JP2003249382A - Lighting system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To eliminate a sense of incongruity due to the afterglow of a light source when turned off by the stop operation of a power supply by a user. <P>SOLUTION: A control part 3 has an electric failure detecting part 4 for discriminating the presence of power supply using a current signal from a commercial power supply 1. The commercial power supply 1 is rectified so that the power accumulated in a filter capacitor is supplied from a power supply part 7 for a certain time even during cut-off of the commercial power supply 1. A required time after the control part 3 issues a light-on output signal to light-on circuit parts 5, 10 but before the light sources 6, 9 become given lit conditions is different depending on the light sources 6, 9. The light source 9 which requires a shorter time before the light source becomes the given lit condition is supplied with the power in linkage with the current signal from the commercial power supply 1 and the power supply to the light source 9 is cut off immediately when the current signal disappears by the cut-off of the commercial power supply 1. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an illuminating device which controls lighting and extinguishing of a light source through a lighting circuit section in response to a signal from a control section.

[0002]

2. Description of the Related Art A block diagram of a conventional example is shown in FIG. The lighting device 2 connected to the commercial power supply 1 includes two light sources 6 and 9. The power failure detection unit 4 of the control unit 3 uses the voltage obtained by full-wave rectifying the commercial power supply 1 with the diodes D1 and D2 as an energization signal.
Then, the control unit 3 recognizes the presence / absence of the commercial power source 1 and issues a lighting signal to the lighting circuit unit 5 to control the lighting (light-out) state of the light source 6. The power supply unit 7 that rectifies the commercial power supply 1 and accumulates charges in the smoothing capacitor serves as the operating power supply of the control unit 3 so that the power is supplied for a certain period of time even when the commercial power supply 1 is shut off. The lighting circuit unit 5 may also be provided with a power supply unit 8 having a configuration using a smoothing capacitor. When the energization signal disappears, the power failure detection unit 4 determines that there is a power failure and stops the output signal to the lighting circuit unit 5 to turn off the light source 6. Here, for example, for the purpose of using a fluorescent lamp as the light source 6 and avoiding problems such as short life of the fluorescent lamp and non-lighting at the time of starting,
Generally, the lighting circuit unit 5 has various modes such as “preheat → start → lighting”, and after the lighting circuit unit 5 receives a lighting signal from the control unit 3, the light source 6 is in a predetermined lighting state. It may take a while for the user to feel uncomfortable.

If the energization signal is lost even when the power failure is not an original power failure such as noise or power supply phase loss, the power failure detection section 4 determines that there is a power failure and temporarily stops the output signal to the lighting circuit section 5. After that, the energization signal is immediately restored and the output signal to the lighting circuit unit 5 is also restored. However, it takes time for the light source 6 to reach a predetermined lighting state in the lighting circuit unit 5, so that the light source 6 is available to the user. You will feel a sense of incongruity with the change of state. In order to eliminate the discomfort, the delay time is set from the time when the power failure detection unit 4 determines that there is a power failure until the output signal to the lighting circuit unit 5 is stopped.

The operation of the conventional example is shown in the flowchart of FIG. When the light source is turned on, a timer for counting the delay time T after the power failure is started. If no power failure is detected and the power is on, the timer for counting the delay time T is reset (T = 0), and the lighting output from the control unit 3 to the lighting circuit unit 5 is turned on. When a power failure is detected, the light source 6 is kept on until a predetermined time Tx elapses after the power failure is detected, and after the predetermined time Tx elapses, a lighting output from the control unit 3 to the lighting circuit unit 5 is performed. Turn off.
As a result, the first lighting circuit unit 5 stops operating and the first light source 6 is turned off.

Within this delay time Tx, the state of the light source 6 is not changed even if the energization signal disappears, and it is possible to eliminate discomfort for the user. Also, LE
If another light source 9 such as D is also provided and the power source for lighting the same is supplied by the commercial power source 1, the light source 9 is naturally turned off in conjunction with the cutoff of the commercial power source 1. The delay time until the output signal to the lighting circuit unit 10 was stopped was the same as the delay time Tx until the output signal to the lighting circuit unit 5 was stopped, and all were constant.

