JP2023157708A - Lighting devices and emergency lighting equipment - Google Patents

Abstract

An object of the present invention is to reduce the possibility of over-discharging of a power storage unit.
A lighting device 1 includes a lighting circuit section 11 that lights up a light source 2 using electric power supplied from a power storage section B1, and a control section 14. The lighting circuit section 11 includes a transformer T1 and a switching element Q1. A series circuit of primary winding N11 of transformer T1 and switching element Q1 is connected to power storage unit B1. A light source 2 is connected to the secondary winding N12 of the transformer T1. The control unit 14 controls the switching operation of the switching element Q1. The lighting circuit unit 11 transmits the energy on the primary side of the transformer T1 to the secondary side by the switching operation of the switching element Q1, and lights up the light source 2 connected to the secondary winding N12 of the transformer T1. Control unit 14 turns off switching element Q1 when the voltage value of power storage unit B1 becomes equal to or less than a threshold voltage.
[Selection diagram] Figure 3

Description

The present disclosure relates to a lighting device and an emergency lighting device, and more specifically, a lighting device that lights a light source by being supplied with power from two types of power sources, a regular power source and an emergency power source, and an emergency lighting device that includes the lighting device. Regarding.

As a conventional example, a light emitting device described in Patent Document 1 is exemplified. The light emitting device described in Patent Document 1 is used for a guide light device. The casing of the guide light device incorporates a lighting device. The lighting device includes a regular lighting circuit that receives power from the AC power source and generates DC power to be supplied to the light source circuit when an AC power source such as a commercial power source is energized. The lighting device also includes an emergency lighting circuit that receives power from the storage battery and generates DC power to be supplied to the light source circuit in an emergency such as a power outage.

Japanese Patent Application Publication No. 2012-3991

In the lighting device with the above configuration, in an emergency, the emergency lighting circuit receives power from the storage battery and generates DC power to be supplied to the light source circuit, but over-discharge of the storage battery (power storage unit) may occur. There was sex.

An object of the present disclosure is to provide a lighting device and an emergency lighting fixture that can reduce the possibility of over-discharge of a power storage unit.

A lighting device according to one embodiment of the present disclosure includes a lighting circuit unit that lights a light source using electric power supplied from a power storage unit, and a control unit. The lighting circuit section includes a transformer and a switching element. A series circuit of the primary winding of the transformer and the switching element is connected to the power storage unit. The light source is connected to a secondary winding of the transformer. The control section controls a switching operation of the switching element. The lighting circuit unit transmits energy on the primary side of the transformer to the secondary side by a switching operation of the switching element, and lights the light source connected to the secondary winding of the transformer. The control section turns off the switching element when the voltage value of the power storage section becomes equal to or less than a threshold voltage.

An emergency lighting device according to one aspect of the present disclosure includes the lighting device, the light source, the power storage unit, and a container body. The container body accommodates the lighting device, the light source, and the power storage unit.

According to the present disclosure, it is possible to reduce the possibility that overdischarge of the power storage unit will occur.

FIG. 1 is an external perspective view of an emergency lighting device according to an embodiment of the present disclosure. FIG. 2 is an exploded perspective view of the emergency lighting device same as above. FIG. 3 is a circuit diagram of a lighting device according to an embodiment of the present disclosure. FIG. 4 is a timing chart for explaining the operation of the above lighting device. FIG. 5 is a timing chart for explaining the operation of the above lighting device. FIG. 6 is a circuit diagram of main parts of a lighting device according to Modification 1 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 FIG. 3 is a schematic circuit diagram of the lighting device 1 according to the embodiment.

The lighting device 1 according to the embodiment includes a lighting circuit section 11 that lights up the light source 2 with electric power supplied from the power storage section B1, and a control section 14.

The lighting circuit section 11 includes a transformer T1 and a switching element Q1. A series circuit of primary winding N11 of transformer T1 and switching element Q1 is connected to power storage unit B1. A light source 2 is connected to the secondary winding N12 of the transformer T1. The control unit 14 controls the switching operation of the switching element Q1.

The lighting circuit unit 11 transmits the energy on the primary side of the transformer T1 to the secondary side by the switching operation of the switching element Q1, and lights up the light source 2 connected to the secondary winding N12 of the transformer T1.

Control unit 14 turns off switching element Q1 when the voltage value of power storage unit B1 becomes equal to or less than a threshold voltage.

Here, "connecting" two circuit components means that the two circuit components are electrically connected, and one or more circuit components are connected between the two circuit components. Good too. The threshold voltage is set to a voltage value higher than the voltage value of power storage unit B1 when power storage unit B1 enters an overdischarge state, and is preferably set to a voltage value higher than the discharge end voltage, for example.

Furthermore, when the voltage value of power storage unit B1 becomes equal to or lower than the threshold voltage, control unit 14 turns off switching element Q1, and "turning off switching element Q1" means stopping the switching operation of switching element Q1. This means to maintain the switching element Q1 in an off state.

Control unit 14 turns off switching element Q1 when the voltage value of power storage unit B1 becomes equal to or less than a threshold voltage. When switching element Q1 is turned off, energy voltage is not transferred from the primary side to the secondary side of transformer T1, so further discharge of power storage unit B1 can be suppressed, and over-discharge of power storage unit B1 may occur. It is possible to reduce the

The lighting device 1 according to the present embodiment lights the light source 2 with the power supplied from the regular power source P1 while the regular power source P1 is energized, and in an emergency such as a power outage of the regular power source P1, the power storage unit B1 which is the emergency power source P2 It is used in the emergency lighting fixture A1 that lights up the light source 2 with the power supplied from the. The common power supply P1 is, for example, a commercial AC power supply of AC100V/200V, 50Hz/60Hz. The emergency power source P2 is a power source for supplying power to the light source 2 in an emergency such as a power outage of the regular power source P1. In the lighting device 1 according to the present embodiment, a power storage unit B1 (see FIG. 3) is used as an emergency power source P2. Further, the lighting device 1 according to the present embodiment includes a regular lighting circuit section 10 that lights up the light source 2 with the power supplied from the regular power source P1, and a regular lighting circuit section 10 that lights the light source 2 with the power supplied from the regular power source P1, and a regular lighting circuit section 10 that uses the power supplied from the power storage section B1 when the regular power source P1 has a power outage. An emergency lighting circuit section for lighting the light source 2 is provided. The lighting circuit section 11 described above is used as an emergency lighting circuit section. In the following description, the lighting circuit section 11 will be referred to as the emergency lighting circuit section 11, the transformer T1 included in the emergency lighting circuit section (lighting circuit section) 11 will be referred to as a first transformer T1, and the switching element Q1 will be referred to as a first switching element Q1. Sometimes I say.

