JP2023161919A - Lighting device and emergency lighting equipment - Google Patents

Abstract

An object of the present invention is to provide a lighting device and an emergency lighting fixture that can suppress an increase in the time required to detect a power outage even if a power outage occurs in a regular power supply during an inspection or while the lights are constantly turned off.
SOLUTION: In the lighting device 1, the dummy load circuit 16 is in a conductive state where an intermediate voltage (Vi) of a smoothing capacitor (C1) is applied and a dummy current (Id) generated by the intermediate voltage (Vi) flows. and a cutoff state in which the dummy current (Id) is cut off. Control circuit 14 controls dummy load circuit 16 . When at least one of the charging circuit 12 and the regular lighting circuit 10 stops operating, the control circuit 14 switches the dummy load circuit 16 from a cutoff state to a conduction state.
[Selection diagram] Figure 1

Description

The present disclosure relates to a lighting device and an emergency lighting fixture.

The lighting device of Patent Document 1 includes a regular lighting circuit, a charging circuit, and an emergency lighting circuit. The regular lighting circuit lights up the regular light source using the regular power source. The charging circuit charges the storage battery. The emergency lighting circuit lights up the emergency light source using power supplied from the storage battery during a power outage of the regular power source. Then, upon receiving the input of the trigger signal for starting the inspection operation, the lighting device executes the inspection operation in which the charging circuit is stopped, the emergency lighting circuit is operated, and the second light source is turned on.

JP2021-96938A

In the lighting device as described in Patent Document 1, if a power outage occurs in the regular power supply during an inspection in which the charging circuit and the regular lighting circuit are stopped, or during a permanent turn-off in which the regular lighting circuit is stopped and the light source is turned off, the power outage is detected. The problem was that it took a long time.

An object of the present disclosure is to provide a lighting device and an emergency lighting fixture that can suppress an increase in the time required to detect a power outage even if the regular power supply is out of service during an inspection or while the lights are constantly turned off.

A lighting device according to one aspect of the present disclosure includes a regular lighting circuit, an emergency lighting circuit, a charging circuit, a power failure detection circuit, a dummy load circuit, and a control circuit. The regular lighting circuit lights up the light source with regular power supplied from a regular power source, and the emergency lighting circuit lights the light source with emergency power supplied from an emergency power source. The charging circuit charges the emergency power source with the regular power. The power outage detection circuit detects a power outage of the commercial power source when an intermediate voltage, which is a voltage generated by the commercial power source, becomes less than a threshold value. The dummy load circuit can switch between a conduction state in which the intermediate voltage is applied and a dummy current generated by the intermediate voltage flows, and a cutoff state in which the dummy current is interrupted. The control circuit controls the dummy load circuit. The control circuit switches the dummy load circuit from the cutoff state to the conduction state when at least one of the charging circuit and the regular lighting circuit stops operating.

An emergency lighting device according to an aspect of the present disclosure includes the above-described lighting device, the light source lit by the lighting device, the emergency power source, the lighting device, the light source, and the emergency power source. It is equipped with a vessel for carrying out.

As described above, the present disclosure has the effect of suppressing an increase in the time required to detect a power outage even if a power outage occurs in the regular power supply during an inspection or while the lights are constantly turned off.

FIG. 1 is a block diagram showing a lighting device according to an embodiment of the present disclosure. FIG. 2 is an external perspective view of an emergency lighting fixture including the lighting device as described above. FIG. 3 is an exploded perspective view of the emergency lighting device same as above. FIG. 4 is a circuit diagram showing a dummy load circuit of the above lighting device. FIG. 5 is a waveform diagram showing the operation of the above lighting device. FIG. 6 is a block diagram showing a lighting device of a comparative example. FIG. 7 is a waveform diagram showing the operation of the lighting device of the comparative example. FIG. 8 is a waveform diagram showing another operation of the lighting device of the comparative example. FIG. 9 is a block diagram showing a lighting device according to a first modification example of the present disclosure.

A lighting device 1 and an emergency lighting fixture A1 according to an embodiment of the present disclosure will be described in detail with reference to the drawings. However, each figure described in the following embodiments is a schematic diagram, and the respective ratios of the sizes and thicknesses of each component do not necessarily reflect the actual size ratios. Note that the configuration described in the embodiments below is only an example of the present disclosure. The present disclosure is not limited to the following embodiments, and various changes can be made depending on the design etc. as long as the effects of the present disclosure can be achieved.

(1) Overview As shown in FIG. 1, the lighting device 1 according to the embodiment includes a regular lighting circuit 10, an emergency lighting circuit 11, a charging circuit 12, a power outage detection circuit 13, a dummy load circuit 16, A control circuit 14 is provided. The regular lighting circuit 10 lights up an LED (Light Emitting Diode) 2 (light source) with regular power supplied from a commercial AC power source P1 (common power source). The emergency lighting circuit 11 lights up the LED 2 with emergency power supplied from the battery unit B1 (emergency power source). The charging circuit 12 charges the battery unit B1 with common power. The power outage detection circuit 13 detects a power outage of the commercial AC power source P1 when the intermediate voltage Vi, which is a voltage generated by the commercial power, becomes less than the threshold value Vt (see FIG. 5). The dummy load circuit 16 can switch between a conductive state in which an intermediate voltage Vi is applied and a dummy current Id generated by the intermediate voltage Vi flows, and a cutoff state in which the dummy current Id is interrupted. Control circuit 14 controls dummy load circuit 16 . Then, when at least one of the charging circuit 12 and the regular lighting circuit 10 stops operating, the control circuit 14 switches the dummy load circuit 16 from the cutoff state to the conduction state.

In the lighting device 1 described above, when at least one of the charging circuit 12 and the regular lighting circuit 10 is out of operation during inspection, the dummy current Id generated by the intermediate voltage Vi flows through the dummy load circuit 16. Therefore, the lighting device 1 can suppress an increase in the time required to detect a power outage even if the commercial AC power source P1 has a power outage during inspection or while the lights are constantly turned off.

(2) Details of the emergency lighting fixture according to the embodiment The emergency lighting fixture A1 (hereinafter abbreviated as emergency lighting fixture A1) according to the embodiment will be described in detail with reference to the drawings. The emergency lighting fixture A1 described below is an evacuation exit guide light installed at an evacuation exit or a passageway to an evacuation exit of a building such as an office or a store. However, the emergency lighting equipment according to the embodiment is not limited to the evacuation exit guide light, and may, for example, be a stairway guide light installed in a stairwell in a building, or an emergency light installed on the ceiling of a room, etc. It doesn't matter. In the following description, unless otherwise specified, the vertical, longitudinal, and horizontal directions shown by arrows in FIG. 2 are defined as the vertical, longitudinal, and horizontal directions of the emergency lighting device A1.

