JP7357216B2 - Lighting devices, disaster prevention lighting equipment, and disaster prevention lighting systems - Google Patents

Description

The present disclosure relates to a lighting device, a disaster prevention lighting device, and a disaster prevention lighting system.

The conventional emergency lighting device described in Patent Document 1 includes a regular lighting circuit, a charging circuit, an inverter circuit, and a control unit.

The regular lighting circuit supplies power input from a commercial power source to an inverter circuit, and the inverter circuit supplies lighting power to the light source.

The charging circuit charges the battery with power input from the commercial power source when in the regular lighting mode. On the other hand, in the event of an emergency such as a power outage of the commercial power source, the lighting control section outputs an operation command to the charging circuit to supply charging power of the battery to the inverter circuit. The inverter circuit supplied with battery charging power supplies lighting power to the light source. Therefore, even if the commercial power supply is interrupted, the light source can continue to be lit.

JP2008-84780A

As described above, in disaster prevention lighting equipment such as emergency lighting devices, a control circuit (lighting control section) controls the lighting circuit (charging circuit and inverter circuit) during a power outage. However, if an abnormality occurs in the control circuit, the control circuit will no longer be able to control the lighting circuit. As a result, if an abnormality occurs in the control circuit during a power outage, there is a possibility that the light source will not turn on.

An object of the present disclosure is to provide a lighting device, a disaster prevention lighting fixture, and a disaster prevention lighting system that can turn on a light source even if an abnormality occurs in a control circuit during a power outage.

A lighting device according to one aspect of the present disclosure includes a lighting circuit, a control circuit, and an abnormality detection circuit that detects an abnormality in the control circuit . The lighting circuit executes emergency lighting in which the light source is turned on using emergency power supplied from a battery when the external power supply is stopped. The control circuit controls the lighting circuit by outputting a control signal to the lighting circuit. The control circuit outputs the control signal whose output level can be switched to at least a first level and a second level higher than the first level, and when the control circuit is abnormal, at least a part of the control signal is output to the second level. Level 1. The lighting circuit executes the emergency lighting when receiving the control signal at the first level, and does not execute the emergency lighting when receiving the control signal at the second level. If the abnormality detection circuit detects an abnormality in the control circuit at least when the external power supply is stopped, the control circuit controls the control circuit so that the output level of at least a portion of the control signal becomes the first level. Control signals. The abnormality detection circuit compares the output level of the control signal with an output level indicated by data in the control circuit, and determines whether the output level of the control signal is an output level indicated by data in the control circuit. If different, an abnormality in the control circuit is detected.

A disaster prevention lighting device according to an aspect of the present disclosure includes the above-described lighting device, a light source that is lit by the output of the lighting device, a battery that supplies emergency power to the lighting device to light the light source, and a main body. and. The lighting device, the light source, and the battery are attached to the main body.

A disaster prevention lighting system according to one aspect of the present disclosure includes the plurality of disaster prevention lighting fixtures described above.

As described above, the present disclosure has the advantage that even if an abnormality occurs in the control circuit during a power outage, the light source can be turned on.

FIG. 1 is a block diagram showing the configuration of a disaster prevention lighting fixture including a lighting device according to an embodiment of the present disclosure. FIG. 2 is a circuit diagram showing the configuration of a DC power supply circuit included in the above lighting device. FIG. 3 is a circuit diagram showing a first specific example of a lighting circuit included in the above lighting device. FIG. 4 is a diagram for explaining the operation of the first specific example. FIG. 5 is a circuit diagram showing a second specific example of a lighting circuit included in the above lighting device. FIG. 6 is a diagram for explaining the operation of the second specific example. FIG. 7 is a configuration diagram showing an output end of a control circuit included in the above lighting device. FIG. 8A is a top view of the disaster prevention lighting device same as above. FIG. 8B is a bottom view of the disaster prevention lighting device same as above. FIG. 8C is a side view of the disaster prevention lighting equipment same as above. FIG. 9 is a block diagram showing the configuration of a disaster prevention lighting system according to an embodiment of the present disclosure.