[0006]

However, if the commercial power source 1 is directly supplied as the power source of the light source 9 as shown in FIG. 8, the light source 9 is naturally turned off in conjunction with the interruption of the commercial power source 1. So there was no problem, but as shown in Figure 9,
As a power source of the light source 9, there is a power source that rectifies the commercial power source 1 and converts it into a direct current and supplies it. In the conventional example of FIG. 9, the lighting circuit section 5 includes a power supply section 8 configured to use a smoothing capacitor,
The power source 8 supplies power to the light source 9 and the power source 7 of the controller 3 supplies power to the second lighting circuit unit 10. This is because the conventional example of FIG.
Unlike the configuration in which power is supplied to the lighting circuit unit 10 and the light source 9, even if the commercial power supply 1 is cut off, the
Power supply to the lighting circuit unit 10 continues, and the first lighting circuit unit 5 continues.
Since the power supply from the power supply unit 8 to the light source 9 also continues, after the power failure detection unit 4 detects the power failure, the control unit 3 counts the delay time of Tx according to the flowchart of FIG. The light source 9 continues to be lit until the output of the lighting signal to the second lighting circuit unit 10 is stopped.
Therefore, even if the user stops the input power to the luminaire, the luminaire apparently does not react immediately and turns off with a delay, and afterglow remains in the meantime, which makes the user feel uncomfortable. I will have.

Also, the user intentionally turns on the input power source.
In the lighting device in which the lighting state can be switched by performing the OFF operation with the presence / absence of the input power as a signal, the control unit 3 must operate even when the input power is OFF, and the following operation is performed after the input power is OFF. The control unit 3 determines the time when the input power ON, which is a signal, can be accepted.
It is indispensable to supply power to the. Therefore, if the power source unit 7 of the control unit 3 is also used for the light source 9, the light source 9 is kept lit, which also shortens the power supply time to the control unit 3.

The present invention has been made in view of the above points, and an object thereof is to provide an illuminating device capable of eliminating the uncomfortable feeling due to the afterglow of the light source when the user turns off the input power supply. Especially.

[0009]

According to the invention of claim 1, in order to solve the above problems, as shown in FIG.
A plurality of light sources 6, 9 and respective lighting circuit parts 5, 10 for lighting the respective light sources 6, 9 and the lighting circuit part 5,
A control unit 3 which outputs a lighting output signal to 10 to control the lighting state of each of the light sources 6 and 9, and a power failure detection unit which is provided in the control unit 3 and determines the presence / absence of a power source by an energization signal of the commercial power source 1. 4 and power sources 7 and 8 that rectify the commercial power source 1 and store it in a smoothing capacitor so that power is supplied for a certain time even when the commercial power source 1 is shut off.
The time required for the light sources 6 and 9 to reach a predetermined lighting state after the lighting output signal is issued to the light source 10 differs depending on the light sources 6 and 9, and the light source 9 having a shorter time until the light source reaches the predetermined lighting state Is supplied with power from the power supply unit 8 in conjunction with the energization signal of the commercial power supply 1 (via the switch element Q in FIG. 1), and when the energization signal disappears due to interruption of the commercial power supply 1, the power supply unit is immediately released. The power source of the light source 9 to which the power source 8 is supplied is cut off.

According to the second aspect of the invention, in order to solve the same problem, as shown in FIG.
Lighting circuits 5 and 10 for lighting the light sources 6 and 9, and a control unit 3 that outputs a lighting output signal to the lighting circuits 5 and 10 to control the lighting state of the light sources 6 and 9. ,
A power failure detection unit 4 provided in the control unit 3 for determining the presence / absence of power by an energization signal of the commercial power source 1, and a commercial power source 1 is rectified so that the commercial power source 1 supplies power for a certain period even when the commercial power source 1 is cut off. The power source units 7 and 8 stored in the smoothing capacitors are provided, and the time required from the control unit 3 issuing a lighting output signal to the lighting circuit units 5 and 10 until the light sources 6 and 9 reach a predetermined lighting state. The light source 9, which differs depending on the light sources 6 and 9 and takes a shorter time to reach a predetermined lighting state, has the power source unit 8 according to the output signal from the control unit 3 (via the switch element Q controlled). Power is being supplied from the
As soon as the power failure detecting unit 4 determines a power failure, the power source of the light source 9, which is supplied with power from the power source unit 8, is shut off by an output signal from the control unit 3.

