JP2018010784A - Illumination power supply circuit and luminaire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an illumination power supply circuit or the like for turning on illumination by power from a battery at blackout.SOLUTION: The illumination power supply circuit, which is connected to an AC power supply through a single-throw switch, is connected to a battery part and an illumination part, so as to be used to turn on and off the illumination part. The illumination power supply circuit includes: a phase detector unit to which an AC waveform can be input from the AC power supply and which detects a phase deviation in the AC waveform; and a switchover part which, when power supply from the AC power supply is stopped, can switch the connection state of a second path between a supply state which supplies the power of the battery part to the illumination part and a non-supply state which does not supply the power of the battery part to the illumination part. When the power supply from the AC power supply is stopped, the supply state and the non-supply state are switched on the basis of the phase deviation detected by the phase detector unit.SELECTED DRAWING: Figure 2

Description

  The present invention relates to an illumination power supply circuit and an illumination device, and more particularly to an illumination power supply circuit and an illumination device that are used by being connected to an AC power supply via a one-way switch.

  In recent years, from the viewpoint of increasing awareness of disaster prevention and improving the safety of facilities, attention has been focused on lighting devices that can be turned on by battery power even in the event of a power failure due to a disaster or the like. For example, an office lighting device is normally turned off when a power failure occurs in an area including the office. However, by setting the lighting device in a state in which power can be supplied from another power source such as a battery, Even if this occurs, the brightness in the office can be secured by turning on the lighting device for a predetermined time. Such an illuminating device avoids a panic due to the occurrence of a power failure and contributes to safe evacuation.

  On the other hand, many lighting devices provided on the ceiling of an office or a house can be switched on and off by an external switch provided on a wall or the like apart from the lighting device. Further, as an external switch provided on a wall or the like, since the lighting device is driven with relatively low power, for example, it is not a double switch that opens both the L side and the N side, but a single switch that opens only one side. Is frequently used.

  As an illumination device that can be turned on even during a power failure, for example, an LED illumination device including a battery has been proposed. Here, as an illumination power supply circuit used in an illumination device that can be turned on using power from a battery at the time of a power failure, it is possible to distinguish between power supply stop when an external switch is turned off and power supply stop due to a power failure. preferable. This is because it is impossible to determine this, and a circuit that always performs a lighting operation with a battery after the power supply from the AC power supply is stopped will hinder free adjustment of indoor illuminance and also increase power consumption. .

  As an illuminating device that can discriminate between the power supply stop when the external switch is turned off and the power supply stop due to a power failure, for example, an external switch or the like pulls a power failure detection wiring separately from the power supply wiring. Yes (see Patent Document 1). In addition, even when the power supply from the AC power supply is stopped, a circuit is proposed in which the lighting operation by the battery is not performed if there is a voltage drop twice or more within a predetermined time (patent) Reference 2 etc.).

Japanese Patent Laid-Open No. 2015-118837 JP 2014-2904 A

  However, in the case of a lighting device using a power supply circuit that needs to draw wiring for detecting a power failure, there is a problem that the installation cost increases because the number of wirings increases. In addition, since many existing lighting devices do not have a power failure detection wiring, the ON / OFF operation from an external switch and the lighting operation during a power failure can be performed normally only by replacing the conventional lighting device. There is a problem that you can not.

  In addition, in the case of a lighting device that detects a voltage drop twice (so-called two times) within a predetermined time and performs a light-off operation, there is an advantage that it can be easily replaced with a conventional lighting device. However, regarding such a lighting device, if a person who does not know the operation method of the external switch tries to perform the ON / OFF operation, there is a risk of confusion. This is because such an illuminating device does not turn off only by performing a single circuit opening operation in the same manner as a normal switch. Further, in such a lighting device, since the number of times of operation of the switch is increased, there is a problem that it takes time to turn off the light more than usual and the durability performance required for the switch is also increased.

  The present invention has been made in view of such problems, and its purpose is to enable lighting by power from a battery in the event of a power outage, which can be easily replaced with existing equipment, and performs special operations. It is to provide a power supply circuit for illumination that can be turned off even if it is not present.