The emergency lighting fixture A1 includes a lighting device 1 according to the embodiment (hereinafter abbreviated as the lighting device 1), a vessel body A10, a light source unit A11, a display block A12, a battery unit B1, etc. (see FIGS. 2 and 4). (See 3).

The container body A10 is made of a synthetic resin material and has a rectangular box shape with an opening on the front surface (see FIG. 3). The container body A10 accommodates the lighting device 1, the battery unit B1, the terminal block 90, the mounting plate 91, and the like.

The mounting plate 91 is formed into a plate shape from a metal material (see FIG. 3). The mounting plate 91 is screwed to the inner bottom surface of the container body A10. The lighting device 1 and the terminal block 90 are screwed to a mounting plate 91 and housed in the housing A10. Further, the lighting device 1 and the terminal block 90 are electrically connected. The terminal block 90 is electrically connected to a power line drawn in from a power hole 96 (see FIG. 3) provided on the bottom surface of the container body A10. That is, the lighting device 1 is electrically connected to the commercial AC power source P1 through the terminal block 90 and the power line.

The battery unit B1 is detachably attached to the attachment plate 91. Note that the battery unit B1 is electrically connected to the lighting device 1 while being attached to the mounting plate 91.

The display block A12 includes a display panel 92, a light guide plate 93, and a holder 94 (see FIG. 3).

The display panel 92 is formed into a rectangular flat plate shape using a transparent synthetic resin material such as acrylic resin or polycarbonate resin. However, the display panel 92 may be formed of a translucent material other than synthetic resin, such as quartz glass. A pictogram 921 for evacuation guidance is displayed on the front surface (display surface 920) of the display panel 92 (see FIG. 2).

The light guide plate 93 is formed into a rectangular flat plate shape using a transparent synthetic resin material such as acrylic resin or polycarbonate resin. The light guide plate 93 is arranged behind the display panel 92 so that its front surface faces the rear surface of the display panel 92 (see FIG. 3). Light emitted from the light source unit A11 is incident on the upper surface (incidence surface 930) of the light guide plate 93. Light entering from the entrance surface 930 is guided through the light guide plate 93 and exits from the front surface of the light guide plate 93. Then, the display panel 92 is illuminated by the light emitted from the output surface of the light guide plate 93.

The holder 94 is made of a non-transparent synthetic resin material and is formed into a rectangular box shape (frame shape) with an open front and top surface. The holder 94 holds the display panel 92 and the light guide plate 93 so that the display panel 92 is placed in front of the light guide plate 93 (see FIG. 3).

The display block A12 is attached to the container body A10 so as to cover the remaining part of the opening of the container body A10 except for the upper part where the light source unit A11 is attached (see FIG. 2).

The light source unit A11 includes an LED 2 (see FIG. 1) serving as a light source, a light guide that guides light emitted from the LED 2, and a housing 95 that houses the LED 2 and the light guide. (See Figure 3).

The housing 95 is formed into a long box shape with an open bottom and rear surface. The LED 2 is mounted on a board and housed in one end (right end) of the housing 95 in the longitudinal direction. The light guide is formed in a long prismatic shape, with one end surface (right end surface) in the longitudinal direction facing the LED 2, and the side surface (lower surface) along the longitudinal direction facing the opening in the lower surface of the housing 95. It is housed in the casing 95 in a facing state. Note that a part of the board on which the LED 2 is mounted (hereinafter referred to as a protruding piece 97) protrudes from the rear surface of the housing 95 (see FIG. 3).

The light source unit A11 is attached to the container body A10 so as to be fitted into the upper front surface of the container body A10. At this time, by inserting and connecting the protruding piece 97 to the connector 98 installed at the upper right corner of the device body A10, the light source unit A11 (LED2) and the lighting device 1 are connected via the connector 98 and the electric wire (not shown). electrically connected.

Thus, in a state where the light source unit A11 is attached to the vessel body A10, the entrance surface 930 of the light guide plate 93 and the exit port of the light source unit A11 face each other in the vertical direction. Therefore, almost all of the light emitted from the exit of the light source unit A11 enters the light guide plate 93 from the incident surface 930 of the light guide plate 93. The light incident on the light guide plate 93 is totally reflected at the rear surface of the holder 94 while traveling through the light guide plate 93 and can be emitted forward from the output surface of the light guide plate 93 to illuminate the display panel 92 .

(3) Details of the lighting device according to the embodiment Next, the lighting device 1 will be described in detail with reference to the block diagram of FIG.

The lighting device 1 includes a regular lighting circuit 10, an emergency lighting circuit 11, a charging circuit 12, a power outage detection circuit 13, a control circuit 14, a control power supply circuit 15, a dummy load circuit 16, and the like. Further, the lighting device 1 further includes a rectifier circuit 40, an input capacitor 41, diodes D1 to D4, a check switch SW1, and the like.

The lighting device 1 uses the commercial AC power supply P1 as a regular power supply, the battery unit B1 as an emergency power supply, and uses the regular power supplied from the commercial AC power supply P1 and the emergency power supplied from the battery unit B1. , lights up LED2. Further, the lighting device 1 charges the battery unit B1 using common power supplied from the commercial AC power source P1.

(3.1) Rectifier circuit, input capacitor The rectifier circuit 40 is a diode bridge. The rectifier circuit 40 performs full-wave rectification on an AC voltage Vac (for example, a sine wave voltage with a frequency of 50 Hz or 60 Hz and an effective value of 100 V or 200 V) input from the commercial AC power supply P1. The pulsating voltage output from the rectifier circuit 40 is smoothed by an input capacitor 41 made of an electrolytic capacitor. Then, the DC voltage smoothed by the input capacitor 41 is input to the regular lighting circuit 10.

(3.2) Regular lighting circuit The regular lighting circuit 10 lights the LED 2 using the regular power supplied from the commercial AC power source P1. In this embodiment, the regular power is supplied to the regular lighting circuit 10 from the commercial AC power supply P1 via the rectifier circuit 40 and the input capacitor 41.

The regular lighting circuit 10 has a so-called isolated flyback converter including a transformer T1, a switching element Q1, a diode D1, a smoothing capacitor C1, and a converter control section 10a. The regular lighting circuit 10 further includes an output adjustment circuit 10b.

The first end of the primary winding N1 of the transformer T1 is electrically connected to the high potential side terminal of the input capacitor 41, and the second end of the primary winding N1 is electrically connected to the drain terminal of the switching element Q1. be done. Switching element Q1 is an N-channel field effect transistor. The source terminal of switching element Q1 is electrically connected to the low potential side terminal of input capacitor 41. Further, a gate terminal of switching element Q1 is electrically connected to converter control section 10a.