According to the third aspect of the present invention, in order to solve the same problem, as shown in FIG.
Lighting circuits 5 and 10 for lighting the light sources 6 and 9, and a control unit 3 that outputs a lighting output signal to the lighting circuits 5 and 10 to control the lighting state of the light sources 6 and 9. ,
A power failure detection unit 4 provided in the control unit 3 for determining the presence / absence of a power source based on an energization signal of the commercial power source, and a rectification and smoothing of the commercial power source 1 so that the power is supplied for a certain time even when the commercial power source 1 is cut off. With the power supply units 7 and 8 stored in the capacitor,
The time required for the light sources 6 and 9 to reach a predetermined lighting state after the control unit 3 issues a lighting output signal to the lighting circuit units 5 and 10 varies depending on the light sources 6 and 9, and the commercial power source 1 is cut off to supply an energization signal. Disappears, and after the power failure is detected by the power failure detection section 4, the lighting circuit sections 5, 10 of the respective light sources 6, 9
Delay time Tx, T until the lighting output signal to the
It is characterized in that y is set according to the times T1 and T2 required for the respective light sources 6 and 9 to reach a predetermined lighting state. According to the invention of claim 4, in the lighting device according to any one of claims 1 to 3, as shown in FIG.
The power source of the control unit 3 and the power source of at least one light source 9 are the same, and the power source is a power source that rectifies the commercial power source 1 so as to supply the power source for a certain period of time even when the commercial power source 1 is cut off, and is stored in the smoothing capacitor It is a part 7.

According to the invention of claim 5, in the lighting device according to claim 3, as shown in FIG. 5, the power failure detection section 4 determines the presence or absence of a power source by an energization signal synchronized with the commercial power source 1. , The delay times Tx and Ty are 20 msec or more and 2
One or more delay times less than 0 msec are set, respectively. In FIG. 5, the resistor voltage divider circuit and the transistor Tr constitute a zero-cross detection circuit, and the collector potential of the transistor Tr is the commercial power source 1
However, the detection circuit of the power supply synchronizing signal is not limited to this. If the power supply frequency is 50 Hz, the power supply synchronization signal is generated in a cycle of 10 ms. The power failure detection unit 4 determines that there is a power failure when the power supply synchronization signal disappears. The invention of claim 6 is the same as claim 1.
The lighting device according to any one of items 1 to 5 is provided in the main body of the fixture.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS (Embodiment 1) FIG. 1 shows the configuration of a first embodiment of the present invention. The lighting device 2 connected to the commercial power source 1 includes a first light source 6 made of a fluorescent lamp and a second light source 9 made of an LED as an auxiliary light source. The first light source 6 is a first lighting circuit. Turned on by part 5,
The second light source 9 is turned on by the second lighting circuit unit 10.
The first lighting circuit unit 5 converts the DC voltage obtained by rectifying the AC voltage input from the commercial power source 1 into a high frequency by switching with a switching element to light the fluorescent lamp 6 at a high frequency. The second lighting circuit unit 10 reduces the DC voltage of the first lighting circuit unit 5 to control the lighting of the LED 9. The control unit 3 outputs a lighting signal to the first lighting circuit unit 5 and the second lighting circuit unit 10. The control unit 3 is provided with a power failure detection unit 4 that determines the presence or absence of a power source based on an energization signal obtained from the commercial power source 1 via the diodes D1 and D2. The power supply for operating the control unit 3 is supplied from the power supply unit 7 including a smoothing capacitor that is charged with the voltage obtained by rectifying the commercial power supply 1. Even when the commercial power supply 1 is shut off, the power is supplied to the control unit 3 for a certain period of time. Can be supplied. The first lighting circuit unit 5 also includes a power supply unit 8 similarly configured to use a smoothing capacitor.

A power failure detection unit 4 of the control unit 3 uses a voltage obtained by full-wave rectifying the commercial power supply 1 with diodes D1 and D2 as an energization signal.
Then, the control unit 3 recognizes the presence / absence of the commercial power source 1 and issues a lighting signal to the lighting circuit unit 5 to control the lighting (light-out) state of the light source 6. When the energization signal disappears, the power failure detection unit 4
Determines that there is a power outage and tries to turn off the light source 6
To stop the lighting signal output to.

Here, the fluorescent lamp 6 which is turned on in the first lighting circuit section 5 is brought into a predetermined lighting state through each step of "preheating → starting → lighting" after receiving a lighting signal from the control section 3. The light source has a time of about 1 second. The LED 9 that is turned on by the second lighting circuit unit 10 is an auxiliary light source that is turned into a predetermined lighting state when there is a power supply and a lighting signal from the control unit 3. The power from the power supply unit 8 in the first lighting circuit unit 5 that is supplied to the LED 9 and the second lighting circuit unit 10 is configured to be supplied / interrupted according to the presence or absence of the energization signal. When the commercial power source 1 is cut off, the commercial power source 1 is connected to the diodes D1 and D2.
The full-wave rectified energization signal disappears, the switch element Q opens, the power of the second lighting circuit unit 5 is cut off, and the LED 9
Turns off.