Each figure described in the following embodiments is a schematic diagram, and the ratio of the size and thickness of each component does not necessarily reflect the actual size ratio. 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) Outline of Disaster Prevention Lighting Equipment The disaster prevention lighting equipment 1 according to the embodiment is an embedded emergency light that is embedded in an embedded hole provided in the indoor ceiling of a building. However, disaster prevention lighting equipment is not limited to recessed emergency lights. The disaster prevention lighting equipment may be an exposed emergency light that is directly attached to the ceiling, or it may be a disaster prevention lighting equipment other than emergency lights such as a guide light.

The following embodiments generally relate to lighting devices, disaster prevention lighting equipment, and disaster prevention lighting systems. More specifically, the following embodiments relate to a lighting device that turns on a light source in an emergency, a disaster prevention lighting fixture, and a disaster prevention lighting system.

FIG. 1 shows a block configuration of a disaster prevention lighting fixture 1 of this embodiment. The disaster prevention lighting fixture 1 includes a light source 2, a battery 3, and a lighting device 4.

The light source 2 includes a plurality of solid-state light emitting elements. For example, the light source 2 includes an LED array in which a plurality of LEDs (Light Emitting Diodes) are connected in series as a plurality of solid-state light emitting elements. Note that the light source 2 is not limited to having an LED as a solid-state light emitting element. The light source 2 may include, for example, an organic EL (Organic Electro Luminescence, OEL) or other solid state light emitting device such as a semiconductor laser diode (LD).

The battery 3 is a rechargeable storage battery (secondary battery) and corresponds to an emergency power source. Although the battery 3 is not limited to a particular type of secondary battery, it is preferable that the battery 3 is, for example, a nickel-hydrogen battery or a nickel-cadmium battery. The battery 3 can output emergency power by discharging the stored charge during a power outage. That is, the power supplied from the battery 3 during a power outage is emergency power.

The lighting device 4 includes a charging circuit 40, a lighting circuit 41, and a control circuit 42. It is preferable that the lighting device 4 further includes a notification circuit 43 (notification section). Further, it is preferable that the lighting device 4 further includes a DC power supply circuit 45, a power failure detection circuit 46, a receiving section 47, a monitor lamp 48, and a push button switch 49. The lighting device 4 of this embodiment includes three pushbutton switches 49, and when distinguishing the three pushbutton switches 49, they are referred to as pushbutton switches 49A, 49B, and 49C, respectively.

The DC power supply circuit 45 is configured with a switching power supply circuit such as a flyback converter, for example, and converts the AC voltage supplied from the external power supply (for example, a commercial power system) 9 into a DC voltage lower than the effective value of the AC voltage. It is preferable to convert it into The charging circuit 40 is preferably configured to operate when powered by the external power supply 9 and to flow a charging current from the DC power supply circuit 45 to the battery 3 . It is preferable that the lighting circuit 41 is configured to constant current the DC current supplied from the battery 3 and supply it to the light source 2 . The power outage detection circuit 46 is configured to detect a power outage in the external power supply 9 from the output voltage of the DC power supply circuit 45 and notify the control circuit 42 of the detected power outage. The external power supply 9 is a 100V or 200V commercial power system.

The monitor lamp 48 is composed of, for example, a light emitting diode that emits green light. The receiving unit 47 is configured to receive a wireless signal using infrared rays as a communication medium, demodulate a transmission frame from the received wireless signal, and pass the demodulated frame to the control circuit 42 . This wireless signal is transmitted from a wireless transmitter operated by an inspector who performs periodic inspections, user inspections, and the like.

Note that periodic inspections are carried out at intervals stipulated by law, and are performed by forcibly operating the lighting circuit 41 and discharging the battery 3 for a specified period of time to ensure that the illuminance of the floor surface provided by the light source 2 is maintained. The purpose is to confirm whether The purpose of the user inspection is to forcibly operate the lighting circuit 41 and discharge the battery 3 for a short time to check the degree of deterioration of the battery 3.

The notification circuit 43 is a notification section having a notification function, and includes, for example, a monochrome display element 431, a sounding part 432 such as a piezoelectric sounder, and a drive circuit 433 that drives the display element 431 and the sounding part 432. The drive circuit 433 drives the display element 431 to emit light, and drives the sound generating section 432 to generate sound. Note that the notification circuit 43 may use the monitor lamp 48 as a display element.

The control circuit 42 is configured to have the functions of a lighting control circuit 421, an abnormality detection circuit 422, a notification control circuit 423, and an inspection control circuit 424.