The emergency lighting fixture A1 according to the embodiment includes the lighting device 1 according to the embodiment, a light source 2, a power storage unit B1, and a container body A10 (see FIGS. 1 and 2). The container body A10 accommodates the lighting device 1, the light source 2, and the power storage unit B1.

Since the emergency lighting fixture A1 according to the embodiment includes the lighting device 1 according to the embodiment, it is possible to provide the emergency lighting fixture A1 in which the possibility of over-discharging of the power storage unit B1 is reduced.

(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 A1 according to the embodiment is not limited to an evacuation exit guide light, but is, for example, a stairway guide light installed in a stairwell in a building, or an emergency light installed on the ceiling of a room. It doesn't matter if it's something like that. In the following description, unless otherwise specified, the vertical, longitudinal, and horizontal directions shown by arrows in FIG. 1 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 lighting device 1), a vessel body A10, a light source unit A11, a display block A12, a battery unit BU1 which is an emergency power source P2, etc. (See Figures 1 and 2).

The container body A10 is made of a synthetic resin material and is formed into a rectangular box shape having an opening on the front surface (see FIG. 2). The container body A10 accommodates the lighting device 1, the battery unit BU1, 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. 2). 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. 2) provided on the bottom of the container body A10. That is, the lighting device 1 is electrically connected to the common power source P1 (for example, a commercial AC power source) through the terminal block 90 and the power line.

Battery unit BU1 includes power storage unit B1 (see FIG. 3) having one or more storage batteries, and a case that accommodates power storage unit B1. Battery unit BU1 is detachably attached to mounting plate 91. Note that the battery unit BU1 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. 2).

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. 1).

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. 2). 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. 2).

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. 1).

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

The housing 95 is formed into a long box shape with an open bottom and rear surface. The LED 21, which is the light source 2, is mounted on a board and housed in one longitudinal end (right end) of the housing 95. The light guide is formed into a long prismatic shape. The light guide is housed in the housing 95 with one end face (right end face) in the longitudinal direction facing the LED 21 and the side face (lower face) along the longitudinal direction facing the opening on the bottom surface of the housing 95. be done. Note that a part of the board on which the LED 21 is mounted (hereinafter referred to as a protruding piece 97) protrudes from the rear surface of the housing 95 (see FIG. 2).

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 body A10, the light source unit A11 (light source 2) and the lighting device 1 connect the connector 98 and the electric wire (not shown). electrically connected via the

Further, 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 circuit diagram of FIG. 3.

As described above, the lighting device 1 includes the regular lighting circuit section 10, the emergency lighting circuit section (lighting circuit section) 11, the control section 14, and the like. The lighting device 1 further includes a charging circuit section 12, a switching circuit section 13, a rectifying circuit 40, an input capacitor 41, a control power supply section 42, a power failure detection section 43, a current detection section 44, a voltage detection section 45, and the like.

Rectifier circuit 40 is a diode bridge. The rectifier circuit 40 performs full-wave rectification of an alternating current voltage (for example, a sine wave voltage with a frequency of 50 Hz or 60 Hz and an effective value of 100 V) input from the common 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 section 10.

(3-1) Regular lighting circuit unit The regular lighting circuit unit 10 has a so-called isolated flyback converter including a second transformer T2, a second switching element Q2, a diode D1, and a smoothing capacitor C1.

The first end of the primary winding N21 of the second transformer T2 is electrically connected to the high potential side terminal of the input capacitor 41, and the second end of the primary winding N21 is connected to the drain terminal of the second switching element Q2. electrically connected. The second switching element Q2 is an N-channel field effect transistor. The source terminal of the second switching element Q2 is electrically connected to the low potential side terminal of the input capacitor 41. Further, a gate terminal of the second switching element Q2 is electrically connected to the converter control section 30.

The second transformer T2 has two secondary windings N22 and N23. One end of one secondary winding N22 is electrically connected to the anode of diode D1, and the other end of one secondary winding N22 is electrically connected to the low potential side terminal of 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 21 via the power supply path W1. Further, the low potential side terminal of the smoothing capacitor C1 is electrically connected to the cathode of the LED 21 via two detection resistors R21 and R22 electrically connected in series.

Converter control section 30 is composed of an integrated circuit. Converter control unit 30 performs PWM control on second switching element Q2 so that the current flowing through LED 21 matches the first target value. However, converter control section 30 and second switching element Q2 may be configured as one integrated circuit.

In this way, the regular lighting circuit section 10 includes the insulated second transformer T2 and the second switching element Q2. A series circuit of the primary winding N21 of the second transformer T2 and the second switching element Q2 is connected to the common power supply P1. The light source 2 (LED21) is connected to the secondary winding N22 of the second transformer T2. The regular lighting circuit unit 10 transmits the energy on the primary side of the second transformer T2 to the secondary side by the switching operation of the second switching element Q2, and is connected to the secondary winding N22 of the second transformer T2. Light source 2 (LED 21) is turned on.

Here, the current flowing through the LED 21 is detected by the current detection section 44. The current detection unit 44 outputs a voltage (first detection voltage Vx1) proportional to the current flowing through the LED 21 by differentially amplifying the voltage across the detection resistor R21 on the high potential side.

The first detection voltage Vx1 is input to the reference terminal of the shunt regulator U1 included in the regular lighting circuit section 10. The anode terminal of the shunt regulator U1 is electrically connected to the low potential side terminal of the smoothing capacitor C1. The cathode terminal of the shunt regulator U1 is electrically connected to the low potential side input terminal of the photocoupler 31 and one end of the resistor R2. A high potential side input terminal of the photocoupler 31 is electrically connected to the other end of the resistor R2 and one end of the resistor R1. The other end of the resistor R1 is electrically connected to the constant voltage circuit 32. Note that the resistor R2 connected between the two input terminals of the photocoupler 31 plays a role in causing the minimum cathode current to flow through the shunt regulator U1.