The operation of this embodiment is shown in the flowchart of FIG. When the light source is turned on, a timer for counting the delay time T after the power failure is started. If no power failure is detected and the power is on, the timer for counting the delay time T is reset (T = 0), and the lighting output from the control unit 3 to the lighting circuit units 5 and 10 is turned on. When a power failure is detected, first, if the lighting circuit unit is a lighting circuit unit that does not require time to restart, the power source of the light source is turned off.
That is, the second light source 9 is turned off. Further, even if a power failure is detected, if the lighting circuit section requires time for restarting, the light source is kept on until a predetermined time Tx elapses after the power failure is detected, and the predetermined time Tx is After a lapse of time, the lighting output from the control unit 3 to the lighting circuit unit 5 is turned off. As a result, the first lighting circuit unit 5 stops operating,
The first light source 6 is turned off.

(Second Embodiment) FIG. 2 shows the configuration of the second embodiment of the present invention. Although the configuration is substantially the same as that of the first embodiment of the present invention, the power from the power supply unit 8 in the first lighting circuit unit 5 that is supplied to the LED 9 and the second lighting circuit unit 10 is
A configuration is adopted in which the output signal of the control unit 3 is used for interruption. When the commercial power supply 1 is cut off, the energization signal disappears, and when the power failure detection unit 4 determines that there is a power failure, the switch element Q is turned off by the output signal from the control unit 3 and the power supply of the second lighting circuit unit 10 is cut off. As a result, the LED 9 is turned off. The operation of this embodiment is similar to that of the flowchart of FIG.

(Embodiment 3) FIG. 3 shows the configuration of a third embodiment of the present invention. Although the configuration is substantially the same as that of the first embodiment of the present invention, when the input power is cut off, the energization signal disappears, and when the power failure detection unit 4 determines that there is a power failure, the lighting output signal from the control unit 3 is blocked, The light sources 6 and 9 are turned off. However, the delay time from the judgment of the power failure to the interruption of the lighting output signal is different between the light sources 6 and 9, and the light source 6 emits a lighting output signal to the lighting circuit unit 5 after the control unit 3 issues a predetermined lighting state. It is assumed that it takes T1 time to reach T2, and T2 time is required for the light source 9 to reach a predetermined lighting state after the control unit 3 issues a lighting output signal to the lighting circuit unit 10.
T1> T2. Here, the time T2 is a time when the user does not feel uncomfortable even if the light source 9 is turned off during this time. On the other hand, the time T1 is a time when the user feels uncomfortable if the light source 6 is turned off during this time.

Therefore, in this embodiment, the control unit 3
The delay time for interrupting the lighting signal output from the lighting circuit units 5 and 10 to each lighting circuit unit is set for each light source and each lighting circuit. Is Tx, and the delay time until the control unit 3 cuts off the lighting output signal to the lighting circuit unit 10 is Ty, the delay time is Tx> Ty. It is set. That is, when the time it takes for the light source to reach a predetermined lighting state is short, the lighting signal is cut off early to prevent afterglow of the light source, thereby eliminating discomfort for the user. Further, even if a momentary power failure is detected due to a phase loss or noise, the user does not feel uncomfortable because the time required to reach a predetermined lighting state is short when the lighting signal is restored.

The operation of this embodiment is shown in the flowchart of FIG. When the light source is turned on, a timer for counting the delay time T after the power failure is started. If no power failure is detected and the power is on, the timer for counting the delay time T is reset (T = 0), and the lighting output from the control unit 3 to the lighting circuit units 5 and 10 is turned on. When a power failure is detected, first, if the lighting circuit section requires a time T1 for restarting, after the power failure is detected, a predetermined time T
The light source is kept on until x has passed, and a predetermined time T
After x has elapsed, the lighting output from the control unit 3 to the lighting circuit unit 5 is turned off. As a result, the first lighting circuit unit 5 stops its operation after a lapse of a predetermined time Tx after the power failure, and the first light source 5 is turned off. In addition, the lighting circuit section takes time T to restart.
In the case of the lighting circuit unit that requires 2, the lighting of the light source is maintained until the predetermined time Ty elapses after the power failure is detected, and after the predetermined time Ty elapses, the lighting from the control unit 3 to the lighting circuit unit 10 is performed. Turn off the output. As a result, the second lighting circuit unit 10 stops its operation after a lapse of a predetermined time Ty after the power failure, and the second light source 10 is turned off.