The control circuit 42 operates by being supplied with power from the external power supply 9, the battery 3, or the control power supply. Preferably, control circuit 42 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 42 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 semiconductor integrated circuits or large-scale integrated circuits.

The lighting control circuit 421 operates the charging circuit 40 when the power outage detection circuit 46 does not detect a power outage. Furthermore, when the power outage detection circuit 46 detects a power outage, the lighting control circuit 421 stops the charging circuit 40 and causes the battery 3 to supply emergency power to the lighting circuit 41 . The lighting circuit 41 supplied with the emergency power executes emergency lighting to light the light source 2 with the emergency power. Furthermore, regardless of the state of charge of the battery 3, the charging circuit 40 may be stopped and the lighting circuit 41 may be operated to cause the light source 2 to be constantly lit (for example, fully lit). Further, if the amount of charge in the charging circuit 40 is sufficiently smaller than the amount of discharge to the lighting circuit 41 (for example, trickle charging), the lighting circuit 41 is operated without stopping the charging circuit 40, and the light source 2 is turned on steadily (for example, at full capacity). (lights up) in some cases.

Furthermore, when the push button switch 49A is pressed or when the transmission frame of the periodic inspection signal is received from the receiving section 47, the inspection control circuit 424 determines that there is an instruction for periodic inspection from an inspector or the like. If the battery 3 is fully charged, the inspection control circuit 424 stops the charging circuit 40 and operates the lighting circuit 41 to discharge the battery 3 for a predetermined period of time. Perform regular inspections. If the battery 3 is not fully charged, the inspection control circuit 424 first operates the charging circuit 40 to bring the battery 3 to a fully charged state, and then stops the charging circuit 40 for a predetermined period of time. , and the lighting circuit 41 is operated to discharge the battery 3, and a periodic inspection is performed. In addition, if the battery 3 is not fully charged, the inspection control circuit 424 operates the charging circuit 40 to charge the battery 3 and operates the lighting circuit 41 for a predetermined period of time to charge the battery 3. 3 may be discharged. Furthermore, regardless of the state of charge of the battery 3, the charging circuit 40 may be stopped and the lighting circuit 41 may be operated to cause the light source 2 to be constantly lit (for example, fully lit). Further, if the amount of charge in the charging circuit 40 is sufficiently smaller than the amount of discharge to the lighting circuit 41 (for example, trickle charging), the lighting circuit 41 is operated without stopping the charging circuit 40, and the light source 2 is turned on steadily (for example, at full capacity). (lights up) in some cases. Note that it is not essential to discharge the battery 3 when performing the periodic inspection, and the periodic inspection may be performed without discharging the battery 3.

When the push button switch 49B is pressed, the inspection control circuit 424 stops the operation of the charging circuit 40, supplies the discharged power of the battery 3 to the lighting circuit 41, and lights the lighting circuit 41 with the discharged power of the battery 3. Confirm the emergency lights by operating them for a few seconds.

When the push button switch 49C is pressed or when the transmission frame of the user inspection signal is received from the receiving section 47, the inspection control circuit 424 determines that there is an instruction for user inspection from an inspector or the like. The control circuit 42 is configured to stop the charging circuit 40 and operate the lighting circuit 41 for a shorter period of time than in regular inspections to discharge the battery 3 and perform user inspections.

The notification control circuit 423 controls the notification circuit 43. The notification control circuit 423 causes the inspection control circuit 424 to notify the periodic inspection, emergency lighting confirmation, and user inspection of the respective execution timings, and to notify the results of each inspection.

The notification circuit 43 notifies the execution timing of each periodic inspection, emergency lighting confirmation, and user inspection by the inspection control circuit 424, and notifies each inspection result. When the drive circuit 433 detects an abnormality in the battery 3 through, for example, any inspection, the drive circuit 433 notifies the battery abnormality by lighting or blinking the display element 431. Further, the drive circuit 433 may notify the battery abnormality by outputting a sound from the sound generating section 432. The sound output by the sound generating unit 432 is, for example, a message notifying an abnormality in the battery 3, "An abnormality in the battery 3 has been detected. We recommend replacing the battery 3.", or a buzzer sound. The battery abnormality notification in this embodiment refers to notification that notifies a person that the battery 3 is abnormal and urges the person to replace the battery 3.

