JP2007234540A - High-pressure discharge lamp lighting device, and lighting system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To control lighting of a high-pressure discharge lamp in accordance with a determined rated voltage by determining the rated voltage of the high-pressure discharge lamp when starting it. <P>SOLUTION: This high-pressure discharge lamp lighting device is equipped with a lamp voltage detecting circuit 4 to detect the lamp voltage of the high-pressure discharge lamp 13 when starting it, a first timer 11 which is operated to time along with the commencement of starting, a lamp determining means 6 to determine the rated power of the connected high-pressure discharge lamp by detecting a shift from glow discharge to arc discharge of the high-pressure discharge lamp 3 by the lamp voltage which the lamp voltage detecting circuit detects when starting it, and by comparing the timed value of the first timer 11 with a set value at that time, and an electronic stabilizer 2 to control lighting of the high-pressure discharge lamp based on the rated power which the lamp determining means 6 has determined. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

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

Conventionally, as a high-pressure discharge lamp lighting device, the detection means for detecting that the electrical characteristics, optical characteristics, or temperature characteristics of the high-pressure discharge lamp after the DC power supply is exceeded exceeds a predetermined threshold, and the time until the threshold is exceeded is integrated. There is known one provided with timer means and discrimination means for discriminating the type of the high-pressure discharge lamp based on the length of the accumulated time of the timer means (for example, see Patent Document 1).
JP 2003-229289 A

  However, in order to determine the type of high-pressure discharge lamp, that is, the rated power, by integrating the time until the electrical characteristics, optical characteristics, or temperature characteristics of the high-pressure discharge lamp exceed a predetermined threshold with the timer means, In particular, in the case of a high-pressure discharge lamp with a large rated power, there is a problem that it takes a long time for the electrical characteristics, optical characteristics, or temperature characteristics to exceed a predetermined threshold value.

  An object of the present invention is to provide a high-pressure discharge lamp lighting device and an illumination device that can determine the rated power of a high-pressure discharge lamp at the time of starting and can control lighting of the high-pressure discharge lamp according to this determination.

  The invention corresponding to claim 1 is a lamp voltage detecting means for detecting the lamp voltage of the high-pressure discharge lamp at the time of starting, a timer that operates at the time of starting, and a lamp voltage detected by the lamp voltage detecting means at the time of starting. A lamp discriminating means for discriminating the rated power of the connected high-pressure discharge lamp by detecting a transition from glow discharge to arc discharge of the lamp and comparing the time value of the timer at this time with a set value; The high-pressure discharge lamp lighting device includes a lighting circuit that controls lighting of the high-pressure discharge lamp based on the rated power determined.

  The term “starting” refers to a period of transition from glow discharge to arc discharge. For example, the time from the start of a high-pressure discharge lamp with a rated power of 35 W until the transition from glow discharge to arc discharge is on the order of 50 ms, and the rated power is If the time from the start of the 70 W high pressure discharge lamp to the transition from glow discharge to arc discharge is around 250 ms, the lamp discriminating means shifts to arc discharge after starting by setting the set value to about 100 ms. By measuring the time until the rated power of the connected high-pressure discharge lamp can be determined. When the rated power of the connected high-pressure discharge lamp is determined, the lighting circuit controls lighting of the high-pressure discharge lamp with an output current corresponding to the rated power.

  The invention corresponding to claim 2 is the high pressure discharge lamp lighting device according to claim 1, wherein the lamp discriminating means discriminates the rated power of the high pressure discharge lamp at the first start after the replacement of the high pressure discharge lamp. The result is stored in a memory for starting and lighting control, and thereafter lighting control is performed without determining the rated power until the high-pressure discharge lamp is replaced.

  In this way, at the first start when the high pressure discharge lamp is replaced, the rated power of the high pressure discharge lamp is determined and stored in the memory, and thereafter, the rated power of the memory is used without determining the rated power. Then, the high pressure discharge lamp may be started. As a result, starting control can be performed in accordance with the rated power of the connected high pressure discharge lamp after the replacement, and the life of the high pressure discharge lamp can be extended.

  According to a third aspect of the invention, in the high pressure discharge lamp lighting device according to the first aspect, the second timer for measuring the extinguishing time of the high pressure discharge lamp, and the set value is corrected by the time measured by the second timer Correction means is provided.

  As a result, even if the time until the transition to arc discharge after the start slightly changes depending on the temperature at the start of the start of the high-pressure discharge lamp, the set value according to the time is changed, so that the rated power can always be determined appropriately. .

