JP2006019042A - High pressure discharge lamp lighting device and lighting device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a high pressure discharge lamp lighting device which can apply proper high voltage pulses constantly to a high pressure discharge lamp. <P>SOLUTION: A lighting device 2 has a voltage raising chopper circuit 17, an inverter circuit 19 which is connected to output terminals of the chopper circuit 17, and a first starting device 4 installed in the inverter circuit 19 to which a resistor 25 for type distinction is connected. A second starting device is connected to output terminals of the lighting device 2 via cablings 5a and 5b, and a high pressure discharge lamp is connected to output terminals of the second starting device. A resistor for type distinction which is connected in series with the resistor 25 is connected to the second starting device too. And a voltage which is generated at a connection point between the two resistors for the type distinction at the time of working of the lighting device, is divided with resistors and applied to a chopping controller 18. The chopping controller distinguishes a type of the second starting device by an inputted voltage, and controls output of the lighting device by carrying out chopping control of the voltage raising chopper circuit in such a way that the proper high voltage pulses are applied to the high pressure discharge lamp from the second starting device. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a high pressure discharge lamp lighting device that controls lighting of a high pressure discharge lamp, and an illumination device using the high pressure discharge lamp lighting device.

Conventionally, in a high-pressure discharge lamp lighting device, a high-pressure discharge lamp ballast and a lighting fixture are separated from each other, a booster is disposed on the high-pressure discharge lamp ballast side, and a high-pressure discharge lamp and a high-voltage pulse generator are installed in the lighting fixture. And a high voltage obtained by superimposing the high voltage from the booster on the no-load secondary voltage from the high pressure discharge lamp ballast is output to the high voltage pulse generator, and the high voltage pulse generator further increases the input high voltage. One that superimposes a high voltage pulse and applies it to a high-pressure discharge lamp is known (for example, see Patent Document 1).
JP-A-8-045678

In such a high pressure discharge lamp lighting device, if the high voltage pulse generator is not connected to the lighting fixture side, the high voltage generated from the booster on the high pressure discharge lamp stabilizer side is high. There is a problem that an unnecessarily high high-voltage pulse is generated from the pulse generator and applied to the high-pressure discharge lamp, which may cause damage to the high-pressure discharge lamp.
The present invention relates to a high pressure discharge lamp for generating a high pressure pulse from a second starting device having a pulse voltage generating means provided separately from a lighting device incorporating the first starting device. In contrast, the present invention provides a high pressure discharge lamp lighting device and a lighting device capable of always applying an appropriate high voltage pulse.

  The invention described in claim 1 is connected between a high pressure discharge lamp, a lighting device incorporating a first starting device for generating a high voltage pulse for starting the high pressure discharge lamp, and the high pressure discharge lamp and the lighting device. A second starting device having a pulse voltage generating means for generating a high voltage pulse for starting the high pressure discharge lamp in accordance with the output of the lighting device, and the second starting device incorporated in the second starting device to discriminate its own type And the lighting device is a high pressure discharge lamp lighting device that controls the output based on the determination result of the determination circuit.

  The high pressure discharge lamp is a mercury lamp, a metal halide lamp, a high pressure sodium lamp or the like. The discrimination circuit can be configured to notify the type of the starting device by an electric signal or an optical signal. A specific configuration can be appropriately implemented by those skilled in the art with reference to the embodiments described later. The lighting device can change the output. For example, an inverter, a chopper, or a combination of these can be obtained relatively easily and inexpensively.

  According to a second aspect of the present invention, in the high pressure discharge lamp lighting device according to the first aspect, the lighting device determines the connection of the second starting device by the determination circuit and stops the operation of the first starting device. is there.

  According to a third aspect of the present invention, in the high pressure discharge lamp lighting device according to the first aspect, the second starting device is a pulse voltage reducing means such as a capacitor, a Zener diode, or a varistor that reduces a high voltage pulse from the lighting device. It is in having established.

  According to a fourth aspect of the present invention, in the high pressure discharge lamp lighting device according to any one of the first to third aspects, the lighting device controls the output based on the determination result of the determination circuit, whereby pulse voltage generating means is provided. Is to control the peak value of the high voltage pulse.