The first end of the secondary winding N2 of the transformer T1 is electrically connected to the anode of the diode D1, and the second end of the secondary winding N2 is electrically connected to the low potential side terminal of the smoothing capacitor C1. . Further, the high potential side terminal of the smoothing capacitor C1 and the cathode of the diode D1 are electrically connected. Furthermore, the high potential side terminal of the smoothing capacitor C1 is electrically connected to the anode of the LED 2 via the output adjustment circuit 10b. Moreover, the low potential side terminal of the smoothing capacitor C1 is electrically connected to the cathode of the LED2.

Converter control section 10a is composed of an integrated circuit. The converter control unit 10a performs PWM (pulse width modulation) control on the switching element Q1 so that the lighting current Io, which is the current flowing through the LED 2, matches the first target value. The converter control unit 10a lights up the LED 2 by making the lighting current Io match the first target value. Furthermore, converter control section 10a controls output adjustment circuit 10b. Note that converter control section 10a and switching element Q1 may be configured as one integrated circuit.

In this embodiment, the output adjustment circuit 10b detects the magnitude of the lighting current Io, and outputs a feedback signal Y1 including the detection result of the lighting current Io to the converter control unit 10a. By receiving the feedback signal Y1, the converter control unit 10a can monitor the magnitude of the lighting current Io and perform feedback control of the lighting current Io. Note that the lighting device 1 may include a current detection circuit that detects the lighting current Io separately from the output adjustment circuit 10b. The current detection circuit is preferably configured to include a resistor that is connected in series with the LED 2 and through which the lighting current Io flows. Further, it is preferable that the converter control unit 10a receives the feedback signal Y1 via a photocoupler.

The regular lighting circuit 10 receives the voltage across the input capacitor 41 and performs PWM control on the switching element Q1 as described above, thereby generating a DC intermediate voltage Vi in the smoothing capacitor C1. That is, the intermediate voltage Vi is a voltage generated by common power.

Output adjustment circuit 10b includes a switch element and the like controlled by converter control section 10a. The switch element of the output adjustment circuit 10b is electrically connected between the high potential side terminal of the smoothing capacitor C1 and the anode of the LED2. That is, the switch element of the output adjustment circuit 10b is inserted into the power supply path that electrically connects the smoothing capacitor C1 and the LED 2, and the output adjustment circuit 10b switches the power supply path into a conductive state and a cutoff state. It can be switched selectively. Therefore, when the switch element of the output adjustment circuit 10b is on, the lighting current Io is supplied to the LED2 by the intermediate voltage Vi of the smoothing capacitor C1, and the LED2 is turned on. On the other hand, when the switch element of the output adjustment circuit 10b is off, the lighting current Io supplied from the smoothing capacitor C1 to the LED2 is cut off, and the LED2 is turned off. Note that the switch element is preferably a transistor such as a field effect transistor or a bipolar transistor.

Further, the output adjustment circuit 10b detects the magnitude of the lighting current Io, and outputs a feedback signal Y1 including the detection result of the lighting current Io to the converter control unit 10a.

(3.3) Charging Circuit The charging circuit 12 charges the battery unit B1 with common power.

Specifically, the charging circuit 12 is a switching power supply that inputs the intermediate voltage Vi of the smoothing capacitor C1 and supplies a charging current Ic to the battery unit B1. The charging current Ic is supplied to the battery unit B1 via a diode D2 for preventing backflow. The charging circuit 12 then charges the battery unit B1 by controlling the charging current Ic while monitoring the battery voltage Vb that is the voltage of the battery unit B1.

If the charging circuit 12 does not receive the charging stop signal Y4 from the control circuit 14 (if the charging stop signal Y4 is at L level), it performs the charging operation and supplies the charging current Ic to the battery unit B1 using the intermediate voltage Vi. supply Furthermore, if the charging circuit 12 receives the charging stop signal Y4 from the control circuit 14 (if the charging stop signal Y4 is at H level), it stops the charging operation and does not supply the charging current Ic to the battery unit B1.

(3.4) Power outage detection circuit The power outage detection circuit 13 detects a power outage in the commercial AC power supply P1 when the intermediate voltage Vi, which is a voltage generated by commercial power, becomes less than the threshold value Vt (see FIG. 5). .

Specifically, the power failure detection circuit 13 is composed of a Zener diode, a resistor, and the like. Then, if the intermediate voltage Vi is equal to or higher than the threshold value Vt, the power outage detection circuit 13 determines that the commercial AC power source P1 is energized and there is no power outage. The power outage detection circuit 13 determines that the commercial AC power supply P1 is out of power if the intermediate voltage Vi is less than the threshold value Vt. The power outage detection circuit 13 generates a power outage detection signal Y2 based on the determination result of a power outage, and outputs the power outage detection signal Y2 to the control circuit 14. The control circuit 14 can recognize whether or not there is a power outage in the commercial AC power supply P1 based on the power outage detection signal Y2.

(3.5) Emergency lighting circuit The emergency lighting circuit 11 lights up the LED 2 with emergency power supplied from the battery unit B1. In this embodiment, emergency power is supplied to the emergency lighting circuit 11 from the battery unit B1.

Specifically, the emergency lighting circuit 11 has a flyback converter including a transformer and a switching element, and outputs the boosted or stepped down battery voltage Vb of the battery unit B1. A high potential side output terminal of the emergency lighting circuit 11 is electrically connected to the anode of the LED 2, and a low potential side output terminal of the emergency lighting circuit 11 is electrically connected to the cathode of the LED 2. Then, the emergency lighting circuit 11 controls the output so that the lighting current Io, which is the current flowing through the LED 2, matches the second target value. The emergency lighting circuit 11 lights up the LED 2 by making the lighting current Io match the second target value. However, the second target value of the emergency lighting circuit 11 is a value smaller than the first target value of the regular lighting circuit 10.

Further, when the emergency lighting circuit 11 is operating (stepping up or stepping down the battery voltage Vb), the emergency lighting circuit 11 supplies the auxiliary voltage Vg to supply power to the control power supply circuit 15 using emergency power. generate. A diode D4 for preventing backflow is electrically connected between the emergency lighting circuit 11 and the control power supply circuit 15, and the auxiliary voltage Vg is input to the control power supply circuit 15 via the diode D4.

Note that the emergency lighting circuit 11 may include a forward converter instead of the flyback converter.

(3.6) Control Power Supply Circuit The control power supply circuit 15 generates a control voltage Vc for operating the control circuit 14.

Specifically, the control power supply circuit 15 includes a step-down series regulator. A diode D3 for backflow prevention is electrically connected between the high potential side terminal of the smoothing capacitor C1 and the high potential side input terminal of the control power supply circuit 15, and the intermediate voltage Vi is applied via the diode D3. and is input to the control power supply circuit 15. In addition, a diode D4 for backflow prevention is electrically connected between the emergency lighting circuit 11 and the control power supply circuit 15, and the auxiliary voltage Vg generated by the emergency lighting circuit 11 is passed through the diode D4. It is input to the control power supply circuit 15. That is, a voltage with a higher voltage value between the intermediate voltage Vi and the auxiliary voltage Vg is inputted to the control power supply circuit 15 as the control input voltage Vr by an OR circuit formed of diodes D3 and D4. The control power supply circuit 15 uses the intermediate voltage Vi or the auxiliary voltage Vg as the control input voltage Vr, generates the control voltage Vc from the control input voltage Vr, and outputs the control voltage Vc to the control circuit 14.