Thus, when the cathode current flowing into the cathode terminal is equal to or higher than the minimum cathode current, the shunt regulator U1 becomes conductive, and a forward current flows through the light emitting diode of the photocoupler 31. The forward current flowing through the light emitting diode is proportional to the voltage value of the first detection voltage Vx1 (the magnitude of the current flowing through the LED 21). Further, the output current of the photocoupler 31 (collector current of the phototransistor) is proportional to the forward current of the light emitting diode.

Here, the output terminal of the photocoupler 31 is electrically connected to the converter control section 30. That is, the converter control unit 30 takes in the first detection voltage Vx1 proportional to the current flowing through the LED 21 via the photocoupler 31, and feeds back the second switching element Q2 so that the first detection voltage Vx1 matches the target voltage. Control. As a result, the regular lighting circuit section 10 can match the current flowing through the LED 21 with the first target value.

By the way, when the lighting device 1 according to the present embodiment is used as an emergency lighting fixture A1, there is a desire to turn off the light source 2 (LED 21) while operating the charging circuit section 12 when the regular power source P1 is not out of power. There is. Note that the Fire Service Act Enforcement Regulations, Article 28-3, Paragraph 4, Item 2 and the Guidelines state that guide lights, which are a type of emergency lighting equipment, can be turned off in places where darkness is required depending on the type of use. Directional lights are permitted to be turned off during performance hours at movie theaters.

In the lighting device 1 according to the embodiment, the control unit 14 controls the switching circuit unit 13 to turn off the switch element 131 inserted in the power supply path W1, so that the LED 21 is turned on when the regular power supply P1 is not out of power. It can be turned off. When the LED 21 is turned off while the common power supply P1 is energized, the first detection voltage Vx1 becomes zero. Therefore, in this embodiment, the voltage detection section 45 outputs the second detection voltage Vx2 proportional to the output voltage of the regular lighting circuit section 10 (the voltage across the smoothing capacitor C1) to the reference terminal of the shunt regulator U1. . However, the voltage detection unit 45 is configured to make the second detection voltage Vx2 lower than the first detection voltage Vx1 when the regular lighting circuit unit 10 lights the LED 21.

That is, when the regular lighting circuit section 10 lights the LED 21, the converter control section 30 performs PWM control on the second switching element Q2 according to the first detection voltage Vx1 instead of the second detection voltage Vx2. At this time, converter control unit 30 performs PWM control on second switching element Q2 so that the current flowing through LED 21 matches the first target value.

On the other hand, when the charging circuit unit 12 continues charging the power storage unit B1 while turning off the LED 21, the first detection voltage Vx1 becomes zero (in other words, the first detection voltage Vx1 is lower than the second detection voltage Vx2). ), the converter control unit 30 performs PWM control on the second switching element Q2 according to the second detection voltage Vx2.

(3-2) Charging Circuit Section The charging circuit section 12 has a so-called isolated flyback converter including a second transformer T2, a second switching element Q2, a diode D2, and a smoothing capacitor C2. However, the charging circuit section 12 shares a part of the second transformer T2 and the second switching element Q2 with the regular lighting circuit section 10.

One end of the other secondary winding N23 of the second transformer T2 is electrically connected to the anode of the diode D2, and the other end of the secondary winding N23 is electrically connected to the low potential side terminal of the smoothing capacitor C2. Ru. Further, the high potential side terminal of the smoothing capacitor C2 and the cathode of the diode D2 are electrically connected. Furthermore, the high potential side terminal of the smoothing capacitor C2 is electrically connected to the constant voltage circuit 32, the constant current circuit 33, the control power supply section 42, and the power failure detection section 43. Further, the low potential side terminal of the smoothing capacitor C2 is electrically connected to the cathode of the LED 21 via two detection resistors R21 and R22.

Constant current circuit 33 uses the voltage across smoothing capacitor C2 as a power source to supply a constant charging current to power storage unit B1. Power storage unit B1 is charged with a charging current supplied from constant current circuit 33. That is, in this embodiment, the emergency power supply P2 includes the power storage unit B1, and the lighting device 1 further includes the charging circuit unit 12 that charges the power storage unit B1 with the power supplied from the regular power supply P1. Since the charging circuit unit 12 charges the power storage unit B1 while the regular power supply P1 is energized, in the event of a power outage of the regular power supply P1, the emergency lighting circuit unit 11 lights up the light source 2 with the power supplied from the power storage unit B1. can be done.

Furthermore, in this embodiment, the charging circuit section 12 includes the secondary winding N23, which is a charging winding connected to the secondary side of the second transformer T2. A power storage unit B1 is connected to the winding. Thereby, in this embodiment, power storage unit B1 can be charged with energy transferred from the primary side to the secondary side of second transformer T2 by the switching operation of second switching element Q2.

(3-3) Emergency lighting circuit section The emergency lighting circuit section (lighting circuit section) 11 includes, for example, a flyback converter. The emergency lighting circuit section 11 includes a first transformer T1, a first switching element Q1, diodes D3 and D4, and smoothing capacitors C3 and C4.

The first end of the primary winding N11 of the first transformer T1 is electrically connected to the positive terminal of the power storage unit B1, and the second end of the primary winding N11 is electrically connected to the drain terminal of the first switching element Q1. connected. The first switching element Q1 is an N-channel field effect transistor. A source terminal of first switching element Q1 is electrically connected to a negative terminal of power storage unit B1. Further, the gate terminal of the first switching element Q1 is electrically connected to the control IC 20.

The first transformer T1 has two secondary windings N12 and N13. One end of the secondary winding N12 is electrically connected to the anode of the diode D3, and the other end of the secondary winding N12 is electrically connected to the low potential side terminal of the smoothing capacitor C3. Further, the high potential side terminal of the smoothing capacitor C3 and the cathode of the diode D3 are electrically connected. Furthermore, the high potential side terminal of the smoothing capacitor C3 is electrically connected to the anode of the LED 21 via the power supply path W1. Further, the low potential side terminal of the smoothing capacitor C3 is electrically connected to the cathode of the LED 21 via two detection resistors R21 and R22 electrically connected in series.