The illumination power supply circuit according to the present invention is electrically connected to an AC power supply through a one-off switch and electrically connected to a battery unit and an illumination unit, and turns on and off the illumination unit. A lighting power circuit,
A first path for supplying power from the AC power source to the illumination unit;
A second path for supplying power of the battery unit to the illumination unit;
An AC waveform from the AC power supply can be input, and a phase detector that detects a phase shift in the AC waveform;
When power supply from the AC power source to the illumination unit via the first path is stopped, a supply state in which power of the battery unit is supplied to the illumination unit, and power of the battery unit is supplied to the illumination unit A switching unit capable of switching a connection state of the second path in a non-supply state.
The switching unit is configured to select the supply state and the non-supply state based on a detection result of the phase detection unit when power supply from the AC power supply is stopped.

  The power supply circuit for illumination according to the present invention is used in such a manner that it is connected to an AC power supply via a one-way switch, and has a phase detector that detects a phase shift. In other words, the phase detection unit detects a characteristic phase shift that occurs when the circuit is opened by the one-way switch, or detects that such a phase shift hardly occurs at the time of a power failure, and detects the result. Is output to the switching unit. The switching unit switches the power supply state from the battery based on the detection result detected by the phase detection unit so that the lighting unit is turned off when the switch is operated, and the lighting unit is turned on by the power from the battery during a power failure. Can be made. The phase detection unit, for example, for an AC circuit formed by an AC power supply and an illumination power supply circuit, a voltage or current change immediately after the circuit is opened by the one-side switch is a voltage or current change immediately after a power failure. The phase shift can be detected by detecting this based on the difference, but the specific method for detecting the phase shift is not particularly limited.

  Since the illumination power supply circuit according to the present invention includes the phase detection unit as described above, it does not require a separate wiring for detecting a power failure and can be easily replaced with existing illumination equipment. In addition, when the supply of power from the AC power supply is stopped, the phase detection unit can recognize from the detection of the phase shift whether the power failure or the external switch has been turned off. Even if it is not performed, the illumination can be turned off by turning off the external switch only once as usual. Further, in the event of a power failure, by automatically supplying power from the battery to the illumination unit, the illumination can be turned on even when power from the AC power supply is interrupted.

  In addition, for example, the illumination power supply circuit according to the present invention may include an AC-DC conversion unit that converts the power from the AC power source into a direct current, and the phase detection unit is an input side of the AC-DC conversion unit. The first path may be electrically connected to the output side of the AC-DC converter.

  A power supply circuit having such an AC-DC conversion unit has LED illumination and a halogen lamp, and can supply power to the illumination unit using a DC power supply via the first path. Further, the phase shift can be appropriately detected by connecting the phase detector to the input side of the AC-DC converter.

The illumination power supply circuit according to the second aspect of the present invention is:
A lighting power supply circuit that is electrically connected to an AC power source through a one-way switch and is electrically connected to a battery unit and a lighting unit, and turns on and off the lighting unit,
A first path for supplying power from the AC power source to the illumination unit;
A second path for supplying power of the battery unit to the illumination unit;
An AC waveform from the AC power supply can be input, and a potential detection unit that detects a residual potential of the AC waveform when power supply from the AC power supply is stopped;
When power supply from the AC power source to the illumination unit via the first path is stopped, a supply state in which power of the battery unit is supplied to the illumination unit, and power of the battery unit is supplied to the illumination unit A switching unit capable of switching a connection state of the second path in a non-supply state.
The switching unit is configured to select the supply state and the non-supply state based on a detection result of the potential detection unit when power supply from the AC power supply is stopped.

  The illumination power supply circuit according to the second aspect of the present invention is used in a mode of being connected to an AC power supply via a one-way switch, and detects a residual potential of an AC waveform when power supply from the AC power supply is stopped. And a potential detection unit. The potential detection unit operates when the power supply from the AC power supply is stopped due to the difference between the residual potential immediately after the circuit is opened by the single-cut switch and the residual potential immediately after the power failure. Therefore, it can be identified whether it is caused by the circuit being opened or caused by a power failure. The switching unit replaces the detection result detected by the phase detection unit described above, or in addition to the detection result detected by the phase detection unit, based on the detection result of the potential detection unit, the power supply state from the battery By switching the switch, the illumination unit can be turned off when the one-way switch is operated, and the illumination unit can be turned on by power from the battery during a power failure.