(3.7) Dummy load circuit The dummy load circuit 16 is electrically connected between both ends of the smoothing capacitor C1, is applied with an intermediate voltage Vi, and is in a conductive state in which a dummy current Id generated by the intermediate voltage Vi flows. and a cutoff state in which the dummy current Id is cut off.

FIG. 4 shows an example of the configuration of the dummy load circuit 16. The dummy load circuit 16 shown in FIG. 4 includes a series circuit of a resistance element R10 and a switch element Q10. Switch element Q10 in FIG. 4 is an N-channel field effect transistor, but switch element Q10 may also be a bipolar transistor. A first end of resistance element R10 is electrically connected to the high potential side terminal of smoothing capacitor C1, and a second end of resistance element R10 is electrically connected to the drain terminal of switch element Q10. The source terminal of the switching element Q10 is electrically connected to the low potential side terminal of the smoothing capacitor C1. That is, the intermediate voltage Vi is applied to both ends of the series circuit of the resistance element R10 and the switch element Q10.

The gate terminal of the switch element Q10 is electrically connected to the control circuit 14, and the switch element Q10 is switched on and off by the discharge signal Ya output from the control circuit 14. Then, when the control circuit 14 turns on the switch element Q10, the dummy load circuit 16 becomes conductive. Furthermore, when the control circuit 14 turns off the switch element Q10, the dummy load circuit 16 is placed in a cut-off state. Specifically, switch element Q10 is turned on when discharge signal Ya is at H level, and turned off when discharge signal Ya is at L level. When the switch element Q10 is on, a dummy current Id based on the intermediate voltage Vi flows through the series circuit of the resistance element R10 and the switch element Q10. If switch element Q10 is in the off state, dummy current Id is cut off.

(3.8) Inspection Switch The inspection switch SW1 has an operation part that can be operated by a person, and the person operates the inspection switch SW1 when inspecting the emergency lighting device A1 or the lighting device 1. The inspection switch SW1 outputs an inspection signal Ys to the control circuit 14 when the operating section is operated. The inspection switch SW1 has, for example, a push button switch, a toggle switch, a seesaw switch, or a touch panel as an operation section.

(3.9) Control Circuit The control circuit 14 includes a microcontroller. The control circuit 14 operates by being supplied with the control voltage Vc from the control power supply circuit 15.

The control circuit 14 receives a power outage detection signal Y2 from the power outage detection circuit 13. The control circuit 14 can recognize whether or not the commercial AC power supply P1 is out of power based on the power outage detection signal Y2. The control circuit 14 operates in a normal operation mode (regular use mode) unless the commercial AC power supply P1 is out of power. Further, the control circuit 14 operates in an emergency operation mode (emergency mode) if the commercial AC power supply P1 is out of power. Further, upon receiving the inspection signal Ys, the control circuit 14 operates in an operation mode during inspection (inspection mode).

That is, the control circuit 14 controls the regular lighting circuit 10, the emergency lighting circuit 11, and the charging circuit 12. When the power outage detection circuit 13 detects a power outage, the control circuit 14 stops the charging circuit 12 and operates the emergency lighting circuit 11. Further, upon receiving the inspection signal Ys, the control circuit 14 stops the regular lighting circuit 10 and the charging circuit 12, and operates the emergency lighting circuit 11.

(3.9.1) Regular mode In the regular mode, the control circuit 14 can switch the LED 2 between always on and always off.

For the constant lighting of the LED 2, the control circuit 14 instructs the converter control unit 10a to switch the output adjustment circuit 10b to a conductive state (the switch element of the output adjustment circuit 10b is turned on), and to operate the regular lighting circuit 10. Then, LED2 is turned on all the time. That is, in constant lighting, common power is stored in the smoothing capacitor C1, and the lighting current Io is supplied to the LED 2 by the intermediate voltage Vi.

When the LED 2 is always turned off, the control circuit 14 instructs the converter control unit 10a to switch the output adjustment circuit 10b to a cutoff state (turn off the switch element of the output adjustment circuit 10b) and stop the regular lighting circuit 10. Then, LED2 is turned off all the time. That is, when the lights are always off, the common power is stored in the smoothing capacitor C1, but the lighting current Io is not supplied to the LED2.

Note that "the regular lighting circuit 10 operates" means that the output adjustment circuit 10b is in a conductive state and the lighting current Io is supplied by the intermediate voltage Vi (common power). "The regular lighting circuit 10 is stopped" means that the output adjustment circuit 10b is in a cut-off state and the lighting current Io is not supplied by the intermediate voltage Vi (common power).

Further, in the regular mode, the control circuit 14 does not output the emergency lighting signal Y3 to the emergency lighting circuit 11 (maintains the emergency lighting signal Y3 at L level), and maintains the emergency lighting circuit 11 in a stopped state.

Further, in the regular mode, the control circuit 14 operates the charging circuit 12 without outputting the charging stop signal Y4 (maintaining the charging stop signal Y4 at L level).

In the regular mode, the LED 2 is always turned on or off by the regular lighting circuit 10, and the battery unit B1 is charged by the charging circuit 12.

Further, in the regular mode, the control circuit 14 does not output the discharge signal Ya to the dummy load circuit 16 during the constant lighting (maintains the discharge signal Ya at L level), and maintains the dummy load circuit 16 in a cut-off state. In the normal mode, the control circuit 14 outputs the discharge signal Ya to the dummy load circuit 16 (maintains the discharge signal Ya at H level) when the light is always turned off, and maintains the dummy load circuit 16 in a conductive state.

In the normal use mode, the intermediate voltage Vi is generated by operating the flyback converter of the normal lighting circuit 10, so the control power supply circuit 15 uses the intermediate voltage Vi as the control input voltage Vr to generate the control voltage Vc, and performs control. The circuit 14 becomes operational.

(3.9.2) Emergency mode In the emergency mode, the control circuit 14 instructs the converter control unit 10a to switch the output adjustment circuit 10b to a cutoff state (the switch element of the output adjustment circuit 10b is turned off), and The lighting circuit 10 is stopped. Note that "the regular lighting circuit 10 is stopped" means that the output adjustment circuit 10b is in a cutoff state and the lighting current Io is not supplied by the intermediate voltage Vi (common power).