  A fifth aspect of the present invention is an illuminating apparatus comprising a lighting fixture that supports a high-pressure discharge lamp and a high-pressure discharge lamp lighting device according to the first aspect that controls lighting of the high-pressure discharge lamp of the lighting fixture.

According to invention of Claims 1 thru | or 4, a high voltage | pressure pulse is sent with respect to a high pressure discharge lamp from the 2nd starter which has a pulse voltage generation means provided separately from the lighting device incorporating the 1st starter. What is generated can provide a high pressure discharge lamp lighting device capable of always applying an appropriate high voltage pulse to the high pressure discharge lamp.
In addition, according to the second and third aspects of the present invention, it is possible to provide a high pressure discharge lamp lighting device capable of removing the adverse effect on the second starting device due to the high voltage pulse from the first starting device of the lighting device.
Further, according to the invention described in claim 4, it is possible to provide a high pressure discharge lamp lighting device capable of adjusting the peak value of the high voltage pulse applied to the high pressure discharge lamp.
Further, according to the invention described in claim 5, it is possible to provide an illuminating device capable of always applying an appropriate high voltage pulse to the high pressure discharge lamp.

Embodiments of the present invention will be described with reference to the drawings.
(First embodiment)
As shown in FIG. 1, a lighting device 2 is connected to a commercial AC power source 1. The lighting device 2 includes a first starter 4 that generates a high voltage pulse for starting the high-pressure discharge lamp 3.

  One end of a relatively long distance wiring 5a, 5b is connected to the output terminals 2a, 2b of the lighting device 2. The other ends of the wires 5a and 5b are connected to the input terminals 6a and 6b of the second starter 6. The output terminals 6c and 6d of the second starter 6 are connected to the high-pressure discharge lamp 3 by short distance wires 7a and 7b.

  Specifically, the configuration of the lighting device 2 is connected to the commercial AC power supply 1 with an input terminal of a full-wave rectifier circuit 11 formed of a diode bridge, as shown in FIG. A MOS-type first FET (field effect transistor) 13 is connected in parallel to a terminal via a first inductor 12 in series. A series circuit of a pair of smoothing capacitors 15 and 16 made of electrolytic capacitors is connected in parallel to the first FET 13 via a diode 14 in the forward direction.

  The first inductor 12, the first FET 13, the diode 14, and the smoothing capacitors 15 and 16 constitute a boost chopper circuit 17. The step-up chopper circuit 17 includes a chopping control unit 18, and the chopping control unit 18 controls the FET 13 on and off.

  An inverter circuit 19 is connected between the output terminal of the boost chopper circuit 17, that is, between both ends of the series circuit of the smoothing capacitors 15 and 16. In the inverter circuit 19, a series circuit of MOS type second and third FETs 20 and 21 is connected in parallel to the series circuit of the smoothing capacitors 15 and 16, and the connection point of the smoothing capacitors 15 and 16 is connected to the output terminal 2a. , A capacitor 22 and a second inductor 23 are connected in series at the connection point of the second and third FETs 20 and 21, and the secondary winding of the igniter transformer 24 constituting the first starting device 4 is connected. To the output terminal 2b.

A type discrimination resistor 25 is connected in parallel to the smoothing capacitor 15, and a series circuit of resistors 26 and 27 is connected in parallel to the smoothing capacitor 16.
The first starting device 4 connects a series circuit of a diode 28, a resistor 29 and a capacitor 30 in parallel to the third FET 21 through the capacitor 22 and the second inductor 23 in series. In addition, a series circuit of a primary winding of the igniter transformer 24 and a bidirectional two-terminal thyristor 31 is constituted by a pulse voltage generation circuit connected in parallel. A MOS type fourth FET 32 is connected to the capacitor 30 in parallel. In the inverter circuit 19, the FETs 20 and 21 are alternately turned on and off at a desired low frequency by the switching control unit 33.

  The second starting device 6 operates by receiving low-frequency power from the lighting device 2, and, as shown in FIG. 3, a type determining resistor 35 and a pulse voltage between the input terminals 6a and 6b. An absorption capacitor 36 is connected. The resistor 35 is set to a resistance value determined according to the type of the second starting device 6. The type includes the performance of the second starter 6 and the type of the high-pressure discharge lamp 3 connected with the second starter 6 (including the type of lamp and rated power).