The control IC 20 is composed of an integrated circuit. The control IC 20 operates by being supplied with a control voltage Vcc from the control power supply section 42. When control IC 20 performs PWM control on first switching element Q1, emergency lighting circuit section 11 boosts or steps down the DC voltage supplied from power storage section B1 and outputs it. Here, the control IC 20 takes in the voltage across the detection resistor R22 (third detection voltage Vx3) that is proportional to the current flowing through the LED 21, and controls the first switching element Q1 so that the current flowing through the LED 21 matches the second target value. PWM control. Note that the amount of light when the LED 21 is turned on during a power outage is lower than the amount of light when the LED 21 is turned on when the power is turned on, so the second target value of the emergency lighting circuit section 11 is equal to the first target value of the regular lighting circuit section 10. Set to a value smaller than the value.

In this way, the lighting device 1 further includes the control IC 20 that controls the switching operation of the first switching element Q1. When the control unit 14 detects a power outage of the common power supply P1, the control unit 14 controls the switching circuit unit 13 to be cut off, and then activates the control IC 20 to cause the control IC 20 to start the switching operation of the first switching element Q1. Thereby, when the regular power supply P1 is out of power, the emergency lighting circuit section 11 can light up the LED 21 with the power supplied from the power storage section B1, which is the emergency power supply P2.

Note that the operation modes of the control IC 20 include a first mode in which the switching operation of the first switching element Q1 is stopped, and a second mode in which the switching operation of the first switching element Q1 is performed. The operation mode of the control IC 20 is switched to either the first mode or the second mode by a switching signal S1 input from the control unit 14. The control unit 14 sets the operation mode of the control IC 20 to the first mode when the regular power supply P1 is not out of power. When the control unit 14 detects a power outage of the common power supply P1, it switches the operation mode of the control IC 20 from the first mode to the second mode. In this manner, the control unit 14 operates the control IC 20 in the first mode and makes the control IC 20 standby in the first mode when the common power supply P1 is not out of power. Therefore, the time required for the control IC 20 to start the switching operation of the first switching element Q1 can be shortened compared to the case where the control IC 20 starts energizing at the timing when a power outage of the common power supply P1 is detected. Therefore, when a power outage occurs in the regular power source P1, the time required for the emergency lighting circuit section 11 to start lighting the light source 2 can be shortened.

(3-4) Control Power Supply Unit The control power supply unit 42 includes a three-terminal regulator 420.

The input terminal of three-terminal regulator 420 is connected to the cathode of diode D6. The anode of the diode D6 is connected to the high potential side terminal of the smoothing capacitor C2. Further, the input terminal of the three-terminal regulator 420 is connected to the high potential side terminal of the smoothing capacitor C4. Further, the GND terminal of the three-terminal regulator 420 is connected to the low potential side terminals of the smoothing capacitors C2 and C4.

Therefore, when the power supply P1 is not out of power and the charging circuit section 12 is operating, the voltage of the smoothing capacitor C2 is applied to the input terminal of the three-terminal regulator 420, and the three-terminal regulator 420 receives the control voltage Vcc. Output.

On the other hand, when the regular power supply P1 is out of power and the emergency lighting circuit section 11 is operating, the voltage of the smoothing capacitor C4 is applied to the input terminal of the three-terminal regulator 420, and the three-terminal regulator 420 outputs the control voltage Vcc. Output.

The control power supply unit 42 outputs a control voltage Vcc to the control unit 14, control IC 20, and the like.

(3-5) Switching Circuit Section The switching circuit section 13 includes a drive circuit 130, a switching element 131, a capacitor 132, a resistor 133, a switching element 134, a diode D5, and the like.

Switch element 131 is a P-channel field effect transistor. A source terminal of the switch element 131 is electrically connected to a high potential side output terminal of the regular lighting circuit section 10 (a high potential side terminal of the smoothing capacitor C1). A drain terminal of the switch element 131 is electrically connected to the anode of the LED 21 via a diode D5. That is, the switch element 131 is inserted into the power supply path W1, and can selectively switch the power supply path W1 between a conductive state and a cutoff state. In other words, the lighting device 1 includes the switching circuit section 13 that switches the power supply path W1 from the regular lighting circuit section 10 to the light source 2 between a conductive state and a cutoff state.

Capacitor 132 and resistor 133 are electrically connected in parallel between the source terminal and gate terminal of switch element 131. That is, since the voltage across the capacitor 132 is applied between the source terminal and the gate terminal of the switch element 131, the impedance between the drain and source of the switch element 131 decreases as the voltage across the capacitor 132 increases.

The drive circuit 130 includes two transistors TR1 and TR2 and two resistors R11 and R12. The two transistors TR1 and TR2 are both pnp type bipolar transistors. The emitter of one transistor TR1 is electrically connected to the gate terminal of the switch element 131. The collector of transistor TR1 is electrically connected to the base of the other transistor TR2. The base of the transistor TR1 is electrically connected to the emitter of the transistor TR2 and one end of the resistor R11. The other end of the resistor R11 is electrically connected to the gate terminal of the switch element 131. The collector of the other transistor TR2 is electrically connected to the low potential side terminal of the detection resistor R22.

The drive circuit 130 configured as described above functions as a constant current circuit that causes a constant current to flow through the capacitor 132 or the resistor 133.

The switching element 134 is an npn type bipolar transistor. The collector of the switching element 134 is electrically connected to the collector of the transistor TR1 and the base of the transistor TR2 via a resistor R12. The emitter of the switching element 134 is electrically connected to the collector of the transistor TR2 and the low potential side terminal of the detection resistor R22. A base of the switching element 134 is electrically connected to the control section 14 . That is, the switching element 134 is turned on and off by the control unit 14 as described later. While the switching element 134 is on, the drive circuit 130 operates to maintain the switching element 131 in the on state (conducting state). On the other hand, while the switching element 134 is off, the drive circuit 130 is stopped and the switching element 131 is maintained in the off state (blocking state). Note that the circuit configuration of the switching circuit section 13 shown in FIG. 3 is an example, and the circuit configuration of the switching circuit section 13 can be changed as appropriate.

(3-6) Control unit The control unit 14 includes a microcontroller. The control unit 14 operates by being supplied with a control voltage Vcc from the control power supply unit 42.