Further, in the emergency mode, the control circuit 14 outputs the emergency lighting signal Y3 to the emergency lighting circuit 11 (maintains the emergency lighting signal Y3 at H level). The emergency lighting circuit 11 operates if the emergency lighting signal Y3 is at H level. When the emergency lighting circuit 11 operates, the emergency power of the battery unit B1 is supplied to the LED 2 through the emergency lighting circuit 11, and the LED 2 is turned on. Thus, the emergency lighting circuit 11 lights up the LED 2 (emergency lighting).

When the emergency lighting circuit 11 operates, the emergency power of the battery unit B1 is supplied to the control power supply circuit 15 through the emergency lighting circuit 11, and the control power supply circuit 15 generates the control voltage Vc from the auxiliary voltage Vg, and the control circuit 14 becomes operational. That is, when the power outage detection circuit 13 detects a power outage, the control power supply circuit 15 generates the control voltage Vc from the emergency power.

Furthermore, in the emergency mode, the control circuit 14 does not output the discharge signal Ya to the dummy load circuit 16 (maintains the discharge signal Ya at L level), and maintains the dummy load circuit 16 in a cut-off state.

In addition, when the commercial AC power supply P1 is out of power, the supply of charge to the smoothing capacitor C1 by the commercial power is stopped, so the intermediate voltage Vi gradually decreases, and the intermediate voltage Vi becomes the lower limit of the operating voltage of the charging circuit 12 (operating (lower limit value), the charging circuit 12 stops operating and the charging current Ic stops flowing to the battery unit B1.

(3.9.3) Inspection mode Inspection is performed when the commercial AC power supply P1 is energized. In the inspection mode, the control circuit 14 instructs the converter control unit 10a to switch the output adjustment circuit 10b to a cutoff state (the switch element of the output adjustment circuit 10b is turned off), and to stop the regular lighting circuit 10.

Further, in the inspection mode, the control circuit 14 outputs the emergency lighting signal Y3 to the emergency lighting circuit 11 (maintains the emergency lighting signal Y3 at H level). The emergency lighting circuit 11 operates if the emergency lighting signal Y3 is at H level. When the emergency lighting circuit 11 operates, the emergency power of the battery unit B1 is supplied to the LED 2 through the emergency lighting circuit 11, and the LED 2 is turned on. Then, the emergency lighting circuit 11 lights up the LED 2 (inspection lighting).

In the inspection mode, the control power supply circuit 15 sets the voltage with a higher voltage value among the intermediate voltage Vi and the auxiliary voltage Vg as the control input voltage Vr, and outputs the control voltage Vc generated from the control input voltage Vr to the control circuit 14. In this embodiment, the intermediate voltage Vi is higher than the auxiliary voltage Vg. Therefore, in the inspection mode, the control power supply circuit 15 generates the control voltage Vc from the intermediate voltage Vi, and the control circuit 14 becomes operable. That is, the control power supply circuit 15 generates the control voltage Vc from the common power in the inspection mode.

Further, in the inspection mode, the control circuit 14 outputs the discharge signal Ya to the dummy load circuit 16 (maintains the discharge signal Ya at H level), and maintains the dummy load circuit 16 in a conductive state.

Further, in the inspection mode, the control circuit 14 outputs the charge stop signal Y4 (maintains the charge stop signal Y4 at H level), and causes the charging circuit 12 to stop charging the battery unit B1.

That is, upon receiving the inspection signal Ys, the lighting device 1 stops the charging operation of the charging circuit 12 and lights up the LED 2 using the emergency power of the battery unit B1. Note that the inspections include periodic inspections that are carried out at intervals determined by law, and user inspections that are carried out by users.

(3.10) Operation when the commercial AC power source P1 loses power during inspection The following describes in detail the operation when the commercial AC power source P1 loses power during inspection.

(3.10.1) Comparative Example FIG. 6 shows a block configuration of a lighting device 100 as a comparative example. The lighting device 100 differs from the lighting device 1 in that it does not include a dummy load circuit 16. Note that, regarding the lighting device 100, the same components as the lighting device 1 of the present embodiment shown in FIG.

FIG. 7 shows voltage waveforms, current waveforms, and signal waveforms of each part of the lighting device 100 before and after a power outage occurs in the commercial AC power source P1 while the control circuit 14 is operating in the inspection mode. FIG. 7 shows, in order from the top, the waveforms of AC voltage Vac, intermediate voltage Vi, power outage detection signal Y2, inspection signal Ys, charging stop signal Y4, emergency lighting signal Y3, charging current Ic, emergency voltage Ve, and auxiliary voltage Vg. shows.

First, the commercial AC power supply P1 is in an energized state, the intermediate voltage Vi has a voltage value V10 (>0), and the control circuit 14 is operating in the normal mode.

Then, at time t11, when the inspection switch SW1 is operated and the inspection signal Ys is generated, the control circuit 14 starts operating in the inspection mode. When the control circuit 14 starts operating in the inspection mode, it causes the emergency lighting signal Y3 to transition from the L level to the H level, and causes the charging stop signal Y4 to transition from the L level to the H level. When the charging circuit 12 receives the H-level charging stop signal Y4, it stops operating, and the charging current Ic decreases to zero. The emergency lighting circuit 11 starts operating after a delay time Td has elapsed after receiving the H-level emergency lighting signal Y3. When the emergency lighting circuit 11 starts operating, the emergency voltage Ve and the auxiliary voltage Vg gradually increase and reach the steady value Ve1 and the steady value Vg1, respectively. In the inspection mode, the LED 2 is turned on (inspection lighting) by the emergency voltage Ve, and the control power supply circuit 15 generates the control voltage Vc from the intermediate voltage Vi.

When the control circuit 14 is operating in the inspection mode, when the commercial AC power supply P1 has a power outage at time t12, the supply of charge to the smoothing capacitor C1 by the commercial power is stopped, and after time t12, the intermediate voltage Vi gradually decreases. do. Then, when the intermediate voltage Vi decreases from the voltage value V10 to the threshold value Vt at time t13, the power outage detection circuit 13 detects a power outage of the commercial AC power supply P1 and causes the power outage detection signal Y2 to transition from the L level to the H level. When the control circuit 14 receives the H-level power failure detection signal Y2, it starts operating in the emergency mode. At this time, the detection time required from when a power outage occurs at time t12 until the power outage detection circuit 13 detects a power outage at time t13 is ts10.

On the other hand, FIG. 8 shows the voltage waveform, current waveform, and signal waveform of each part of the lighting device 100 before and after a power outage occurs in the commercial AC power source P1 while the control circuit 14 is operating in the normal use mode. FIG. 8 shows the waveforms of AC voltage Vac, intermediate voltage Vi, power failure detection signal Y2, emergency lighting signal Y3, charging current Ic, emergency voltage Ve, and auxiliary voltage Vg in order from the top. Note that the waveforms of each part shown in FIG. 8 are the same as the waveforms of each part when a power outage occurs while the control circuit 14 is operating in the regular mode in the lighting device 1 of this embodiment.