(2) Specific example of DC power supply circuit FIG. 2 shows a circuit using a flyback converter as a specific example of the DC power supply circuit 45. The DC power supply circuit 45 mainly includes a rectifier DB1, an input capacitor C1, a transformer Tr1, an intelligent power device IC1, a diode D3, and an output capacitor C6.

The rectifier DB1 has a plurality of full-bridge connected diodes, and performs full-wave rectification of the AC voltage of the external power supply 9. An input capacitor C1 is connected between the output terminals of the rectifier DB1. Input capacitor C1 smoothes the rectified voltage output by rectifier DB1. A series circuit of the primary winding N1 of the transformer Tr1 and the intelligent power device IC1 is connected between both ends of the input capacitor C1.

The intelligent power device IC1 in FIG. 2 is, for example, MIP0222 manufactured by Panasonic Corporation. The intelligent power device IC1 includes an N-channel enhancement type power MOSFET (Metal Oxide Semiconductor Field Effect Transistor) and an internal circuit that controls the power MOSFET. The internal circuit includes an error amplifier, an oscillator, a flip-flop, a gate driver, a startup power supply, and the like. Note that the drain of the power MOSFET built in the intelligent power device IC1 is connected to the drain terminal P1 of the intelligent power device IC1. Further, the source of the power MOSFET is connected to the source terminal P2 of the intelligent power device IC1. The internal circuit is connected to the control terminal P3 of the intelligent power device IC1.

A first end of the primary winding N1 is connected to the positive terminal of the input capacitor C1. The drain terminal P1 of the intelligent power device IC1 is connected to the second end of the primary winding N1. The source terminal P2 of the intelligent power device IC1 is connected to the negative terminal of the input capacitor C1.

A snubber circuit including a diode D1, a resistor R1, and a capacitor C2 is connected between both ends (first end and second end) of the primary winding N1. The anode of the diode D1 is connected to the drain terminal P1 (the second end of the primary winding N1), and the cathode of the diode D1 is connected to the positive pole of the input capacitor C1 (the first end of the primary winding N1) through the resistor R1. ). A capacitor C2 is connected in parallel to the resistor R1.

A series circuit of a diode D3 and an output capacitor C6 is connected between both ends of the secondary winding N2 of the transformer Tr1. The anode of diode D3 is connected to the first end of secondary winding N2, and the cathode of diode D3 is connected to the positive terminal of output capacitor C6. The negative pole of output capacitor C6 is connected to the second end of secondary winding N2.

Then, when the power MOSFET of the intelligent power device IC1 is turned on, current flows through the primary winding N1 and energy is stored. When the power MOSFET is turned off, the energy stored in the primary winding N1 is output from the secondary winding N2 through the diode D3, and a DC normal voltage Vd1 is generated across the output capacitor C6. That is, by turning on and off the intelligent power device IC1 (its power MOSFET), a common voltage Vd1 is generated across the output capacitor C6.

The DC power supply circuit 45 controls the value of the common voltage Vd1 to a predetermined value by feeding back the common voltage Vd1 and controlling the switching of the intelligent power device IC1.

Specifically, a series circuit of a resistor R6 and a resistor R7 is connected between both ends of the output capacitor C6. A connection point between resistor R6 and resistor R7 is connected to a control terminal of shunt regulator SR1. The cathode of shunt regulator SR1 is connected to the positive terminal of output capacitor C6 via a series circuit of resistor R4 and resistor R5. A series circuit of a resistor R8 and a capacitor C7 is connected between the cathode of the shunt regulator SR1 and the control terminal. The input diode of the photocoupler PC1 is connected in parallel to the resistor R5.

Furthermore, a series circuit of a diode D2, a resistor R2, and a capacitor C3 is connected between both ends of the tertiary winding N3 of the transformer Tr1. A series circuit consisting of the output transistor of the photocoupler PC1, a resistor R3, and a capacitor C4 is connected between both ends of the capacitor C3. A capacitor C5 is connected in parallel to the series circuit of the resistor R3 and the capacitor C4. The positive electrode of capacitor C5 is connected to the gate of switching element Q1, and the negative electrode of capacitor C5 is connected to the source of switching element Q1.