The control unit 14 receives a power outage detection signal S2 indicating the presence or absence of a power outage from the power outage detection unit 43. The power failure detection section 43 includes a Zener diode ZD1 and a resistor R31. The cathode terminal of the Zener diode ZD1 is electrically connected to the high potential side output terminal of the charging circuit section 12 (the high potential side terminal of the smoothing capacitor C2). The anode of Zener diode ZD1 is electrically connected to the negative electrode of power storage unit B1 via resistor R31. In other words, if there is no power outage in the regular power supply P1 and the charging circuit section 12 is operating, the Zener diode ZD1 becomes conductive and the voltage across the resistor R31 exceeds the threshold, so the power outage detection section 43 is set to a high level. A power outage detection signal S2 is output. On the other hand, when the charging circuit section 12 is not operating due to a power outage in the regular power supply P1, the voltage across the resistor R31 becomes zero because the Zener diode ZD1 is not conductive, so the power outage detection section 43 detects that the voltage level is low. A power outage detection signal S2 is output.

If there is no power outage in the regular power supply P1, the control unit 14 sets the operation mode of the control IC 20 to the first mode, stops the operation of the emergency lighting circuit unit 11, and controls the switching circuit unit 13 to be in a conductive state. Thereby, the regular lighting circuit section 10 lights up the light source 2 with the power from the regular power source P1.

On the other hand, when the regular power supply P1 has a power outage, the control unit 14 controls the switching circuit unit 13 to be cut off, and then switches the operation mode of the control IC 20 from the first mode to the second mode, so that the emergency lighting circuit unit 11 start the operation. Thereby, the emergency lighting circuit unit 11 lights up the light source 2 with the power from the emergency power supply P2.

Further, control unit 14 monitors voltage VB1 of power storage unit B1. Voltage VB1 on the positive side of power storage unit B1 is input to a voltage follower circuit using operational amplifier OP1 via resistor R30, and output signal S3 of the voltage follower circuit is input to control unit 14. Thereby, control unit 14 monitors voltage VB1 of power storage unit B1 based on output signal S3 (output voltage) of the voltage follower circuit.

While the emergency lighting circuit unit 11 is lighting the light source 2 with the power from the power storage unit B1 during a power outage of the regular power supply P1, the control unit 14 controls the voltage VB1 of the power storage unit B1 to be equal to or lower than the predetermined threshold voltage Vth1. Then, the operation of the emergency lighting circuit section 11 is stopped. That is, the control unit 14 stops the switching operation of the switching element Q1 and maintains the switching element Q1 in the off state. The threshold voltage Vth1 is set, for example, to a voltage higher than the discharge end voltage, and when the voltage VB1 of the power storage unit B1 becomes equal to or lower than the threshold voltage Vth1, the control unit 14 stops the operation of the emergency lighting circuit unit 11. It is possible to reduce the possibility that over-discharge of section B1 will occur. Since the lighting device 1 of the present embodiment reduces the possibility of over-discharging of the power storage unit B1, deterioration of the power storage unit B1 can be suppressed.

In the lighting device 1 of the present embodiment, the control unit 14 controls the emergency lighting circuit unit 11 to receive power from the emergency power supply P2 when a power outage occurs based on the power outage detection signal S2 from the power outage detection unit 43. Since the light source 2 is turned on, the light source 2 can be turned on automatically in the event of a power outage without requiring the user to perform a lighting operation. Therefore, according to the present embodiment, the lighting device can automatically turn on the light source 2 without any lighting operation by the user during a power outage, and can suppress the occurrence of overdischarge of the storage battery B1. 1 can be achieved. Further, the lighting device 1 of this embodiment does not use expensive parts such as MOS relays in the circuit for suppressing the occurrence of overdischarge, so there is an advantage that the cost of the lighting device 1 can be reduced.

Further, the lighting device 1 of the present embodiment includes an operational amplifier OP1 into which the voltage value of the power storage unit B1 is input, and the operational amplifier OP1 outputs an output voltage (output signal S3) corresponding to the voltage value of the power storage unit B1 to the control unit. Output to 14. Control unit 14 detects whether the voltage value of power storage unit B1 is equal to or lower than threshold voltage Vth1 based on the output voltage of operational amplifier OP1. In the lighting device 1 of this embodiment, the voltage value of the power storage unit B1 is input to the operational amplifier OP1, and the input resistance of the operational amplifier OP1 is very large. Therefore, by reducing the current flowing from the power storage unit B1 to the operational amplifier OP1, Loss in the circuit that detects the voltage of power storage unit B1 can be reduced.

(4) Operation description The operation of the lighting device 1 of this embodiment will be explained based on FIG. 4 and the like.

In the following, the lighting device 1 will be described in the case where there is no power outage in the regular power source P1 during the period from time t0 to time t3 and the period after time t4, and when there is a power outage in the regular power source P1 during the period from time t3 to time t4. The operation will be explained. Further, assume that a lights-off signal is input to the lighting device 1 from an external signaling device during a period from time t1 to time t2 when the power supply P1 is not out of power.

During the period from time t0 to time t3, there is no power outage in the common power source P1, so a high-level power outage detection signal S2 is inputted to the control unit 14 from the power outage detection unit 43.

Further, during the first period TM1 from time t0 to time t1, no light-off signal is input to the control unit 14 from the external signal device, so the control unit 14 operates in the normal operation mode.

In the normal operation mode, the control section 14 instructs the converter control section 30 to operate the normal lighting circuit section 10 and the charging circuit section 12, and turns on the switching element 134 to turn on the switching element 131. Switch. That is, the control unit 14 controls the switching circuit unit 13 to be in a conductive state when the common power supply P1 is not out of power. In addition, the control unit 14 outputs a switching signal S1 that sets the operation mode of the control IC 20 to the first mode in the normal operation mode to the control IC 20. At this time, the control IC 20 stops the switching operation of the first switching element Q1, and the emergency lighting circuit section 11 is maintained in a stopped state. Thus, the LED 21 is turned on by the regular lighting circuit section 10 (normal lighting), and the charging circuit section 12 charges the power storage section B1.

Thereafter, during a second period TM2 from time t1 to time t2, when a lights-off signal is input to the control unit 14 from an external signal device, the control unit 14 operates in the always-lights-off operation mode.