First, the commercial AC power supply P1 is in an energized state, the intermediate voltage Vi has a voltage value V10 (>0), and the control circuit 14 is operating in the normal mode.

Then, when the commercial AC power supply P1 has a power outage at time t21, the supply of charge to the smoothing capacitor C1 by the common power is stopped, and the intermediate voltage Vi gradually decreases after time t21. Then, when the intermediate voltage Vi decreases from the voltage value V10 to the threshold value Vt at time t22, the power outage detection circuit 13 detects a power outage of the commercial AC power supply P1 and causes the power outage detection signal Y2 to transition from the L level to the H level. When the control circuit 14 receives the power failure detection signal Y2 at the H level, it starts operating in the emergency mode and changes the emergency lighting signal Y3 from the L level to the H level.

Even when the control circuit 14 is operating in the emergency mode, the charging circuit 12 continues to operate, and the charging current Ic continues to flow until time t23 when the intermediate voltage Vi becomes less than the lower operating limit V20 of the charging circuit 12. After time t23, the charging circuit 12 stops operating, so the intermediate voltage Vi is not used to generate the charging current Ic. Therefore, if the slope of the decrease in the intermediate voltage Vi is defined as a voltage decrease slope, the voltage decrease slope after time t23 is smaller (gentle) than the voltage decrease slope before time t23.

As shown in FIG. 8, when a power outage occurs while the control circuit 14 is operating in the normal use mode (time t21), the charging circuit 12 causes the intermediate voltage Vi to drop to the lower operating limit value V20 of the charging circuit 12. Since it continues to operate until (time t23), the intermediate voltage Vi is used to generate the charging current Ic. Therefore, the slope of decrease in the intermediate voltage Vi after a power outage occurs when the control circuit 14 is operating in the inspection mode (see FIG. 7) is different from the slope of the decrease in the intermediate voltage Vi after a power outage occurs when the control circuit 14 is operating in the normal use mode. The slope of the decrease in the intermediate voltage Vi (see FIG. 8) is smaller (slower) than the slope of the decrease in the intermediate voltage Vi after the change. As a result, in FIG. 8, if the detection time required from the occurrence of a power outage at time t21 until the power outage detection circuit 13 detects a power outage at time t22 is ts20, then the detection time ts10 in FIG. 7 is longer than the detection time ts20. become longer.

That is, in the lighting device 100, if the commercial AC power supply P1 has a power outage during an inspection, the time required to detect the power outage will increase compared to when the commercial AC power supply P1 has a power outage while the inspection is not in progress. For example, if the lighting device 100 includes a display unit that notifies the user of information such as inspections and power outages, there is a possibility that the user will be notified of incorrect information or that the user will have a misunderstanding such as a malfunction.

(3.10.2) This embodiment Therefore, the lighting device 1 of this embodiment operates as follows.

FIG. 5 shows the voltage waveform, current waveform, and signal waveform of each part of the lighting device 1 before and after a power outage occurs in the commercial AC power source P1 while the control circuit 14 is operating in the inspection mode. FIG. 5 shows, in order from the top, AC voltage Vac, intermediate voltage Vi, power outage detection signal Y2, inspection signal Ys, charging stop signal Y4, discharge signal Ya, emergency lighting signal Y3, charging current Ic, dummy current Id, and emergency voltage. The waveforms of Ve and auxiliary voltage Vg are shown.

First, the commercial AC power supply P1 is in an energized state, the intermediate voltage Vi has a voltage value V10 (>0), and the control circuit 14 is operating in the normal mode.

Then, at time t1, when the inspection switch SW1 is operated and the inspection signal Ys is generated, the control circuit 14 starts operating in the inspection mode. When the control circuit 14 starts operating in the inspection mode, it causes the emergency lighting signal Y3 to transition from the L level to the H level, and causes the charging stop signal Y4 to transition from the L level to the H level. When the charging circuit 12 receives the H-level charging stop signal Y4, it stops operating, and the charging current Ic decreases to zero. The emergency lighting circuit 11 starts operating after a delay time Td has elapsed after receiving the H-level emergency lighting signal Y3. When the emergency lighting circuit 11 starts operating, the emergency voltage Ve and the auxiliary voltage Vg gradually increase and reach the steady value Ve1 and the steady value Vg1, respectively. When the control circuit 14 starts operating in the inspection mode, the control circuit 14 instructs the converter control unit 10a to switch the output adjustment circuit 10b to a cutoff state (the switch element of the output adjustment circuit 10b is turned off), and switches the normal lighting circuit Stop 10. That is, when the control circuit 14 is operating in the inspection mode, each operation of the charging circuit 12 and the regular lighting circuit 10 is stopped.

Furthermore, in the lighting device 1 of this embodiment, when the control circuit 14 starts operating in the inspection mode, the control circuit 14 changes the discharge signal Ya from the L level to the H level (outputs the discharge signal Ya to the dummy load circuit 16). In the dummy load circuit 16, the switch element Q10 (see FIG. 4) is turned on by the H-level discharge signal Ya, and the intermediate voltage Vi of the smoothing capacitor C1 turns on the dummy load circuit (see FIG. 4). Current Id flows.

When the control circuit 14 is operating in the inspection mode, when the commercial AC power supply P1 has a power outage at time t2, the supply of charge to the smoothing capacitor C1 by the commercial power is stopped, and after time t2, the intermediate voltage Vi gradually decreases. do. Even after time t2, the discharge signal Ya maintains the H level, and the dummy load circuit 16 is conductive. Since the dummy load circuit 16 is conductive, the smoothing capacitor C1 is discharged via the dummy load circuit 16, and the rate of decrease of the intermediate voltage Vi is the same as when the dummy load circuit 16 is cut off (corresponding to the comparative example). It's faster in comparison. The resistance element is adjusted such that the voltage drop slope of the intermediate voltage Vi from time t2 to time t3 is approximately the same as or greater than the voltage drop slope of the intermediate voltage Vi after the power failure occurs at time t21 shown in FIG. The resistance value of R10 is set in advance.

Then, when the intermediate voltage Vi decreases from the voltage value V10 to the threshold value Vt at time t3, the power outage detection circuit 13 detects a power outage of the commercial AC power supply P1 and causes the power outage detection signal Y2 to transition from the L level to the H level. When the control circuit 14 receives the H-level power failure detection signal Y2, it starts operating in the emergency mode. At this time, the detection time required from the occurrence of a power outage until the power outage detection circuit 13 detects the power outage is ts1.

When the control circuit 14 starts operating in the emergency mode, it transitions the discharge signal Ya from the H level to the L level (stops outputting the discharge signal Ya), and switches the dummy load circuit 16 from a conductive state to a cutoff state. Note that the voltage drop slope of the intermediate voltage Vi after time t3 is smaller (gentle) than the voltage drop slope of the intermediate voltage Vi from time t2 to time t3.