  In addition, for example, the illumination power supply circuit according to the present invention may further include a third path for supplying power from the AC power supply to the battery unit.

  Since such an illumination power supply circuit has a third path for supplying power to the battery unit, the battery unit is charged with power for turning on the illumination in the event of a power failure without preparing a separate charging circuit. be able to.

Further, an illumination device according to the present invention includes any one of the above illumination power supply circuits
The battery unit electrically connected to the AC power source via the first path;
And the lighting unit electrically connected to the AC power source through the second path.

  Since the lighting device according to the present invention has the above-described lighting power supply circuit, it is possible to turn on the lighting by power from the battery unit at the time of a power failure, and it can be easily replaced with existing equipment, and has a special operation. It can be turned off without performing.

FIG. 1 is a schematic diagram of a lighting device according to an embodiment of the present invention. 2 is a block diagram illustrating a configuration of an illumination power supply circuit included in the illumination device illustrated in FIG. FIG. 3 is a conceptual diagram showing a phase shift detected by a phase detection unit in the illumination power supply circuit shown in FIG. FIG. 4 is a flowchart illustrating an example of control of the switching unit in the illumination power supply circuit. FIG. 5 is a flowchart illustrating another example of the control of the switching unit. FIG. 6 is a block diagram illustrating a configuration of an illumination power supply circuit included in the illumination apparatus according to the second embodiment. FIG. 7 is a conceptual diagram showing the residual potential detected by the potential detection unit in the illumination power supply circuit shown in FIG.

  FIG. 1 is a schematic diagram illustrating a lighting device 30 according to an embodiment of the present invention. The lighting device 30 lights the lighting unit 50 using the power of the lighting unit 50 including the LEDs 52 that emit light upon receiving power, the battery unit 40 that can store the power, and the power of the AC power supply 10 and the battery unit 40. And an illumination power supply circuit 60 to be turned off.

  The illumination power supply circuit 60 is electrically connected to the AC power supply 10 via the one-off switch 20 that is an external switch. The AC power source 10 is, for example, a commercial power source that is supplied from a power generation facility through a power transmission facility, a breaker, and the like. The illumination power circuit 60 includes two lines on the L side (non-grounded side) and the N side (grounded side). Power is supplied from the AC power supply 10 through the wiring. However, the wiring from the AC power supply 10 to the illumination power supply circuit 60 is not limited to this, and the voltage supplied to the illumination power supply circuit 60 is not particularly limited.

  The one-off switch 20 can open and close a circuit formed by wiring the AC power supply 10, the illumination power supply circuit 60, and the illumination device 30 including the same. The single-cut switch 20 is a switch that stops the supply of power from the AC power supply 10 to the illumination power supply circuit 60 by opening only the L side (non-grounded side) of the circuit. Side) and N-side (grounding side) are different from a double-cut switch that opens both together.

  Although the installation position of the illuminating device 30 is not particularly limited, it may be provided at a location that is out of reach, such as an indoor ceiling. On the other hand, the cut-off switch 20 is disposed at a position away from the illumination power supply circuit 60 and the illumination device 30 including the illumination power supply circuit 60. For example, the cut-off switch 20 is placed at a position where a hand such as a wall or a pillar can be reached. Provided.

  The illumination unit 50 includes a substrate 54 and LEDs 52 arranged on the substrate 54. The illumination unit 50 is electrically connected to the illumination power supply circuit 60 (see FIG. 2). The illumination unit 50 may include a plurality of light emitting units such as the LEDs 52, for example, or may include only one light emitting unit. The light emitting unit of the illuminating unit 50 is preferably an LED 52 with low power consumption from the viewpoint of securing the lighting time by the power of the battery unit 40, but is not limited thereto, and may be another light emitting unit such as a halogen lamp. . The illumination unit 50 can emit light by the power from the AC power supply 10 supplied via the illumination power supply circuit 60. Furthermore, the illumination unit 50 can emit light also by power from the battery unit 40 supplied via the illumination power supply circuit 60.