In the always-off operation mode, the control unit 14 instructs the converter control unit 30 to operate the regular lighting circuit unit 10 and the charging circuit unit 12, turns off the switching element 134, and turns off the switch element 131. Switch. That is, the control unit 14 controls the switching circuit unit 13 to be in a cut-off state in response to a light-off signal input from the outside when the regular power supply P1 is not out of power. Here, since the regular lighting circuit section 10 and the charging circuit section 12 share one second switching element Q2, when the charging circuit section 12 is operated, the regular lighting circuit section 10 also operates, but the switching circuit section 13 switches the power supply path W1 to the cutoff state, so the LED 21 is not turned on by the regular lighting circuit section 10. Further, since the control unit 14 maintains the emergency lighting circuit unit 11 in a stopped state, the LED 21 is not turned on by the emergency lighting circuit unit 11. Therefore, when the control unit 14 operates in the always-off operation mode, the LED 21 can be turned off while continuing to charge the power storage unit B1.

Note that when the first switching element Q1 of the emergency lighting circuit section 11 is not performing a switching operation, no current flows from the power storage section B1 to the secondary side of the first transformer T1. There is no need to provide a switch element for cutting off the power supply path W1 between the light source 2 and the light source 2. Therefore, by omitting the switch element between the emergency lighting circuit section 11 and the light source 2, the lighting device 1 can be made smaller, and the cost of the lighting device 1 can also be reduced.

When the input of the light-off signal from the signal device to the control unit 14 stops at time t2, the control unit 14 again operates in the normal operation mode during the third period TM3 from time t2 to time t3.

The control unit 14 turns on the switching element 134 to switch the switch element 131 to the on state (that is, to turn the switching circuit unit 13 into a conductive state). Thereby, the lighting device 1 operates in a normal operation mode in which the light source 2 (LED 21) is turned on while the charging circuit section 12 is operated.

Thereafter, during a fourth period TM4 from time t3 to time t4, when the regular power supply P1 has a power outage, a low-level power outage detection signal S2 is input from the power outage detection unit 43 to the control unit 14, and the control unit 14 operates in an emergency. operate in mode.

In the emergency operation mode, the control section 14 operates the emergency lighting circuit section 11, turns off the switching element 134, and switches the switching element 131 to the off state. That is, the control unit 14 controls the switching circuit unit 13 to be in a cut-off state when the regular power supply P1 is out of power. Note that the regular lighting circuit section 10 and the charging circuit section 12 enter a stopped state when the power supply from the regular power source P1 is stopped. In addition, the control unit 14 outputs a switching signal S1 for switching the operation mode of the control IC 20 from the first mode to the second mode to the control IC 20 in the emergency operation mode. At this time, the control IC 20 switches the operation mode from the first mode to the second mode, starts the switching operation of the first switching element Q1, and causes the emergency lighting circuit section 11 to light the LED 21 (emergency lighting).

Thereafter, at time t4, when the power outage of the commercial power supply P1 is restored and power is being supplied from the commercial power supply P1, in the fifth period TM5 after time t4, the power failure detection unit 43 sends a high-level power outage detection signal to the control unit 14. A signal S2 is input. Further, in the fifth period TM5, since the light-off signal is not inputted to the control unit 14 from the external signal device, the control unit 14 operates in the normal operation mode.

In the normal operation mode, the LED 21 is turned on by the normal lighting circuit section 10 (normal lighting), and the charging circuit section 12 charges the power storage section B1.

In addition, while the emergency lighting circuit section 11 is lighting the light source 2 with the power supplied from the power storage section B1, the control section 14 causes the emergency lighting circuit section 11 to The operation of stopping will be explained based on FIG.

During the period from time t10 to time t11, there is no power outage in the common power source P1, so the high-level power outage detection signal S2 is input from the power outage detection unit 43 to the control unit 14. Further, during the period from time t10 to time t11, no light-off signal is input to the control unit 14 from the external signal device, so the control unit 14 operates in the normal operation mode.

In the normal operation mode, the control section 14 instructs the converter control section 30 to operate the normal lighting circuit section 10 and the charging circuit section 12, and turns on the switching element 134 to turn on the switching element 131. Switch. That is, the control unit 14 controls the switching circuit unit 13 to be in a conductive state when the common power supply P1 is not out of power. In addition, the control unit 14 outputs a switching signal S1 that sets the operation mode of the control IC 20 to the first mode in the normal operation mode to the control IC 20. At this time, the control IC 20 stops the switching operation of the first switching element Q1, and the emergency lighting circuit section 11 is maintained in a stopped state. Thus, the LED 21 is turned on by the regular lighting circuit section 10 (normal lighting), and the charging circuit section 12 charges the power storage section B1.

Thereafter, at time t11, when the regular power supply P1 experiences a power outage, a low-level power outage detection signal S2 is input from the power outage detection section 43 to the control section 14, and the control section 14 operates in an emergency operation mode.

In the emergency operation mode, the control section 14 operates the emergency lighting circuit section 11, turns off the switching element 134, and switches the switching element 131 to the off state. That is, the control unit 14 controls the switching circuit unit 13 to be in a cut-off state when the regular power supply P1 is out of power. Note that the regular lighting circuit section 10 and the charging circuit section 12 enter a stopped state when the power supply from the regular power source P1 is stopped. In addition, the control unit 14 outputs a switching signal S1 for switching the operation mode of the control IC 20 from the first mode to the second mode to the control IC 20 in the emergency operation mode. At this time, the control IC 20 switches the operation mode from the first mode to the second mode, starts the switching operation of the first switching element Q1, and causes the emergency lighting circuit section 11 to light the LED 21 (emergency lighting).

When emergency lighting circuit section 11 lights up LED 21 with the power supplied from power storage section B1, voltage VB1 of power storage section B1 gradually decreases. Then, when the voltage value of power storage unit B1 becomes equal to or lower than threshold voltage Vth1 at time t12, control unit 14 outputs to control IC 20 a switching signal S1 that switches the operation mode of control IC 20 from the second mode to the first mode. At this time, the control IC 20 switches the operation mode from the second mode to the first mode and stops the switching operation of the first switching element Q1, so the LED 21 turns off. When the switching operation of the first switching element Q1 is stopped, the transmission of energy from the primary side to the secondary side of the first transformer T1 is stopped, so that further discharge of the power storage unit B1 is suppressed, and overload of the power storage unit B1 is suppressed. The possibility of electrical discharge occurring can be reduced.