In the lighting device 1 of this embodiment, when the control circuit 14 is operating in the inspection mode, each operation of the charging circuit 12 and the regular lighting circuit 10 is stopped. However, when the operations of the charging circuit 12 and the regular lighting circuit 10 are stopped during inspection, the dummy load circuit 16 is conductive, and a dummy current Id based on the intermediate voltage Vi flows through the dummy load circuit 16. As a result, even if a power outage occurs during inspection, the detection time ts1 required from the time the power outage occurs until the intermediate voltage Vi drops to the threshold value Vt is approximately the same as the detection time ts20 in FIG. The detection time is shorter than the detection time ts20. Therefore, the lighting device 1 can suppress an increase in the time required to detect a power outage even if the commercial AC power source P1 has a power outage during inspection.

Further, when the control circuit 14 operates in the regular use mode and constantly turns off the LED 2, the charging circuit 12 is operating, but the operation of the regular lighting circuit 10 is stopped. Even when the LED 2 is constantly turned off, the control circuit 14 outputs the discharge signal Ya to the dummy load circuit 16 (maintains the discharge signal Ya at H level), and maintains the dummy load circuit 16 in a conductive state. Therefore, when the LED 2 is always off, the dummy load circuit 16 is conductive, and a dummy current Id based on the intermediate voltage Vi flows through the dummy load circuit 16. As a result, even if a power outage occurs while the lights are off, the detection time required from the time the power outage occurs until the intermediate voltage Vi drops to the threshold value Vt is approximately the same as the detection time ts20 in FIG. The detection time is shorter than the detection time ts20. Therefore, the lighting device 1 can suppress an increase in the time required to detect a power outage even if the commercial AC power source P1 has a power outage while the lighting device 1 is always turned off.

(4) First Modified Example FIG. 9 shows a block configuration of a lighting device 1A of a first modified example.

In the lighting device 1A, the emergency lighting signal Y3 of the control circuit 14 also serves as the discharge signal Ya (see FIG. 1) of the lighting device 1. That is, the dummy load circuit 16 becomes conductive upon receiving the H-level emergency lighting signal Y3.

In the first modification, the control circuit 14 operates in the inspection mode upon receiving the inspection signal Ys. The control circuit 14 operating in the inspection mode outputs the emergency lighting signal Y3 to the emergency lighting circuit 11 (maintains the emergency lighting signal Y3 at H level). When the emergency lighting circuit 11 receives the emergency lighting signal Y3 at the H level (if the emergency lighting signal Y3 is at the H level), the emergency lighting circuit 11 starts operating. Further, the control circuit 14 instructs the converter control unit 10a to switch the output adjustment circuit 10b to the cutoff state and stop the regular lighting circuit 10.

Further, in the first modification, the control circuit 14 operates in an emergency mode when the power outage detection circuit 13 detects a power outage. The control circuit 14 operating in the emergency mode outputs a charging stop signal Y4 to the charging circuit 12 (maintaining the charging stop signal Y4 at H level), and outputs an emergency lighting signal Y3 to the emergency lighting circuit 11 (emergency lighting (maintains signal Y3 at H level). When the charging circuit 12 receives the charging stop signal Y4 (if the charging stop signal Y4 is at H level), it stops the operation of the charging circuit 12. When the emergency lighting circuit 11 receives the emergency lighting signal Y3 at the H level (if the emergency lighting signal Y3 is at the H level), the emergency lighting circuit 11 starts operating. Further, the control circuit 14 instructs the converter control unit 10a to switch the output adjustment circuit 10b to the cutoff state and stop the regular lighting circuit 10.

Then, the control circuit 14 switches the dummy load circuit 16 from the cutoff state to the conduction state when the emergency lighting signal Y3 is generated (when the emergency lighting signal Y3 is at H level). That is, in the first modification, when the control circuit 14 is operating in the inspection mode or the emergency mode, the dummy load circuit 16 becomes conductive.

Therefore, also in the first modification, when each operation of the charging circuit 12 and the regular lighting circuit 10 is stopped, the dummy load circuit 16 is conductive, and the dummy current Id due to the intermediate voltage Vi flows through the dummy load circuit 16. . As a result, the lighting device 1A can suppress an increase in the time required to detect a power outage even if the commercial AC power source P1 has a power outage during inspection.

(5) Second Modification In the above-described embodiment and first modification, the regular lighting circuit 10 and the emergency lighting circuit 11 light the same LED 2. However, the regular lighting circuit 10 and the emergency lighting circuit 11 may light different light sources. That is, the lighting device may include a regular LED that is turned on when the commercial AC power source P1 is energized, and an emergency LED that is turned on when the commercial AC power source P1 is turned on.

In the embodiment and the first modification described above, when either the charging circuit 12 or the regular lighting circuit 10 is not operating, the dummy load circuit 16 is conductive, and the dummy current Id due to the intermediate voltage Vi is dummy. It may also flow through the load circuit 16.

The emergency lighting fixture A1 is not limited to a disaster prevention lighting fixture. The emergency lighting fixture A1 may be any lighting fixture that is supplied with emergency power from the battery unit B1 and turns on the light source. The emergency lighting fixture A1 may be a lighting fixture for emitting illumination light to adjust the illuminance of a space, for example.

Preferably, control circuit 14 comprises a computer system. A computer system mainly consists of a processor and a memory as hardware. At least part of the function of the control circuit 14 in the present disclosure is realized by the processor executing a program recorded in the memory of the computer system. The program may be pre-recorded in the memory of the computer system, provided through a telecommunications line, or recorded on a non-transitory storage medium readable by the computer system, such as a memory card, optical disc, or hard disk drive. may be provided. A processor of a computer system is composed of one or more electronic circuits including a semiconductor integrated circuit (IC) or a large-scale integrated circuit (LSI). The integrated circuits such as IC or LSI referred to herein have different names depending on the degree of integration, and include integrated circuits called system LSI, VLSI (Very Large Scale Integration), or ULSI (Ultra Large Scale Integration). Furthermore, an FPGA (Field-Programmable Gate Array), which is programmed after the LSI is manufactured, or a logic device that can reconfigure the connections inside the LSI or reconfigure the circuit sections inside the LSI, may also be used as a processor. I can do it. The plurality of electronic circuits may be integrated into one chip, or may be provided in a distributed manner over a plurality of chips. A plurality of chips may be integrated into one device, or may be distributed and provided in a plurality of devices. A computer system herein includes a microcontroller having one or more processors and one or more memories. Therefore, the microcontroller is also composed of one or more electronic circuits including a semiconductor integrated circuit or a large-scale integrated circuit.