  A series circuit of the resistor 25 of the lighting device 2 and the resistor 35 constitutes a discrimination circuit that discriminates the type of the second starting device 6. The capacitor 36 constitutes a pulse voltage reducing means for absorbing and reducing a high voltage pulse.

  Pulse voltage generating means 37 is connected to the capacitor 36. The pulse voltage generating means 37 has a capacitor 38 connected in parallel to the capacitor 36 through a resistor 38 and a diode 39 in series, and a primary winding of an igniter transformer 41 and a diode 42 are connected to the capacitor 40 in series. Unidirectional three-terminal thyristors 43 are connected in parallel. A series circuit of a resistor 44 and a capacitor 45 is connected to the capacitor 36 in parallel. A bidirectional two-terminal thyristor 46 is connected between the gate of the three-terminal thyristor 43 and a connection point between the resistor 44 and the capacitor 45.

  In such a configuration, in the lighting device 2, the power supply voltage is boosted by the on / off operation of the first FET 14, the boosted DC voltage is charged in the smoothing capacitors 15, 16, and this DC voltage is supplied to the inverter circuit 19. To be supplied. In the inverter circuit 19, the second and third FETs 20 and 21 are alternately controlled on and off in a low frequency cycle. Thereby, low frequency electric power is output between the output terminals 2a and 2b of the inverter circuit 19, and is supplied to the 2nd starting device 6 via wiring 5a and 5b.

  On the other hand, since the second starting device 6 is connected to the lighting device 2 via the wires 5a and 5b, the type determining resistor 25 of the lighting device 2 and the type determining resistor of the second starting device 6 are used. 35 is connected in series between the output terminals 2a and 2b of the lighting device 2 via the wires 5a and 5b. Thus, when low frequency power is supplied from the lighting device 2 to the second starting device 6, a predetermined voltage is generated at the output terminal 2a, and this voltage is divided by the resistors 26 and 27 to be chopping control unit. 18 is supplied. This divided voltage indicates what kind of second starting device 6 is, for example, what kind of high voltage pulse is generated with respect to the input voltage.

  Therefore, the chopping control unit 18 inputs the divided voltage, thereby controlling the switching duty of the first FET 13 and controlling the DC voltage supplied to the inverter circuit 19. The voltage charged in the capacitor 30 in the pulse voltage generation circuit is proportional to the DC voltage. Further, since the pulse voltage is proportional to the charging voltage of the capacitor 30, it can be controlled so that an appropriate high-pressure pulse is generated from the second starting device 6 to the high-pressure discharge lamp 3. In this way, the low-frequency output voltage supplied from the lighting device 2 to the second starter 6 is controlled so that an appropriate high voltage pulse is generated from the second starter 6 to the high-pressure discharge lamp 3.

  Further, the voltage divided by the resistors 26 and 27 is supplied to the fourth FET 32, and the FET 32 is turned on. Thereby, since the capacitor 30 is short-circuited, the operation of the first starter 4 is stopped. As described above, when the lighting device 2 determines that the second starter 6 is connected to the high pressure discharge lamp 3, the operation of the first starter 4 can be stopped. Thereby, it is possible to prevent an unnecessary high voltage pulse from being supplied from the lighting device 2 to the second starting device 6, and it is possible to eliminate the adverse effect on the second starting device 6 caused by the high voltage pulse.

  Also, if the fourth FET 32 fails and the capacitor 30 is not short-circuited, the capacitor 30 is charged via the diode 28 and the resistor 29. At this time, when the charging voltage of the capacitor 30 reaches the breakover voltage of the bidirectional two-terminal thyristor 31, the two-terminal thyristor 31 becomes conductive, so that the charging charge of the capacitor 30 flows to the primary winding of the igniter transformer 24, A high voltage pulse is generated in the secondary winding and supplied to the second starter 6. However, even if such a situation occurs, since the capacitor 36 that absorbs the pulse voltage is connected to the second starting device 6, the capacitor 36 absorbs the high voltage pulse from the lighting device 2 and the device. To prevent adverse effects.

