the high pressure of its harmonic frequency resonance with generation startup high-pressure discharge lamp,

Described inversion frequency is lower than the resonance frequency of first series resonant circuit, and is higher than the resonance frequency of second series resonant circuit that comprises second inductor and second capacitor.

2. high pressure discharge lamp lighting apparatus according to claim 1, wherein, after high-pressure discharge lamp was activated, control circuit was carried out control in second control model, in second control model, with alternately conversion between the low frequency operation below,

The state of connecting simultaneously at the first and the 4th switch element with high frequency, and between the state of at least one disconnection in the first and the 4th switch element alternately the operation of conversion and

The state of connecting simultaneously at the second and the 3rd switch element with high frequency, and the alternately operation of conversion between the state of at least one disconnection in the second and the 3rd switch element.

3. high pressure discharge lamp lighting apparatus comprises:

DC power supply;

First switch element with on high-tension side terminals of the DC power supply of being connected to;

The second switch element of terminals with low-pressure side of the DC power supply of being connected to;

Have the terminals of another terminals that are connected to first and second switch elements and be connected to first inductor of another terminals of terminals of high-pressure discharge lamp;

Be connected between the low-pressure side of the mid portion of winding of first inductor and DC power supply, and constituted first capacitor of first series resonant circuit with first inductor;

Have the terminals of terminals that are connected to first inductor and be connected to second capacitor of another terminals of another terminals of high-pressure discharge lamp;

Second inductor with terminals of another terminals that are connected to second capacitor;

Be connected the 3rd capacitor between another terminals of the high-pressure side of DC power supply and second inductor;

The low pressure that is connected DC power supply survey and another terminals of second inductor between the 4th capacitor; With

Be used to control the control circuit that switches on and off of first and second switch elements,

Wherein, before high-pressure discharge lamp was activated, control circuit was with predetermined inversion frequency, at the state that first switch element is connected and the second switch element disconnects, and alternately carry out control under first control model of conversion between the state of disconnection of first switch element and second switch element switches

In first control model, inversion frequency makes first series resonant circuit at its harmonic frequency resonance, with the high pressure of generation startup high-pressure discharge lamp,

Described inversion frequency is lower than the resonance frequency of first series resonant circuit, and is higher than the resonance frequency of second series resonant circuit that comprises second inductor and second capacitor.

4. high pressure discharge lamp lighting apparatus according to claim 3, wherein, after high-pressure discharge lamp is activated, control circuit is with first low frequency, in the operation that switches on and off of controlling first switch element with high frequency, and under second control model of alternately changing between the operation that switches on and off with high frequency control second switch element, carry out control.

5. according to claim 1 or 3 described high pressure discharge lamp lighting apparatus, wherein, in first control model, the frequency of the high pressure that first series resonant circuit produces be inversion frequency (2n+1) doubly, wherein n is a natural number.

6. according to claim 1 or 3 described high pressure discharge lamp lighting apparatus, wherein inversion frequency is higher than the twice of the resonance frequency of second series resonant circuit that comprises second inductor and second capacitor.

7. according to claim 1 or 3 described high pressure discharge lamp lighting apparatus, wherein in first control model, control circuit changes inversion frequency according to the time.

8. high pressure discharge lamp lighting apparatus according to claim 7, the variable range of inversion frequency wherein is set, makes the resonance frequency of the series resonant circuit of winning be included in integral multiple from the lower limit of variable range in the scope of the integral multiple of the upper limit of variable range.

9. high pressure discharge lamp lighting apparatus according to claim 8, wherein corresponding to the frequency of the integral multiple of inversion frequency be inversion frequency (2n+1) doubly, wherein n is a natural number.

10. high pressure discharge lamp lighting apparatus according to claim 9 is three times of inversion frequency corresponding to the frequency of the integral multiple of inversion frequency wherein.

11. high pressure discharge lamp lighting apparatus according to claim 7, wherein control circuit has digital arithmetic processing circuit and changes inversion frequency discretely by digital arithmetic processing circuit.

12. high pressure discharge lamp lighting apparatus according to claim 7, wherein control circuit has the simulation arithmetic processing circuit, and changes inversion frequency continuously by the simulation arithmetic processing circuit.

13. according to claim 1 or 3 described high pressure discharge lamp lighting apparatus, wherein first and second switch elements are the duty factor pulse width modulation controlled about 50%, and first and second switch elements alternately repeat to switch on and off operation with the time interval that equates.

14. according to claim 1 or 3 described high pressure discharge lamp lighting apparatus, wherein first inductor has a kind of transformer device structure that has elementary winding and secondary winding, terminals of elementary winding are connected to terminals of secondary winding, and first capacitor is connected the tie point between elementary winding and the secondary winding.