  As shown in FIG. 2, the battery unit 40 includes a BT control IC 42 and a battery main body 44. The BT control IC 42 can control charging / discharging of the battery main body 44 so that the charging / discharging of the battery main body 44 is normally performed. For example, when the battery main body 44 exceeds a predetermined voltage, the BT control IC 42 can stop the supply of power from the illumination power supply circuit 60 to the battery main body 44 and prevent overcharging of the battery main body 44. The battery main body 44 is configured by a chargeable / dischargeable secondary battery such as a lithium ion battery, for example, but the battery main body 44 is not limited thereto, and may be configured by a nickel cadmium battery, a nickel metal hydride battery, or the like. Good.

  In the lighting device 30 according to the present embodiment, the battery unit 40 is housed in the housing of the lighting device 30 together with the lighting unit 50. However, the battery unit 40 is installed separately from the lighting device 30 and wired. For example, the illumination power supply circuit 60 may be electrically connected. The BT control IC 42 may be included in the battery unit 40 as in the present embodiment, but may be included in the illumination power supply circuit 60.

  As shown in FIG. 2, the illumination power supply circuit 60 is used by being electrically connected to the AC power supply 10 via the one-off switch 20 and electrically connected to the battery unit 40 and the illumination unit 50. . The illumination power supply circuit 60 includes a first path 62, a second path 64, a third path 66, an AC-DC conversion unit 68, a phase detection unit 70, and a switching unit 72.

  The illumination power supply circuit 60 includes an AC-DC conversion unit 68 that converts AC power from the AC power supply 10 into DC power. The electric power converted into the direct current by the AC-DC conversion unit 68 is sent to the illumination unit 50 through the first path 62 and is sent to the battery unit 40 through the third path 66.

  The first path 62 supplies power from the AC power supply 10 to the lighting unit 50. The first path 62 always supplies power to the illumination unit 50 and turns on the LED 52 of the illumination unit 50 when the AC power supply 10 is not powered down and the cut-off switch 20 is closed. However, the first path 62 is not limited to this. For example, the first path 62 may be provided with an internal switch that can be remotely controlled and can cut off and connect the power supply to the illumination unit 50. Good.

  The third path 66 supplies power from the AC power supply 10 to the battery unit 40. The third path 66 supplies power to the battery unit 40 and charges the battery main body 44 in a state where the AC power source 10 is not out of power and the cut-off switch 20 is closed. However, when the battery main body 44 is sufficiently charged, the BT control IC 42 stops the supply of power from the AC power supply 10 to the battery main body 44.

  The first path 62 and the third path 66 are electrically connected to the output side of the AC-DC conversion unit 68, and supply DC-converted power to the illumination unit 50 and the battery unit 40. The illumination power supply circuit 60 may include a current (voltage) adjustment unit that adjusts a current value or a voltage value of power supplied to the illumination unit 50 in addition to the AC-DC conversion unit 68. The DC conversion unit 68 functions as a driver that drives the illumination unit 50 in combination with these parts, the first path 62, the second path 64, and the switching unit 72.

  The second path 64 supplies the power of the battery unit 40 to the lighting unit 50. However, the second path 64 includes a switching unit 72 that can switch the connection state of the second path 64. That is, the switching unit 72 switches the connection state of the second path 64 between a supply state in which the power of the battery unit 40 is supplied to the lighting unit 50 and a non-supply state in which the power of the battery unit 40 is not supplied to the lighting unit 50. be able to.

  The switching unit 72 sets the connection state of the second path 64 to the non-supply state while power is being supplied from the AC power supply 10 to the lighting unit 50 via the first path 62. Therefore, power is not supplied from the battery unit 40 to the lighting unit 50 while power is supplied from the AC power supply 10 to the lighting unit 50.