The lighting duration of the guide light is determined by the Fire Service Act, etc. as 30 minutes (standard type) or 60 minutes (long-time type), and if the deterioration state of power storage unit B1 is within the permissible range, time t11 The capacity etc. of power storage unit B1 are set so that the time from time to point t12 is 30 minutes or 60 minutes or more.

(5) Modifications The above embodiment is just one of various embodiments of the present disclosure. The embodiments described above can be modified in various ways depending on the design, etc., as long as the objective of the present disclosure can be achieved.

Modifications of the above embodiment will be listed below. The modified examples described below can be applied in combination as appropriate.

(5-1) Modification example 1
The lighting device 1 of Modification 1 differs from the lighting device 1 of the above embodiment in that the emergency lighting circuit section 11 includes a forward converter. FIG. 6 is a circuit diagram of main parts of the lighting device 1 according to the first modification. Note that the configuration other than the emergency lighting circuit section 11 is the same as that of the lighting device 1 of the above embodiment, so common components are given the same reference numerals and explanations thereof will be omitted.

The emergency lighting circuit section 11 has a forward converter circuit configuration, and includes a first transformer T1, a first switching element Q1, diodes D7 to D10, inductors L1 and L2, and smoothing capacitors C5 and C6. have.

The first end of the primary winding N11 of the first transformer T1 is electrically connected to the positive terminal of the power storage unit B1, and the second end of the primary winding N11 is electrically connected to the drain terminal of the first switching element Q1. connected. A source terminal of first switching element Q1 is electrically connected to a negative terminal of power storage unit B1. Further, the gate terminal of the first switching element Q1 is electrically connected to the control IC 20.

The first transformer T1 has two secondary windings N12 and N13.

One end of the secondary winding N12 is electrically connected to the anode of the diode D7, and the other end of the secondary winding N12 is electrically connected to the low potential side terminal of the smoothing capacitor C5. Further, an inductor L1 is electrically connected between the high potential side terminal of the smoothing capacitor C5 and the cathode of the diode D7. Further, the anode of a diode D8 is connected to the low potential side terminal of the smoothing capacitor C5, and the cathode of the diode D8 is connected to the cathode of the diode D7. Here, the high potential side terminal of the smoothing capacitor C5 is electrically connected to the anode of the LED 21 via the power supply path W1. Further, the low potential side terminal of the smoothing capacitor C5 is electrically connected to the cathode of the LED 21 via two detection resistors R21 and R22 electrically connected in series.

Further, one end of the secondary winding N13 is electrically connected to the anode of the diode D9, and the other end of the secondary winding N13 is electrically connected to the low potential side terminal of the smoothing capacitor C6. Furthermore, an inductor L2 is electrically connected between the high potential side terminal of the smoothing capacitor C6 and the cathode of the diode D9. Further, the anode of a diode D10 is connected to the low potential side terminal of the smoothing capacitor C6, and the cathode of the diode D10 is connected to the cathode of a diode D9. Here, the high potential side terminal of the smoothing capacitor C6 is connected to the input terminal of the three-terminal regulator 420, and the low potential side terminal of the smoothing capacitor C6 is connected to the GND terminal of the three-terminal regulator 420.

During a power outage of the common power supply P1, the control IC 20 performs PWM control on the first switching element Q1, whereby energy is transmitted from the primary side of the first transformer T1 to the secondary side, and the DC voltage supplied from the power storage unit B1 is Voltages that are stepped up or stepped down are generated in smoothing capacitors C5 and C6, respectively. As a result, when the regular power supply P1 has a power outage, the emergency lighting circuit section 11 can light up the LED 21 with the power supplied from the power storage section B1, which is the emergency power supply P2, and the control power supply section 42 receives direct current. Can supply voltage.

(5-2) Other Modifications In the above embodiment, the light source 2 is, for example, the LED 21, but it may also be an organic EL or the like.

In the embodiment described above, the lighting device 1 may use a bipolar transistor as the switch element 131 instead of a field effect transistor. Regardless of whether a field effect transistor or a bipolar transistor is used for the switch element 131, manufacturing costs can be reduced and reliability can be improved.

Although the emergency lighting fixture A1 of the above embodiment is a guide light, it may also be an emergency light. In the above embodiment, the regular lighting circuit section 10 and the emergency lighting circuit section 11 light the same light source 2, but the regular lighting circuit section 10 lights the light source and the emergency lighting circuit section 11 lights the light source. It is also possible to use another light source that is different from the above.

(summary)
As explained above, the lighting device (1) of the first aspect includes a lighting circuit section (11) that lights up a light source (2) with electric power supplied from a power storage section (B1), and a control section (14). , is provided. The lighting circuit section (11) includes a transformer (T1) and a switching element (Q1). A series circuit of a primary winding (N11) of a transformer (T1) and a switching element (Q1) is connected to the power storage unit (B1). A light source (2) is connected to the secondary winding (N12) of the transformer (T1). The control unit (14) controls the switching operation of the switching element (Q1). The lighting circuit section (11) transmits the energy on the primary side of the transformer (T1) to the secondary side by the switching operation of the switching element (Q1), and transfers the energy to the secondary winding (N12) of the transformer (T1). Turn on the connected light source (2). The control unit (14) turns off the switching element (Q1) when the voltage value of the power storage unit (B1) becomes equal to or less than the threshold voltage (Vth1).

According to this aspect, the control unit (14) turns off the switching element (Q1) when the voltage value of the power storage unit (B1) becomes equal to or lower than the threshold voltage (Vth1). When the switching element (Q1) is turned off, energy voltage is not transferred from the primary side to the secondary side of the transformer (T1), so further discharge of the power storage unit (B1) can be suppressed, and the power storage unit (B1 ) can reduce the possibility of overdischarge occurring.

In the lighting device (1) of the second aspect, in the first aspect, the lighting circuit section (11) is an emergency lighting circuit section (11). The lighting device (1) further includes a regular lighting circuit section (10) that lights the light source (2) with power supplied from a regular power source (P1). The emergency lighting circuit section (11) lights up the light source (2) using electric power supplied from the power storage section (B1) when the regular power supply (P1) is out of power.