The invention corresponding to claim 4 is an illuminating apparatus comprising the high pressure discharge lamp lighting device according to any one of claims 1 to 3 and a lighting fixture body having the high pressure discharge lamp.
Even if high-pressure discharge lamps with different rated power are loaded in the lighting fixture, this lighting device determines the rated power of the high-pressure discharge lamp and performs lighting by controlling lighting of the high-pressure discharge lamp according to the rated power.

According to the present invention, the rated power of the high-pressure discharge lamp can be determined in a short time after starting compared to the prior art, and lighting control of the high-pressure discharge lamp can be performed according to this determination.
In addition, according to the present invention, after the replacement of the high-pressure discharge lamp, starting control can be performed in accordance with the rated power of the connected high-pressure discharge lamp, and the life of the high-pressure discharge lamp can be extended.
Further, according to the present invention, the rated power can always be properly determined even if the time from the start to the arc discharge changes somewhat depending on the temperature at the start of the start of the high pressure discharge lamp.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(First embodiment)
In this embodiment, for example, a case where the rated power of the high-pressure discharge lamp is determined to be 35 W or 70 W and started to control lighting will be described.

  An electronic ballast 2 constituting a lighting circuit is connected to the commercial AC power source 1. The electronic ballast 2 includes, for example, a full-wave rectifier circuit that full-wave rectifies alternating current, a boost chopper circuit that boosts the output of the full-wave rectifier circuit, a DC power supply circuit that includes a smoothing capacitor that smoothes the output of the boost chopper circuit, The inverter circuit is configured to receive a DC power supply from the DC power supply circuit and output an AC rectangular wave voltage, and a starting circuit 2a that generates a high-pressure pulse to start the high-pressure discharge lamp.

  A high pressure discharge lamp 3 is connected to the output end of the electronic ballast 2. The high pressure discharge lamp 3 is, for example, in the shape of a light bulb having a base, and the output end of the electronic ballast 2 is a socket into which the base of the high pressure discharge lamp 3 is screwed.

  A lamp voltage VL generated between both ends of the high-pressure discharge lamp 3 is detected by a lamp voltage detection circuit 4 as lamp voltage detection means, and a lamp current flowing through the high-pressure discharge lamp 3 is detected by a lamp current detection circuit 5. .

  The lamp voltage detected by the lamp voltage detection circuit 4 is supplied to a lamp determination circuit 6 as lamp determination means, and the lamp current detected by the lamp current detection circuit 5 is supplied to a power control circuit 7. The power control circuit 7 controls the electronic ballast 2 and drives the starting circuit 2a at the time of starting. When the high-pressure discharge lamp 3 is turned on, the lamp current is controlled to be constant according to the rated power based on the lamp current detected by the lamp current detection circuit 5.

  The lamp discriminating circuit 6 includes first and second timers 11 and 12, and starts the time counting operation of the first timer 11 at the timing when the power control circuit 7 starts the operation of the starting circuit 2a. When the lamp voltage from the lamp voltage detection circuit 4 changes to a voltage shifted from glow discharge to arc discharge, the time counting operation of the first timer 11 is stopped. Then, the measured time of the first timer 11 is compared with a preset value, and when the measured time is equal to or less than the set value, the rated power of 35 W is determined. Further, when the timekeeping time is larger than the set value, the rated power of 70 W is determined.

  When a high-pressure discharge lamp with a rated power of 35 W was started, the time from the start to the transition to glow discharge through arc discharge was approximately 52 msec, whereas the high-pressure discharge lamp with a rated power of 70 W was started. The time from the start to the transition to the arc discharge through the glow discharge was about 245 msec. From these relationships, the reference set value is set to 100 msec, for example.

  When an operation switch (not shown) is turned off, the power control circuit 7 stops the operation of the electronic ballast 2 and turns off the high pressure discharge lamp 3. At this time, the lamp discriminating circuit 6 starts the time counting operation of the second timer 12 by a signal from the power control circuit 7. When the operation switch is turned on again, the timing operation of the second timer 12 is stopped. Then, based on the time measured by the second timer 12, the set value for determining the rated power is corrected. That is, when the start is started when the temperature of the high pressure discharge lamp 3 is high, the glow discharge time is shortened. Therefore, when the time measured by the second timer 62 is short, the set value is corrected to be smaller than the reference set value. .

  When the high-pressure discharge lamp 3 is started, it becomes glow discharge and eventually shifts from glow discharge to arc discharge and maintains the lighting state. The lamp voltage and lamp current at this time change as shown in FIG.