15. according to claim 1 or 3 described high pressure discharge lamp lighting apparatus, wherein first inductor has and a kind ofly has the transformer device structure of elementary winding and secondary winding and the turn ratio of elementary winding and secondary winding is 1: N, wherein N＞1.

16. according to claim 1 or 3 described high pressure discharge lamp lighting apparatus, wherein first inductor has a kind of transformer device structure that has elementary winding and secondary winding, elementary winding is made of twisted wire, and secondary winding is made of single cord.

17. high pressure discharge lamp lighting apparatus according to claim 1 further comprises:

Be used to detect the start-up detector of the startup of high-pressure discharge lamp,

Wherein, when start-up detector detected the startup of high-pressure discharge lamp, control circuit was existing with low frequency

A state of sequentially connecting simultaneously with high frequency at the first and the 4th switch element, the state of a disconnection in the first and the 4th switch element, and the operation of changing between the state that all disconnects of the first and the 4th switch element, with

A state of sequentially connecting simultaneously with high frequency at the second and the 3rd switch element, the state of a disconnection in the second and the 3rd switch element, and the second and the 3rd operation of changing between the state that all disconnects of switch element, between alternately under the 3rd control model of conversion, carry out control.

18. high pressure discharge lamp lighting apparatus according to claim 17 has wherein been pass by preset time during the cycle after the startup that detects high-pressure discharge lamp, carry out from the conversion operations of first control model to the 3rd control model.

19. high pressure discharge lamp lighting apparatus according to claim 17, wherein the inversion frequency of first control model is higher than the high frequency of conversion switch element in the 3rd control model.

20. according to claim 1 or 3 described high pressure discharge lamp lighting apparatus, further comprise main circuit board and auxiliary circuit board, described main circuit board and auxiliary circuit board can be installed the electronic unit that is included in the high pressure discharge lamp lighting apparatus,

Wherein be used for the pad that is welded to connect of main circuit board is formed on the upper and lower surface of the bottom of auxiliary circuit board,

On main circuit board, form the narrow slit that auxiliary circuit board inserted wherein and supports auxiliary circuit board and

Narrow slit has the part and the part with second width of the thickness that is equal to or less than auxiliary circuit board that have first width and be electrically connected to auxiliary circuit board, and first width is greater than second width.

21. high pressure discharge lamp lighting apparatus according to claim 20, wherein, pad on being formed on the bottom of auxiliary circuit board and being installed in the space between the electronic unit of auxiliary circuit board, and on the upper and lower surface of auxiliary circuit board, form the jut that can contact with the surface of main circuit board when being inserted in the main circuit board to auxiliary circuit board.

22. high pressure discharge lamp lighting apparatus according to claim 21, wherein jut comprises a bar, and described bar vertically penetrates a upper surface from auxiliary circuit board and leads to the hole of lower surface.

23. high pressure discharge lamp lighting apparatus according to claim 21, wherein jut comprises and is arranged in upper and lower lip-deep other electronic unit that is installed in auxiliary circuit board and the electronic unit between the pad.

24. high pressure discharge lamp lighting apparatus according to claim 21, wherein jut comprises the U-shaped anchor clamps of at least one end on the length direction that is fixed on auxiliary circuit board, makes the upper and lower surface of anchor clamps clamping auxiliary circuit board.

25. high pressure discharge lamp lighting apparatus according to claim 20 wherein forms pad on the upper and lower lip-deep symmetric position of auxiliary circuit board.

26. high pressure discharge lamp lighting apparatus according to claim 25, the pad of symmetric position on upper and lower surface that wherein is formed on the bottom of auxiliary circuit board has identical current potential.

27. high pressure discharge lamp lighting apparatus according to claim 20, further comprise be connected in series to high-pressure discharge lamp and be installed on the auxiliary circuit board, be used to export the variable resistor of control,

Wherein, when auxiliary circuit board was inserted main circuit board, output control variable resistor was positioned at than on the position of auxiliary circuit board with respect to the surface of the more close main circuit board of mid point of the height of the highest parts on main circuit board surface.

28. high pressure discharge lamp lighting apparatus according to claim 20, the electrical wiring figure that wherein is formed on the auxiliary circuit board comprises a part that is applied in low pressure, with a part that is applied in high pressure, and the part that is applied in high pressure is formed on the peripheral part of auxiliary circuit board.

29. high pressure discharge lamp lighting apparatus according to claim 20, wherein auxiliary circuit board is arranged near the peripheral part of main circuit board.

30. a light fixture comprises according to claim 1 or 3 described high pressure discharge lamp lighting apparatus and the high-pressure discharge lamp lighted by described high pressure discharge lamp lighting apparatus.

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