According to this aspect, when the regular power source (P1) is out of power, the emergency lighting circuit section (11) can light up the light source (2) with the power supplied from the power storage section (B1).

In the lighting device (1) of the third aspect, in the second aspect, the transformer (T1) is the first transformer (T1), and the switching element (Q1) is the first switching element (Q1). The regular lighting circuit section (10) includes a second transformer (T2) and a second switching element (Q2). A series circuit of the primary winding (N21) of the second transformer (T2) and the second switching element (Q2) is connected to the common power supply (P1). A light source (2) is connected to the secondary winding (N22) of the second transformer (T2). The regular lighting circuit unit (10) transmits the energy on the primary side of the second transformer (T2) to the secondary side by the switching operation of the second switching element (Q2), and The light source (2) connected to the next winding (N22) is turned on.

According to this aspect, the switching operation of the second switching element (Q2) connected to the primary winding (N21) of the second transformer (T2) causes the transition from the primary side of the second transformer (T2) to the secondary side. can transfer energy to.

The lighting device (1) of the fourth aspect, in the second or third aspect, further includes a charging circuit section (12) that charges the power storage section (B1) with power supplied from the regular power source (P1).

According to this aspect, the charging circuit section (12) charges the power storage section (B1) while the regular power source (P1) is energized, so when the regular power source (P1) is out of power, the emergency lighting circuit section (11) However, the light source (2) can be turned on with the power supplied from the power storage unit (B1).

In the lighting device (1) of the fifth aspect, in any one of the first to fourth aspects, the voltage value of the power storage unit (B1) is input, and the lighting device (1) controls the output voltage corresponding to the voltage value of the power storage unit (B1). It further includes an operational amplifier (OP1) that outputs to the section (14). The control unit (14) detects whether the voltage value of the power storage unit (B1) is equal to or lower than the threshold voltage (Vth1) based on the output voltage of the operational amplifier (OP1).

According to this aspect, the control unit (14) can detect whether to stop the switching operation of the switching element (Q1) based on the output voltage of the operational amplifier (OP1). In addition, since the input resistance of the operational amplifier (OP1) is very large, by reducing the current flowing from the power storage unit (B1) to the operational amplifier (OP1), the loss in the circuit that detects the voltage of the power storage unit (B1) is reduced. can do.

In the lighting device (1) of the sixth aspect, in any one of the first to fifth aspects, the lighting circuit section (11) is a flyback converter.

According to this aspect, the switching element (Q1) connected to the primary winding (N11) of the transformer (T1) performs a switching operation, thereby transferring energy from the primary side to the secondary side of the transformer (T1). can be transmitted.

In the lighting device (1) of the seventh aspect, in any one of the first to fifth aspects, the lighting circuit section (11) is a forward converter.

According to this aspect, the switching element (Q1) connected to the primary winding (N11) of the transformer (T1) performs a switching operation, thereby transferring energy from the primary side to the secondary side of the transformer (T1). can be transmitted.

An emergency lighting device (A1) according to an eighth aspect includes the lighting device (1) according to any one of the first to seventh aspects, a light source (2), a power storage unit (B1), and a container body (A10). , is provided. The container body (A10) accommodates a lighting device (1), a light source (2), and a power storage unit (B1).

According to this aspect, it is possible to provide an emergency lighting fixture (A1) that can reduce the possibility that over-discharge of the power storage unit (B1) will occur.

The configurations according to the second to seventh aspects are not essential to the lighting device (1) and can be omitted as appropriate.

1 Lighting device 2 Light source 10 Regular lighting circuit section 11 Lighting circuit section (emergency lighting circuit section)
12 Charging circuit section 14 Control section A1 Emergency lighting equipment A10 Body B1 Power storage section N11, N21 Primary winding N12, N22 Secondary winding OP1 Operational amplifier P1 Regular power supply Q1 Switching element (first switching element)
Q2 Second switching element T1 Transformer (first transformer)
T2 Second transformer Vth1 Threshold voltage

Claims (8)

a lighting circuit unit that lights up the light source using power supplied from the power storage unit;
comprising a control unit;
The lighting circuit section includes a transformer and a switching element,
A series circuit of the primary winding of the transformer and the switching element is connected to the power storage unit,
The light source is connected to a secondary winding of the transformer,
The control unit controls a switching operation of the switching element,
The lighting circuit unit transmits energy on the primary side of the transformer to the secondary side by a switching operation of the switching element, and lights the light source connected to the secondary winding of the transformer.
The control unit turns off the switching element when the voltage value of the power storage unit becomes equal to or less than a threshold voltage.
lighting device. The lighting circuit section is an emergency lighting circuit section,
Further comprising a regular lighting circuit unit that lights the light source with power supplied from a regular power source,
The emergency lighting circuit unit lights up the light source with power supplied from the power storage unit when the regular power source is out of power.
The lighting device according to claim 1. The transformer is a first transformer, the switching element is a first switching element,
The regular lighting circuit section includes a second transformer and a second switching element,
A series circuit of the primary winding of the second transformer and the second switching element is connected to the common power supply,
The light source is connected to a secondary winding of the second transformer,
The regular lighting circuit unit transmits the energy on the primary side of the second transformer to the secondary side by the switching operation of the second switching element, and the normal lighting circuit unit transmits the energy on the primary side of the second transformer to the secondary side by switching the second switching element. turn on the light source,
The lighting device according to claim 2. further comprising a charging circuit unit that charges the power storage unit with power supplied from the regular power source;
The lighting device according to claim 2. further comprising an operational amplifier into which the voltage value of the power storage unit is input and outputs an output voltage corresponding to the voltage value of the power storage unit to the control unit,
The control unit detects whether the voltage value of the power storage unit is equal to or lower than the threshold voltage based on the output voltage of the operational amplifier.
The lighting device according to any one of claims 1 to 4. the lighting circuit section is a flyback converter;
The lighting device according to any one of claims 1 to 4. the lighting circuit section is a forward converter;
The lighting device according to any one of claims 1 to 4. The lighting device according to any one of claims 1 to 4,
the light source;
The power storage unit;
a container housing the lighting device, the light source, and the power storage unit;
Equipped with
Emergency lighting equipment.

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