(Embodiment 4) FIG. 4 shows the configuration of a fourth embodiment of the present invention. Although the configuration is almost the same as that of the third embodiment of the invention, in the present embodiment, the power source of the light source 9 such as an LED is shared with the power source section 7 of the control section 3. That is, the control unit 3 and the light source 9 have the same power supply, and the power is supplied for a certain time even when the commercial power supply 1 is cut off.
The power supply unit 7 rectified the commercial power supply 1 and stored in the smoothing capacitor is used, and the light source 9 can be turned on while the control unit 3 is operating. Then, the light source 9 is quickly turned off to prevent afterglow, the power consumption of the control unit 3 when the commercial power source 1 is cut off is reduced, and the operation time of the control unit 3 is extended. The operation of this embodiment may be performed by either the flowchart of FIG. 6 or FIG. 7, but Ty = 0 in the flowchart of FIG.
6 corresponds to the case of setting
The effect of reducing the power consumption of the control unit 3 and extending the operation time of the control unit 3 at the time of shutting off is great.

(Embodiment 5) FIG. 5 shows the configuration of a fifth embodiment of the present invention. The operation of this embodiment is similar to that of the flowchart of FIG. The configuration is almost the same as that of the fourth embodiment of the present invention, except that a power failure determination is performed using a power supply synchronization signal by zero-cross detection as an energization signal. Control unit 3
Is supplied with a power-on signal synchronized with the power-source frequency from the commercial power source 1 via the diodes D1 and D2, and the power failure detection unit 4 determines the presence or absence of the power source based on this power-on signal. The energization signal synchronized with the power supply frequency is 10 ms if 50 Hz
The energization signal is generated in the cycle.

The delay time Tx to the first lighting circuit unit 5 is 20 m, which is so long that the user feels a sense of discomfort after the lighting output signal is received from the control unit 3 until a predetermined lighting state is reached.
Set to s or more. With this setting, the light source 6 such as a fluorescent lamp that takes time to restart can be left in the original state even if the power supply synchronization signal is missed by one and the power failure is determined due to phase loss or noise. it can. In addition, the delay time Ty to the second lighting circuit unit 10 is less than 20 ms so that the time from receiving the lighting output signal from the control unit 3 to reaching the predetermined lighting state is so short that the user does not feel uncomfortable. Set to. As a result, when the power supply synchronization signal is lost due to phase loss or noise and a power failure is determined, the light source 9 such as an LED can be turned off. In addition, in the present embodiment, by using the power supply synchronization signal as the energization signal, it is possible to support phase control when an incandescent bulb is used as the light source 9, and the control unit 3 can be shared.

[0024]

According to the first aspect of the present invention, the commercial power source is used as the power source of the light source, and the power source stored in the smoothing capacitor is used. The control section issues a lighting output signal to the lighting circuit section. If the time it takes to reach the lighting state is short enough that users do not feel uncomfortable, shut off the light source by turning it off to prevent afterglow after a power failure.
It is possible to eliminate user discomfort. The invention of claim 2 is the same as the invention of claim 1, preventing afterglow after a power failure,
It is possible to eliminate the user's discomfort and to turn off the light source by shutting off the power source of the light source by the output signal from the control unit during a power failure. Therefore, a configuration for detecting the energization signal is provided rather than the invention of claim 1. Can be simplified.

The invention according to claim 3 has the same effect as the invention according to claims 1 and 2, and the delay time at the time of shutting off the lighting signal output from the control portion to each lighting circuit portion at the time of power failure is classified by the light source. , Since each lighting circuit is set, claim 1,
As compared with the second aspect of the invention, the configuration for shutting off the power can be omitted. The invention of claim 4 has the same effects as those of claims 1 to 3, and since the power source of the light source is shared with the power source of the control unit, the power consumption at the time of power failure is suppressed, and the smoothing capacitor having a small capacity is provided. Can be used, and the operation time of the control unit can be extended. According to the invention of claim 5, by using the power supply synchronizing signal as the energizing signal, it is possible to correspond to the phase control of the incandescent bulb, and the control unit can be shared.