When the value of the common voltage Vd1 exceeds the reference voltage inside the shunt regulator SR1, conduction occurs between the anode and cathode of the shunt regulator SR1, current flows through the input diode of the photocoupler PC1, and the output transistor of the photocoupler PC1 Turn on. When the output transistor of the photocoupler PC1 is turned on, the voltage of the capacitor C3 charged by the induced voltage of the tertiary winding N3 is applied between the control terminal P3 and the source terminal P2. The internal circuit of the intelligent power device IC1 controls the power MOSFET to reduce the output of the DC power supply circuit 45 when the voltage of the capacitor C3 increases. As a result, the common voltage Vd1 is controlled to decrease.

Next, when the value of the common voltage Vd1 falls below the reference voltage, the anode and cathode of the shunt regulator SR1 are cut off, no current flows through the input diode of the photocoupler PC1, and the output transistor of the photocoupler PC1 is turned off. When the output transistor of the photocoupler PC1 is turned off, the voltage of the capacitor C3 decreases, and the internal circuit of the intelligent power device IC1 controls the power MOSFET to increase the output of the DC power supply circuit 45. As a result, the common voltage Vd1 is controlled to increase.

In this way, the DC power supply circuit 45 controls the value of the common voltage Vd1 to a predetermined value by feeding back the common voltage Vd1 via the photocoupler PC1 and controlling the switching of the intelligent power device IC1. It is preferable that the DC power supply circuit 45 further has a voltage step-down function and a power factor correction function.

Note that the DC power supply circuit 45 is not limited to a configuration using a flyback converter, and may have any configuration as long as it can convert the AC voltage of the external power supply 9 to the common voltage Vd1.

(3) First Specific Example of Lighting Circuit FIG. 3 shows a circuit configuration of a first specific example of the lighting circuit 41. The lighting circuit 41 includes a switching circuit 41a, an emergency lighting circuit 41b, and a current adjustment circuit 41c. In addition, in FIG. 3, the charging circuit 40 receives the normal voltage Vd1 as input, and charges the battery 3 through the diode D10 for preventing backflow.

The switching circuit 41a has a function of switching the power source for lighting the light source 2 to either the DC power supply circuit 45 or the battery 3. Specifically, the switching circuit 41a includes transistors Q11 to Q13, resistors R11 to R13, and capacitors C11 and C12. Transistors Q11 and Q12 are PNP type bipolar transistors. Transistor Q13 is an NPN type bipolar transistor. Note that the transistors Q11 and Q12 may be normally-on depletion type FETs or mechanical relays.

The emitter of transistor Q11 is connected to the positive terminal of output capacitor C6 (see FIG. 2), and the collector of transistor Q11 is connected to the collector of transistor Q12. The base of transistor Q11 is connected to the collector of transistor Q13 via resistor R11, and the emitter of transistor Q13 is connected to the negative electrode of output capacitor C6 (see FIG. 2). A capacitor C11 is connected between the base and emitter of transistor Q11. A capacitor C12 is connected between the base and emitter of transistor Q12. The base of transistor Q12 is connected to control circuit 42 via resistor R12. The base of transistor Q13 is connected to control circuit 42 via resistor R13.

The emergency lighting circuit 41b boosts the battery voltage Vb and outputs a DC emergency voltage Vd2. The value of the emergency voltage Vd2 is the same (or almost the same) as the normal voltage Vd1. Specifically, the emergency lighting circuit 41b includes transistors Q21, Q22, resistors R21 to R25, an output capacitor C21, an inductor L21, a diode D21, and a switching controller 411 (hereinafter abbreviated as SW controller 411). Transistor Q21 is an N-channel enhancement type MOSFET. Transistor Q22 is an NPN type bipolar transistor.

A series circuit of an inductor L21 and a transistor Q21 is connected between both ends of the battery 3. A series circuit of a diode D21 and an output capacitor C21 is connected between the drain and source of the transistor Q21. A series circuit of a resistor R21 and a resistor R22 is connected between both ends of the output capacitor C21. The gate of transistor Q21 is connected to SW controller 411 via resistor R23. Further, a series circuit of a resistor R24 and a transistor Q22 is connected between both ends of the battery 3. The base of transistor Q22 is connected to control circuit 42 via resistor R25.