  As will be described later, the switching unit 72 connects the second path 64 based on the detection result of the phase detection unit 70 when the power supply from the AC power supply 10 to the illumination unit 50 via the first path 62 is stopped. The state is switched between a supply state and a non-supply state. When the switching unit 72 sets the connection state of the second path 64 to the supply state, power is supplied from the battery unit 40 to the illumination unit 50 via the second path 64, and the illumination unit 50 is turned on. On the other hand, when the switching unit 72 sets the connection state of the second path 64 to the non-supply state, power is not supplied to the illumination unit 50 from either the AC power supply 10 or the battery unit 40, and the illumination unit 50 is turned off.

  The phase detector 70 can input an AC waveform from the AC power supply 10 and detects a phase shift in the AC waveform. As shown in FIG. 2, the phase detector 70 is electrically connected to the input side of the AC-DC converter 68, and receives an AC waveform before DC conversion. The phase detection unit 70 detects a phase shift that occurs when power supply from the AC power supply 10 is stopped, and allows the switching unit 72 to recognize whether or not a predetermined phase shift has been detected. Output the detection result. The phase detection unit 70 may output to the switching unit 72 only when a predetermined phase shift is detected or only when a predetermined phase shift is not detected. Different outputs may be output to the switching unit 72 depending on whether or not the deviation is detected.

  FIG. 3A shows a circuit formed between the AC power supply 10 and the AC-DC converter 68 of the illumination power supply circuit 60 immediately before and after being opened by turning off the cut-off switch 20. 1 shows an example of a voltage (current) change occurring in the circuit. As shown in FIG. 3A, a circuit between the AC power supply 10 where the AC waveform 80 is detected and the illumination power supply circuit 60 (more specifically, between the AC power supply 10 and the AC-DC converter 68). Immediately after the circuit (1) is opened (OFF) by the one-off switch 20, a voltage (current) change accompanying a phase shift 82 as shown in FIG. Such a phase shift 82 occurs when only one side of the circuit (for example, the non-ground side (L side)) is opened, and only one of the wirings connecting the AC power supply 10 and the illumination power supply circuit 60 (for example, the ground side). (N side)), it is considered that the connection to the AC power supply 10 is left and the connection is asymmetrical. The time at which the phase shift 82 appears as a voltage (current) change varies depending on the AC frequency or the like, but is, for example, about 0.1 to 100 ms after the circuit is opened.

  FIG. 3B illustrates an example of voltage (current) fluctuation that occurs in a circuit formed between the AC power supply 10 and the illumination power supply circuit 60 immediately before and after the AC power supply 10 fails. It is. As shown in FIG. 3 (b), immediately after the AC power supply 10 fails, unlike the case of the one-off switch 20OFF shown in FIG. 3 (a), there is almost no phase shift, and FIG. No voltage (current) change as shown in FIG.

  The phase detector 70 shown in FIG. 2 detects a phase shift 82 (see FIG. 3A) that occurs when the circuit is opened by the one-off switch 20, or such a phase shift during a power failure. By detecting a waveform in which 82 is not seen (see FIG. 3B), it is possible to detect whether or not a phase shift 82 has occurred. For example, as a detection circuit for detecting the phase shift 82, a difference with respect to a waveform in which the phase shift hardly occurs as shown in FIG. 3B is detected, or a voltage (current) change accompanying the phase shift 82 is detected. A circuit that amplifies the noise seen in the signal is detected, but is not particularly limited. Further, the phase detection unit 70 can use the power of the battery unit 40 as necessary when detecting the phase shift 82. For example, the phase detection unit 70 may amplify and detect the phase shift 82 and the noise included in the phase shift 82 shown in FIG.

  FIG. 4 is a flowchart illustrating an example of switching control performed by the switching unit 72 in the illumination power supply circuit 60 illustrated in FIGS. 1 and 2. In the following description, a case where the phase detection unit 70 of the illumination power supply circuit 60 detects a phase shift 82 (FIG. 3A) that occurs when the circuit is opened by the one-side switch 20 is taken as an example. , Explain.