[Brief description of drawings]

FIG. 1 is a block circuit diagram showing a configuration of a first embodiment of the present invention.

FIG. 2 is a block circuit diagram showing a configuration of a second embodiment of the present invention.

FIG. 3 is a block circuit diagram showing a configuration of a third embodiment of the present invention.

FIG. 4 is a block circuit diagram showing a configuration of a fourth embodiment of the present invention.

FIG. 5 is a block circuit diagram showing a configuration of a fifth embodiment of the present invention.

FIG. 6 is a flowchart showing the operation of Embodiments 1 and 2 of the present invention.

FIG. 7 is a flowchart showing the operation of Embodiments 3, 4, and 5 of the present invention.

FIG. 8 is a block circuit diagram showing a configuration of Conventional Example 1.

FIG. 9 is a block circuit diagram showing a configuration of a second conventional example.

FIG. 10 is a flowchart showing the operation of Conventional Examples 1 and 2.

[Explanation of symbols]

1 Commercial power supply 2 lighting equipment 3 control unit 4 Power failure detection section 5 First lighting circuit section 6 light source (fluorescent lamp) 7 power supply 8 power supply 9 Light source (LED) 10 Second lighting circuit section

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Claims (6)

[Claims] 1. A plurality of light sources, respective lighting circuit units for lighting each of the light sources, a control unit for issuing a lighting output signal to the lighting circuit unit, and controlling the lighting state of each light source.
A power failure detection unit is provided in the control unit that determines the presence / absence of power by a power supply signal of the commercial power supply, and the commercial power supply is rectified and stored in a smoothing capacitor so that the power is supplied for a certain time even when the commercial power supply is cut off. A time period required for the light source to reach a predetermined lighting state after the control unit issues a lighting output signal to the lighting circuit section, and a time period required for the light source to reach a predetermined lighting state. The shorter light source is supplied with power from the power supply unit in conjunction with the power supply signal of the commercial power supply, and when the power supply signal disappears due to the cutoff of the commercial power supply, the light source that is supplied with power from the power supply unit immediately A lighting device characterized by cutting off power. 2. A plurality of light sources, respective lighting circuit units for lighting each of the light sources, a control unit for issuing a lighting output signal to the lighting circuit unit and controlling a lighting state of each light source.
A power failure detection unit is provided in the control unit that determines the presence / absence of power by a power supply signal of the commercial power supply, and the commercial power supply is rectified and stored in a smoothing capacitor so that the power is supplied for a certain time even when the commercial power supply is cut off. A time period required for the light source to reach a predetermined lighting state after the control unit issues a lighting output signal to the lighting circuit section, and a time period required for the light source to reach a predetermined lighting state. The shorter light source is supplied with power from the power supply unit by the output signal from the control unit, and when the energization signal disappears due to the commercial power interruption, the power failure detection unit immediately determines from the power failure from the control unit. A lighting device, characterized in that the power of a light source, which is supplied with power from the power supply unit, is shut off by an output signal. 3. A plurality of light sources, a lighting circuit section for lighting each of the light sources, a control section for issuing a lighting output signal to the lighting circuit section, and controlling a lighting state of each light source.
A power failure detection unit is provided in the control unit that determines the presence / absence of power by a power supply signal of the commercial power supply, and the commercial power supply is rectified and stored in a smoothing capacitor so that the power is supplied for a certain time even when the commercial power supply is cut off. A power supply unit is provided, and the time required from the control unit issuing a lighting output signal to the lighting circuit unit until the light source reaches a predetermined lighting state varies depending on the light source, and the energization signal disappears when commercial power is cut off, thereby detecting the power failure. The delay time from when a power failure is discriminated by the unit until the lighting output signal to the lighting circuit unit of each light source is stopped is set according to the time required for each light source to reach a predetermined lighting state. Lighting equipment. 4. The power source of the control unit and the power source of at least one light source are the same, and the power source is rectified and stored in a smoothing capacitor so that the power source is supplied for a certain period of time even when the commercial power source is cut off. It is a power supply part, The illuminating device in any one of Claims 1-3 characterized by the above-mentioned. 5. The power failure detection unit determines the presence or absence of a power source by an energization signal synchronized with a commercial power source, and the delay time is 20
4. The lighting device according to claim 3, wherein one or more delay times of msec or more and less than 20 msec are set, respectively. 6. A luminaire, wherein the luminaire according to claim 1 is provided in a luminaire body.