  In order to determine the rated power of the high-pressure discharge lamp 3 from the change in the lamp voltage at the time of the arc discharge transition and the time from the start of the start until the lamp voltage changes, the lamp discrimination circuit 6 and the power control circuit 7 are The control is performed based on the flowchart shown in FIG.

  When an operation switch (not shown) for turning on the power is turned on, first, the lamp discriminating circuit 6 stops the timing operation of the second timer 12 in step S1, and in step S2, correction processing of the set value is performed. I do. That is, when the time measured by the second timer 12 is short and the high pressure discharge lamp 3 is restarted in a state where it has not yet cooled down, the set value is corrected to be shorter than the reference set value according to the time measured. To do. If the time is longer than a certain time, the reference set value is used without correction.

  Subsequently, the power control circuit 7 turns on the starting circuit 2a in step S3. Thereby, starting of the high pressure discharge lamp 3 is started. The lamp discriminating circuit 6 starts the time counting operation of the first timer 11 in step S4, monitors the lamp voltage from the lamp voltage detecting circuit 4 in step S5, and the high-pressure discharge lamp 3 arcs from the glow discharge. It is determined whether or not the process has shifted to discharging. When the transition to arc discharge is determined, the timing operation of the first timer 11 is stopped in step S6.

  In step S7, the lamp determination circuit 6 compares the time measured by the first timer 11 with a set value to determine whether the rated power of the high pressure discharge lamp 3 is 35 W or 70 W. When the rated power 35W is determined, the power control circuit 7 controls the electronic ballast 2 to maintain the lighting state of the high pressure discharge lamp 3 with the lamp power of the rated power 35W in step S8. When the rated power of 70 W is determined, the power control circuit 7 controls the electronic ballast 2 so as to maintain the lighting state of the high pressure discharge lamp 3 with the lamp power of the rated power of 70 W in step S9.

  Thereafter, in step S10, when the operation switch is turned off and the power supply is stopped, the power control circuit 7 controls the high pressure discharge lamp 3 to be turned off. The lamp discriminating circuit 6 starts the time counting operation of the second timer 12 in step S11. Note that the second timer 12 is backed up and performs a time measuring operation while the high pressure discharge lamp 3 is turned off.

  As described above, whether the rated power of the high-pressure discharge lamp 3 connected to the electronic ballast 2 is 35 W or 70 W, the time from the start of start to the transition of the discharge state from glow discharge to arc discharge is the first timer. 11 is measured by comparing the measured time with a set value.

  Therefore, the rated power is judged at the time of arc discharge transition, and the rated power of the high-pressure discharge lamp is shorter in time than the judgment that is made after the high-pressure discharge lamp waits until it becomes more stable from arc discharge. Can be determined. And according to this discrimination | determination, the high pressure discharge lamp 3 connected can be appropriately lightly maintained by rated power.

  In addition, a second timer 12 for measuring the time during which the high pressure discharge lamp 3 is extinguished is provided, and a set value used for determining the rated power when the high pressure discharge lamp 3 is restarted in a state where it has not cooled down sufficiently. Is corrected so as to be shorter than the reference set value, the rated power of the high-voltage discharge lamp 3 is not affected by the temperature at the start of the high-pressure discharge lamp 3 Discrimination can always be made appropriate.

(Second Embodiment)
This embodiment will also be described for determining whether the rated power of the high-pressure discharge lamp is 35 W or 70 W and starting and controlling the lighting. In addition, the same code | symbol is attached | subjected to the part same as embodiment mentioned above, and detailed description is abbreviate | omitted.

  In this embodiment, as shown in FIG. 4, instead of the lamp discriminating circuit 6, a lamp discriminating circuit 61 having a memory 13 is used instead of making the second timer 12 unnecessary. The lamp discriminating circuit 61 discriminates the rated power of the high-pressure discharge lamp 3 at the first start after the replacement of the high-pressure discharge lamp 3 and discriminates whether the rated power is 35 W or 70 W. I remember it.

  In this case, the replacement of the high-pressure discharge lamp 3 is determined by, for example, detecting the removal of the cover covering the high-pressure discharge lamp 3 or determining the replacement by operating the reset switch during the replacement. There are various methods, and there is no particular limitation.

  The lamp discriminating circuit 61 stops discriminating the rated power at the second and subsequent startups after storing the rated power discriminating result in the memory 13, and uses the rated power information stored in the memory 13 as the power control circuit. 7 is supplied. This operation is continued until the next time the high pressure discharge lamp 3 is replaced.