  In step S001 shown in FIG. 1, the switching unit 72 starts control. For example, the switching unit 72 starts the control when the power supply from the AC power supply 10 that has been interrupted is resumed. The power supply from the AC power supply 10 is such that an operator who wants to turn on the lighting device 30 operates the one-way switch 20 to close a circuit formed between the AC power supply 10 and the lighting device 30. Then it is resumed.

  The switching unit 72 that has started the control sets the connection state of the second path 64 to the non-supply state in step S002 shown in FIG. Therefore, the power of the battery unit 40 is not supplied to the lighting unit 50. On the other hand, when the power supply from the AC power supply 10 to the illumination power supply circuit 60 is resumed, the illumination unit 50 is supplied with power from the AC power supply 10 via the first path 62, and from the AC power supply 10. The LED 52 is turned on by the electric power. If the battery main body 44 is not fully charged, the battery unit 40 is supplied with power from the AC power supply 10 via the third path 66, and the battery main body 44 is charged.

  In step 003, the switching unit 72 detects whether or not the power supply from the AC power supply 10 is stopped. When the power supply from the AC power supply 10 is not stopped, that is, while the power supply from the AC power supply 10 to the illumination power supply circuit 60 is continued, the switching unit 72 does not supply the connection state of the second path 64. Maintain state. On the other hand, when the switching unit 72 detects that the power supply from the AC power supply 10 is stopped, the switching unit 72 proceeds to the process of step S004.

  In step S 004, the switching unit 72 determines whether or not the phase shift 82 is detected by the phase detection unit 70. When the phase detector 70 detects a characteristic phase shift 82 (see FIG. 3A) when the circuit is opened by the one-off switch 20, the switching unit 72 uses the second path 64. Is maintained in the non-supply state, and the process is terminated (step S006). In this case, since no power is supplied to the illumination unit 50 from the AC power source 10 or the battery unit 40, the LED 52 is turned off.

  On the other hand, when the phase shift 82 (see FIG. 3A) is not detected in the phase detector 70, the switching unit 72 changes the second path 64 to the supply state (step S005). Thereby, the electric power from the battery part 40 is supplied to the illumination part 50 via the 2nd path | route 64, and LED52 lights. In addition, when the LED 52 of the illumination unit 50 is turned off when the power supply from the AC power supply 10 is stopped immediately before ("YES" in step S004), the connection state of the second path 64 is switched, so that the LED 52 Lights up again. Since the switching unit 72 ends the process while the second path 64 is in the supply state (step S006), the illumination unit 50 continues to light the LED 52 even after the end of the process as long as power supply from the battery unit 40 continues. . The LED 52 is eventually turned off as the voltage of the battery body 44 drops.

  As described above, the illumination power supply circuit 60 shown in FIGS. 1 and 2 uses the phase detection unit 70 that detects the phase shift 82 to stop the supply of power from the AC power supply 10 to the illumination power supply circuit 60. However, it is possible to identify whether it is due to the OFF operation of the one-way switch 20 or due to a power failure of the AC power supply 10. As shown in FIG. 1, the phase detector 70 can perform the above determination without providing wiring from the AC power supply 10 side with respect to the one-way switch 20, and thus can be easily replaced with existing lighting equipment. . Further, in the illumination power supply circuit 60, the phase detection unit 70 detects from the presence or absence of a phase shift whether the power supply stop is due to a power failure or the external switch is turned off, and the detection result is obtained. Based on this, the switching unit 72 controls lighting of the illumination unit 50. Therefore, the user can turn off the illumination unit 50 by turning off the external switch only once as usual, without performing a special operation on the one-off switch 20.

  Moreover, since the illumination power supply circuit 60 does not need to perform a special operation to turn off the illumination unit 50, the person who operates the switch for the first time can perform the turn-off operation without being confused. Therefore, the lighting power supply circuit 60 can be applied to places such as public facilities and time-rental facilities regardless of the purpose and nature of the facilities. In addition, since it is not necessary to operate the single-sided switch 20 a plurality of times to turn off the illumination unit 50, the illumination unit 50 can be quickly turned off. Further, the endurance life of the one-piece switch 20 is not adversely affected.