The light source is not limited to LEDs, and may be other solid-state light emitting devices such as OLEDs (Organic Light Emitting Diodes).

(6) Summary As described above, the lighting device (1, 1A) of the first aspect according to the embodiment includes a regular lighting circuit (10), an emergency lighting circuit (11), and a charging circuit (12). , a power outage detection circuit (13), a dummy load circuit (16), and a control circuit (14). The regular lighting circuit (10) lights up the light source (2) with the regular power supplied from the regular power source (P1). The emergency lighting circuit (11) lights up the light source (2) with emergency power supplied from the emergency power source (B1). The charging circuit (12) charges the emergency power source (B1) with regular power. The power outage detection circuit (13) detects a power outage of the common power source (P1) when an intermediate voltage (Vi), which is a voltage generated by the common power source, becomes less than a threshold value (Vt). The dummy load circuit (16) has a conduction state where an intermediate voltage (Vi) is applied and a dummy current (Id) generated by the intermediate voltage (Vi) flows, and a cutoff state where the dummy current (Id) is cut off. Can be switched. A control circuit (14) controls a dummy load circuit (16). The control circuit (14) switches the dummy load circuit (16) from a cutoff state to a conduction state when at least one of the charging circuit (12) and the regular lighting circuit (10) stops operating.

The above-described lighting device (1, 1A) can suppress an increase in the time required to detect a power outage even if the regular power source (P1) is out of power during inspection or while the lights are always turned off.

It is preferable that the lighting device (1, 1A) of the second aspect according to the embodiment further includes a capacitor (C1) to which the intermediate voltage (Vi) is applied in the first aspect.

The above-described lighting device (1, 1A) can suppress an increase in the time required to detect a power outage even if the capacitor (C1) has a large capacity.

In the lighting device (1, 1A) of the third aspect according to the embodiment, in the first or second aspect, the control circuit (14) includes a regular lighting circuit (10), an emergency lighting circuit (11), and Preferably, the charging circuit (12) is further controlled. When the power outage detection circuit (13) detects a power outage, the control circuit (14) stops the charging circuit (12) and operates the emergency lighting circuit (11). When the control circuit (14) receives the inspection signal (Ys), it stops the regular lighting circuit (10) and the charging circuit (12), and operates the emergency lighting circuit (11).

The above-described lighting device (1, 1A) can suppress an increase in the time required to detect a power outage even if the regular power source (P1) is out of power during inspection.

In the lighting device (1A) of the fourth aspect according to the embodiment, in the third aspect, when the power outage detection circuit (13) detects a power outage, the control circuit (14) sends a charging stop signal to the charging circuit (12). (Y4) and output an emergency lighting signal (Y3) to the emergency lighting circuit (11). When the charging circuit (12) receives the charging stop signal (Y4), the charging circuit (12) stops its operation. The emergency lighting circuit (11) operates as the emergency lighting circuit (11) when receiving the emergency lighting signal (Y3). The control circuit (14) switches the dummy load circuit (16) from the cutoff state to the conduction state when the emergency lighting signal (Y3) is generated.

The lighting device (1A) described above can simplify the configuration for controlling the dummy load circuit (16).

In the lighting device (1, 1A) of the fifth aspect according to the embodiment, in any one of the first to fourth aspects, the dummy load circuit (16) includes the switching element (Q10) and the resistive element (R10). ) is preferably provided. When the control circuit (14) turns on the switch element (Q10), the dummy load circuit (16) becomes conductive. When the control circuit (14) turns off the switch element (Q10), the dummy load circuit (16) enters a cutoff state.

The above-described lighting device (1, 1A) can easily realize a dummy load circuit (16).

The emergency lighting device (A1) of the sixth aspect according to the embodiment includes the lighting device (1) according to any one of the first to fifth aspects, and a light source (2) lit by the lighting device (1). , an emergency power source (B1), a lighting device (1), a light source (2), and a container body (A10) that accommodates the emergency power source (B1).

The above-mentioned emergency lighting fixture (A1) can suppress an increase in the time required to detect a power outage even if the regular power source (P1) is out of power during inspection or while the light is always turned off.

1, 1A Lighting device 10 Regular lighting circuit 11 Emergency lighting circuit 12 Charging circuit 13 Power outage detection circuit 14 Control circuit 16 Dummy load circuit Q10 Switch element R10 Resistance element 2 LED (light source)
A1 Emergency lighting equipment A10 Body C1 Smoothing capacitor (capacitor)
P1 Commercial AC power supply (normal power supply)
B1 Battery unit (emergency power supply)
Vi Intermediate voltage Vt Threshold Id Dummy current Ys Inspection signal Y3 Emergency lighting signal Y4 Charging stop signal

Claims (6)

a regular lighting circuit that lights up a light source with regular power supplied from a regular power supply;
an emergency lighting circuit that lights up the light source with emergency power supplied from an emergency power source;
a charging circuit that charges the emergency power source with the regular power;
a power outage detection circuit that detects a power outage of the commercial power source when an intermediate voltage that is a voltage generated by the commercial power source becomes less than a threshold;
a dummy load circuit that can switch between a conduction state where the intermediate voltage is applied and a dummy current generated by the intermediate voltage flows, and a cutoff state where the dummy current is cut off;
a control circuit that controls the dummy load circuit;
The control circuit switches the dummy load circuit from the cutoff state to the conduction state when at least one of the charging circuit and the regular lighting circuit stops operating. The lighting device according to claim 1, further comprising a capacitor to which the intermediate voltage is applied. The control circuit includes:
further controlling the normal lighting circuit, the emergency lighting circuit, and the charging circuit;
When the power outage detection circuit detects the power outage, it stops the charging circuit and operates the emergency lighting circuit;
The lighting device according to claim 1 or 2, wherein upon receiving the inspection signal, the regular lighting circuit and the charging circuit are stopped and the emergency lighting circuit is activated. When the power outage detection circuit detects the power outage, the control circuit outputs a charging stop signal to the charging circuit and outputs an emergency lighting signal to the emergency lighting circuit,
The charging circuit stops operation of the charging circuit upon receiving the charging stop signal,
When the emergency lighting circuit receives the emergency lighting signal, the emergency lighting circuit performs the operation of the emergency lighting circuit,
The lighting device according to claim 3, wherein the control circuit switches the dummy load circuit from the cutoff state to the conduction state when the emergency lighting signal is generated. The dummy load circuit includes a series circuit of a switch element and a resistance element,
When the control circuit turns on the switch element, the dummy load circuit enters the conductive state,
The lighting device according to claim 1 or 2, wherein when the control circuit turns off the switch element, the dummy load circuit enters the cutoff state. The lighting device according to claim 1 or 2,
the light source lit by the lighting device;
the emergency power source;
a container housing the lighting device, the light source, and the emergency power source;
Equipped with emergency lighting equipment.

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