  When low frequency power is supplied from the lighting device 2 to the second starter 6, the capacitor 40 is charged via the resistor 38 and the diode 39 when the input terminal 6 a is positive in the second starter 6. Further, the capacitor 45 is charged via the resistor 44. When the charging voltage of the capacitor 45 reaches the breakover voltage of the bidirectional two-terminal thyristor 46, the two-terminal thyristor 46 becomes conductive.

  When the bidirectional two-terminal thyristor 46 is turned on, the three-terminal thyristor 43 is turned on, the discharge current from the capacitor 40 flows instantaneously in the primary winding of the igniter transformer 41, and several kV is supplied to the secondary winding of the igniter transformer 41. A high pulse voltage is generated and applied to the high-pressure discharge lamp 3. At this time, the high voltage pulse applied to the high pressure discharge lamp 3 is adjusted to an appropriate peak value by controlling the low frequency voltage from the lighting device 2. Therefore, an unnecessarily high high voltage pulse is not applied to the high pressure discharge lamp 3.

  When the high pressure discharge lamp 3 starts to light, the lamp voltage decreases, and thereafter, the charging voltage of the capacitor 45 does not reach the breakover voltage of the bidirectional two-terminal thyristor 46, and the pulse from the second starting device 6 The voltage output is stopped. Thus, after the high pressure discharge lamp 3 is lit, the generation of the high voltage pulse can be stopped reliably. And after lighting, it comes to maintain lighting by the low frequency electric power from the lighting device 2.

  When the high pressure discharge lamp 3 is directly connected to the lighting device 2 with a short wiring, the first starting device 4 in the lighting device 2 operates, and a high voltage pulse is generated from the first starting device 4 by a high pressure. Applied to the discharge lamp 3. And the high pressure discharge lamp 3 comes to light.

(Second Embodiment)
This embodiment shows a modification of the second starting device 5. Note that the same reference numerals are given to the same portions as those of the above-described embodiment, and detailed description thereof is omitted. The configuration of the lighting device 2 is the same as that of the first embodiment, and the overall configuration is the same as that of FIG.

As shown in FIG. 4, the second starting device 6 has a type determining resistor 47 connected in parallel to a capacitor 40 in place of the type determining resistor 35 in the first embodiment. . Other configurations are the same as those of the first embodiment.
In this embodiment, a discrimination circuit is constituted by the type discrimination resistor 25, the resistor 38 and the diode 39, and the type discrimination resistor 47 of the lighting device 2. That is, the series circuit of the resistor 25, the resistor 38, the diode 39, and the resistor 47 is connected between the output terminals 2a and 2b of the lighting device 2 via the wirings 5a and 5b.

  Thus, when low frequency power is supplied from the lighting device 2 to the second starting device 6, a predetermined voltage is generated at the output terminal 2a, and this voltage is divided by the resistors 26 and 27 to be chopping control unit. 18 is supplied. Then, the chopping control unit 18 inputs the divided voltage to control the switching frequency of the first FET 13, and an appropriate high voltage pulse is generated from the second starter 6 to the high pressure discharge lamp 3. Thus, the lighting device 2 is controlled.

Therefore, also in this embodiment, the low-frequency output voltage supplied from the lighting device 2 to the second starting device 6 generates an appropriate high voltage pulse from the second starting device 6 to the high-pressure discharge lamp 3. Thus, a high voltage pulse controlled appropriately and controlled to an appropriate peak value is applied to the high pressure discharge lamp 3. In addition, about the other, there exists an effect similar to embodiment mentioned above.
Needless to say, the configuration of the determination circuit is not limited to the first and second embodiments described above.

(Third embodiment)
This embodiment shows a modification of the lighting device 2. Note that the same reference numerals are given to the same portions as those of the above-described embodiment, and detailed description thereof is omitted. The second starting device 5 has the configuration shown in FIG. 3 used in the first embodiment or FIG. 4 used in the second embodiment. The overall configuration is the same as in FIG.

  As shown in FIG. 5, the lighting device 2 uses a lamp power control circuit 48 instead of the switching control unit 33. The lamp power control circuit 48 inputs the voltage divided from the connection point of the resistors 26 and 27 to determine the type of the second starter 6 connected, and accordingly, each FET 20 of the inverter circuit 19 is connected. , 21 is controlled to change the lamp power. That is, the second starter 6 is provided corresponding to the high pressure discharge lamp 3 and what kind of lamp power the high pressure discharge lamp 3 is connected to by determining the type of the second starter 6. Since it can be known, appropriate lamp power control according to the high pressure discharge lamp 3 can be performed. In addition, about the other, there exists an effect similar to embodiment mentioned above.