  While the present invention has been described with reference to the embodiments, it is needless to say that the present invention is not limited to these embodiments, and the technical scope of the present invention includes other embodiments and modifications. . For example, in the lighting device 30, the illumination power supply circuit 60 is housed inside the housing that houses the illumination unit 50, but the illumination power supply circuit 60 is different from the housing that houses the illumination unit 50. It may be accommodated in the housing and may be arranged away from the illumination unit 50.

  Further, the control method of the switching unit 72 is not limited to the method shown in FIG. 4, and based on the detection result of the phase detection unit 70, the second path 64 is in a supply state when the power supply is stopped due to a power failure of the AC power supply 10. Other methods may be used as long as the second path 64 is not supplied when power supply is stopped due to the operation of the one-piece switch 20.

  FIG. 5 is a flowchart illustrating a control method according to a modified example of the switching unit 72. In the control method shown in FIG. 5, as an example, the phase detection unit 70 of the illumination power supply circuit 60 detects a power supply stop (state shown in FIG. 3 (b)) that hardly causes a phase shift. Give an explanation. In steps S101 and S102 in FIG. 5, the same control as in steps S001 and S002 shown in FIG. 4 is performed.

  As shown in step S103 of FIG. 5, in the control method according to the modification, the switching unit 72 changes the connection state of the second path 64 when the phase detection unit 70 detects a power supply stop that does not cause a phase shift. The supply state is changed (step S104). Thereby, even if the supply of electric power from the AC power supply 10 is stopped due to a power failure, the connection state of the second path 64 becomes the supply state, whereby electric power is supplied from the battery unit 40 to the illumination unit 50, and the illumination unit 50. LED 52 lights up.

  On the other hand, the switching unit 72 maintains the connection state of the second path 64 in the non-supply state unless the phase detection unit 70 detects a power supply stop that does not cause a phase shift. Therefore, in this state, when the supply of power from the AC power supply 10 to the illumination power supply circuit 60 is stopped by turning off the cut-off switch 20, the power is not supplied to the illumination unit 50, and the LED 52 is turned off. As described above, the phase detection unit 70 may detect a phase shift 82 that occurs when the circuit is opened by the one-off switch 20, and the AC power source 10 may have a different waveform during a power failure. It may be one that detects (in other words, one that detects a power supply stop that causes almost no phase shift 82), or both.

  FIG. 6 is a block diagram illustrating a configuration of the illumination device 130 according to the second embodiment. The illumination power supply circuit 160 included in the illumination device 130 is included in the illumination device 30 according to the first embodiment except that the illumination power supply circuit 160 includes a potential detection unit 170 and a switching unit 172 instead of the phase detection unit 70 and the switching unit 72. The illumination power supply circuit 60 is the same as the above. Therefore, in the description of the illumination power supply circuit 160, only differences from the illumination power supply circuit 60 will be described.

  The potential detector 170 detects the residual potential VR of the AC waveform 80 when the power supply from the AC power supply 10 is stopped. For example, the potential detection unit 170 detects a process in which the potential from the AC power supply 10 disappears when the power supply from the AC power supply 10 is stopped. When the circuit is opened (OFF) by the one-off switch 20, as shown in FIG. 7, a residual potential VR of the AC waveform 80 is generated in the process in which the potential by the AC power source 10 disappears. For example, immediately after the circuit is opened (OFF) by the one-off switch 20, the residual potential VR is supplied from the one-off switch 20 to the AC-DC conversion unit 68 and from the AC-DC conversion unit 68 to the AC power source 10 (ground side ( N side)) and detected as current and voltage.

  That is, as shown in FIG. 7, when the circuit is opened (OFF) by the one-off switch 20, the potential is not immediately lost as in the case where the power supply is stopped due to a power failure (see FIG. 3B), A residual potential VR is generated. When such a residual potential VR is opened only on one side of the circuit (for example, the non-ground side (L side)), only one of the wirings connecting the AC power supply 10 and the illumination power supply circuit 160 (for example, the ground side ( N side)), and it is considered that the connection to the AC power supply 10 is left and the connection state is asymmetric. Note that the time at which the residual potential VR appears as a current (voltage) varies depending on the AC frequency or the like, but is, for example, about 0.1 to 100 ms after the circuit is opened.