  In such a configuration, when the high-pressure discharge lamp 3 is replaced and the electronic ballast 2 is first started for the high-pressure discharge lamp 3, the lamp determination circuit 61 determines the rated power of the high-pressure discharge lamp 3. The determination at this time is the same as in the first embodiment described above, and the first timer 11 measures the time from the start of start until the discharge shifts from glow discharge to arc discharge.

  When the lamp discriminating circuit 61 monitors the lamp voltage from the lamp voltage detecting circuit 4 and determines that the high-pressure discharge lamp 3 has shifted from glow discharge to arc discharge, the time measured by the first timer 11 is compared with the set value. Then, it is determined whether the rated power of the high pressure discharge lamp 3 is 35 W or 70 W.

  When the lamp discriminating circuit 61 discriminates the rated power of the high-pressure discharge lamp 3, the discrimination result is stored in the memory 13. From the next start-up, the rated power stored in the memory 13 of the lamp discriminating circuit 61 is supplied to the power control circuit 7, and the power control circuit 7 controls the electronic ballast 2 accordingly, and the electronic ballast 2 Starts the high pressure discharge lamp 3 and controls the lighting thereof.

  In this way, when the rated power is determined during replacement of the discharge lamp, starting control that matches the rated power of the connected high-pressure discharge lamp can be performed by using the determined rated power thereafter. The life of the discharge lamp can be extended.

  In each of the above-described embodiments, the case where the rated power of the high-pressure discharge lamp 3 is two types of 35 W and 70 W has been described. Furthermore, by providing two types of setting values, the rated power 150 W is added and the three types of rated power are provided. It is also possible to control lighting by discriminating.

(Third embodiment)
In this embodiment, an illuminating device provided with any of the high-pressure discharge lamp lighting devices described in the first and second embodiments will be described.
As shown in FIG. 5, the high pressure discharge lamp lighting device 100 is installed separately from the lighting fixture main body 101. The luminaire main body 101 is provided with a concave reflecting shade 102 and a socket (not shown) is provided at the inner center of the reflecting shade 102. The base of the high pressure discharge lamp 3 is screwed into this socket, and the high pressure discharge lamp is loaded. The discharge lamp lighting device 100 has the configuration of the high pressure discharge lamp lighting device described in the first or second embodiment.

  The high pressure discharge lamp lighting device 100 used for the illumination device having such a configuration can determine the rated power in a short time regardless of whether the rated power of the high pressure discharge lamp 3 is 35 W or 70 W. Stable lighting with lamp power is possible.

The block diagram which shows the structure of the high pressure discharge lamp lighting device which concerns on 1st Embodiment of this invention. The figure which shows the waveform of the lamp voltage at the time of starting of the high pressure discharge lamp lighting device which concerns on the same embodiment, and a lamp current. The flowchart which shows the control by the electric power control circuit and lamp discriminating circuit in the embodiment. The block diagram which shows the structure of the high pressure discharge lamp lighting device based on 2nd Embodiment of this invention. The perspective view which shows the structure of the illuminating device based on the 3rd Embodiment of this invention.

Explanation of symbols

  2 ... an electronic ballast, 3 ... a high pressure discharge lamp, 4 ... a lamp voltage detection circuit, 6 ... a lamp discrimination circuit, 7 ... a power control circuit.

Claims (4)

Lamp voltage detection means for detecting the lamp voltage of the high pressure discharge lamp at the start;
A timer that counts with starting;
At the time of starting, the transition from the glow discharge to the arc discharge of the high-pressure discharge lamp is detected by the lamp voltage detected by the lamp voltage detecting means, and the time value of the timer at this time is compared with a set value, thereby connecting Lamp discriminating means for discriminating the rated power of the high-pressure discharge lamp that has been made;
A lighting circuit that controls lighting of the high-pressure discharge lamp based on the rated power determined by the lamp determining means;
A high pressure discharge lamp lighting device comprising:   The lamp discriminating means discriminates the rated power of the high-pressure discharge lamp at the first start after replacing the high-pressure discharge lamp, and stores the determined result in a memory for starting and lighting control. The high pressure discharge lamp lighting device according to claim 1, wherein the lighting control is performed without determining the rated power until the lamp is replaced. A second timer for timing the extinguishing time of the high pressure discharge lamp;
Correction means for correcting the set value according to the time measured by the second timer;
The high pressure discharge lamp lighting device according to claim 1, comprising: A lighting fixture body;
The high pressure discharge lamp lighting device according to any one of claims 1 to 3, which is attached to the lighting fixture body;
A high-pressure discharge lamp disposed in the luminaire body;
An illumination device comprising:

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