  In each of the above-described embodiments, the connection of the second starter 6 is discriminated to stop the operation of the first starter 4 in the lighting device 2, and the second starter 6 has the first starter 6 stopped. Although the capacitor 36 that absorbs the high voltage pulse from the starter 4 has been described, the capacitor 36 that absorbs the high voltage pulse may be omitted if there is a function for stopping the operation of the first starter 4. . Further, when the lighting device 2 does not have a function of stopping the operation of the first starter 4, it is necessary to provide the second starter 5 with a capacitor 36 that absorbs a high voltage pulse.

  In each of the above-described embodiments, the second starting device 5 has been described using a capacitor as a pulse voltage reducing means for reducing a high voltage pulse. However, the present invention is not limited to this. A combination, a varistor, a Zener diode, or a discharge gap element may be used. Those using capacitors have a function of absorbing and reducing high voltage pulses, and those using varistors, Zener diodes, and discharge gap elements have a function of suppressing and reducing high voltage pulses.

(Fourth embodiment)
This embodiment describes an illumination device.
As shown in FIG. 6, the high-pressure discharge lamp 3 is supported by a lighting fixture 51, and the lighting fixture 51 is fixed to, for example, an indoor ceiling 52. And the 2nd starting device 6 is arrange | positioned in the vicinity of this lighting fixture 51, and is connected to the lamp socket 53 by wiring 7a, 7b. The second starting device 6 may be integrated into the lamp socket 53.

The lighting device 2 is installed at a specific place in the room, and is connected to the second starting device 6 through long wires 5a and 5b.
In the illuminating device having such a configuration, a low-frequency output voltage supplied from the lighting device 2 to the second starting device 6 generates an appropriate high voltage pulse from the second starting device 6 to the high-pressure discharge lamp 3. To be properly controlled. Therefore, a high voltage pulse controlled to an appropriate peak value is applied to the high-pressure discharge lamp 3, and the high-pressure discharge lamp 3 can be reliably started and lit without giving an excessive burden.

The block diagram which shows the whole structure which concerns on 1st Embodiment of this invention. The figure which shows the specific circuit structure of the lighting device in the embodiment. The figure which shows the specific circuit structure of the 2nd starting device in the embodiment. The figure which shows the specific circuit structure of the 2nd starting device which concerns on 2nd Embodiment of this invention. The figure which shows the specific circuit structure of the lighting device which concerns on the 3rd Embodiment of this invention. The figure which shows the structure of the illuminating device which concerns on 4th Embodiment of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 2 ... Lighting device, 3 ... High pressure discharge lamp, 4 ... 1st starter, 6 ... 2nd starter, 18 ... Chopping control part, 25, 35 ... Resistance for type discrimination | determination.

Claims (5)

A high pressure discharge lamp,
A lighting device incorporating a first starter for generating a high voltage pulse for starting the high pressure discharge lamp;
A second starting device connected between the high pressure discharge lamp and the lighting device, and having a pulse voltage generating means for generating a high voltage pulse for starting the high pressure discharge lamp according to the output of the lighting device;
A discriminating circuit incorporated in the second starting device for discriminating the type of the self;
The lighting device controls an output based on a discrimination result of the discrimination circuit.   2. The high pressure discharge lamp lighting device according to claim 1, wherein the lighting device discriminates the connection of the second starting device by the discrimination circuit and stops the operation of the first starting device.   2. The high pressure discharge lamp lighting device according to claim 1, wherein the second starting device is provided with a pulse voltage reducing means for reducing a high voltage pulse from the first starting device built in the lighting device.   4. The lighting device according to claim 1, wherein the lighting device controls an output based on a discrimination result of the discrimination circuit, whereby the pulse voltage generation unit controls a peak value of a high voltage pulse. 5. The high pressure discharge lamp lighting device according to one.   An illumination device comprising: a lighting fixture that supports a high-pressure discharge lamp; and the high-pressure discharge lamp lighting device according to claim 1 that controls lighting of the high-pressure discharge lamp of the lighting fixture.

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