  The potential detector 170 shown in FIG. 6 detects a residual potential VR (see FIG. 7) generated when the circuit is opened by the one-off switch 20, or such a residual potential VR is not seen during a power failure. By detecting the waveform (see FIG. 3B), it is possible to detect whether or not the residual potential VR has occurred. The potential detector 170 detects the residual potential VR generated when the power supply from the AC power supply 10 is stopped, and allows the switching unit 72 to recognize whether or not a predetermined phase shift has been detected. Output the detection result. Note that, similarly to the phase detection unit 70, the potential detection unit 170 may detect the residual potential VR using the power from the battery unit 40.

  The switching unit 172 includes a supply state in which the power of the battery unit 40 is supplied to the lighting unit 50 based on the potential detected by the potential detection unit 170 when the power supply from the AC power supply 10 is stopped, and the power of the battery unit 40 Is switched to a non-supplying state in which the lighting unit 50 is not supplied.

  The illumination device 130 and the illumination power circuit 160 according to the second embodiment have the same effects as the illumination device 30 and the illumination power circuit 60 according to the first embodiment. The illumination power supply circuits 60 and 160 may include both the phase detection unit 70 and the potential detection unit 170. In this case, the switching units 72 and 172 include the phase detection unit 70 and the potential detection unit 170. The connection state of the second path 64 can be switched using both detection results.

DESCRIPTION OF SYMBOLS 10 ... AC power supply 20 ... Single piece switch 30, 130 ... Illuminating device 40 ... Battery part 42 ... BT control IC
44 ... Battery body 50 ... Lighting part 52 ... LED
54 ... Substrate 60, 160 ... Illumination power supply circuit 62 ... First path 64 ... Second path 66 ... Third path 68 ... AC-DC conversion unit 70 ... Phase detection unit 72, 172 ... Switching unit 170 ... Potential detection unit

Claims (5)

A lighting power supply circuit that is electrically connected to an AC power source through a one-way switch and is electrically connected to a battery unit and a lighting unit, and turns on and off the lighting unit,
A first path for supplying power from the AC power source to the illumination unit;
A second path for supplying power of the battery unit to the illumination unit;
An AC waveform from the AC power supply can be input, and a phase detector that detects a phase shift in the AC waveform;
When power supply from the AC power source to the illumination unit via the first path is stopped, a supply state in which power of the battery unit is supplied to the illumination unit, and power of the battery unit is supplied to the illumination unit A switching unit capable of switching a connection state of the second path in a non-supply state.
When the power supply from the AC power supply stops, the switching unit selects the supply state and the non-supply state based on the detection result of the phase detection unit. .   An AC-DC converter that converts the power from the AC power source into a direct current; the phase detector is electrically connected to an input side of the AC-DC converter; and the first path is the AC-DC The illumination power supply circuit according to claim 1, wherein the illumination power supply circuit is electrically connected to an output side of the DC conversion unit. A lighting power supply circuit that is electrically connected to an AC power source through a one-way switch and is electrically connected to a battery unit and a lighting unit, and turns on and off the lighting unit,
A first path for supplying power from the AC power source to the illumination unit;
A second path for supplying power of the battery unit to the illumination unit;
An AC waveform from the AC power supply can be input, and a potential detection unit that detects a residual potential of the AC waveform when power supply from the AC power supply is stopped;
When power supply from the AC power source to the illumination unit via the first path is stopped, a supply state in which power of the battery unit is supplied to the illumination unit, and power of the battery unit is supplied to the illumination unit A switching unit capable of switching a connection state of the second path in a non-supply state.
When the power supply from the AC power supply is stopped, the switching unit selects the supply state and the non-supply state based on the detection result of the potential detection unit. .   4. The illumination power supply circuit according to claim 1, further comprising a third path for supplying power from the AC power source to the battery unit. 5. The power supply circuit for illumination according to any one of claims 1 to 4,
The battery unit electrically connected to the AC power source via the first path;
The illumination unit electrically connected to the AC power source via the second path;
A lighting device.

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