In this embodiment, as an example of the SW controller 411, S-8355 manufactured by ABLIC Inc. is used. The SW controller 411 uses the battery voltage Vb as an operating power source. The SW controller 411 is connected to the collector of the transistor Q22, and if the collector voltage Vc1 of the transistor Q22 is at L level, the SW controller 411 maintains the transistor Q21 in an off state and stops the boosting operation of the battery voltage Vb. When the collector voltage Vc1 of the transistor Q22 is at H level, the SW controller 411 turns on and off the transistor Q21 to boost the battery voltage Vb. The SW controller 411 that performs the step-up operation acquires the voltage at the connection point between the resistor R21 and the resistor R22 as the detected value of the emergency voltage Vd2, and turns on and off the transistor Q21 so that the value of the emergency voltage Vd2 becomes a predetermined value. .

The control circuit 42 outputs a control signal Y1 and a control signal Y2, and controls each operation of the switching circuit 41a and the emergency lighting circuit 41b using the control signal Y1 and the control signal Y2. The control signal Y1 and the control signal Y2 are binary voltage signals that have a voltage value as an output level and can be switched to either an L level (first level) or an H level (second level). Control signal Y1 is transmitted to the base of transistor Q12 via resistor R12, and then transmitted to the base of transistor Q22 via resistor R25. Control signal Y2 is transmitted to the base of transistor Q13 via resistor R13. In the following description, the control signals Y1 and Y2 whose output level is L level will be referred to as L level control signals Y1 and Y2, and the control signals Y1 and Y2 whose output level is H level will be referred to as H level control signal. They may also be referred to as signals Y1 and Y2.

FIG. 4 is a time chart showing the waveforms of the control signals Y1, Y2 and the collector voltage Vc1, and the states of the transistors Q11, Q12, Q13, and Q22.

The control circuit 42 controls the control signal Y1 and the control signal Y2 to the H level during the normal period Ta1 in which the power outage detection circuit 46 does not detect a power outage.

When the control signal Y1 is at H level, the transistor Q12 is turned off and the transistor Q22 is turned on. Since the collector voltage Vc1 of the transistor Q22 is at the L level, the SW controller 411 maintains the transistor Q21 in an off state and stops the boosting operation of the battery voltage Vb. Further, the current path from the positive electrode of the output capacitor C21 to the light source 2 is cut off by the transistor Q12 which is in an off state.

When the control signal Y2 is at H level, the transistor Q13 is turned on, and as a result, the transistor Q11 is turned on. Therefore, the common voltage Vd1 is outputted via the transistor Q11. That is, the switching circuit 41a outputs the normal voltage Vd1 if the power outage detection circuit 46 does not detect a power outage.

Furthermore, during the power outage period Tb1 during which the power outage detection circuit 46 detects a power outage, the control circuit 42 controls the control signal Y1 and the control signal Y2 to the L level, respectively.

When control signal Y2 is at L level, transistor Q13 is turned off, and as a result, transistor Q11 is turned off. Therefore, the current path to the light source 2 due to the common voltage Vd1 is blocked by the off-state transistor Q11.

When the control signal Y1 is at L level, the transistor Q12 is turned on and the transistor Q22 is turned off. Since the collector voltage Vc1 of the transistor Q22 is at H level, the SW controller 411 turns on and off the transistor Q21 to boost the battery voltage Vb. Further, the current path between the positive electrode of the output capacitor C21 and the light source 2 is made conductive by the transistor Q12 in the on state. Therefore, emergency voltage Vd2 is output via transistor Q12. That is, the switching circuit 41a outputs the emergency voltage Vd2 if the power outage detection circuit 46 detects a power outage.

The normal voltage Vd1 or the emergency voltage Vd2 output by the switching circuit 41a is applied to a series circuit of the current adjustment circuit 41c and the light source 2. Note that in order to prevent transistors Q11 and Q12 from being on at the same time, it is preferable to provide a simultaneous off period of about several milliseconds during which both transistors Q11 and Q12 are off when the states of transistors Q11 and Q12 are switched.

The current adjustment circuit 41c matches the value of the load current flowing through the light source 2 with the target current value. Specifically, the current adjustment circuit 41c includes transistors Q31, Q32, resistors R31 to R33, and a shunt regulator SR31. Transistors Q31 and Q32 are NPN type bipolar transistors.

A series circuit of the light source 2, the transistor Q31, and the resistor R31 is connected between the output terminals of the switching circuit 41a. The light source 2 uses LEDs (Light Emitting Diodes) as solid-state light emitting elements, and includes a plurality of LEDs connected in series. In a pair of adjacent LEDs, the cathode of one LED is connected to the anode of the other LED. The light source 2 has a high potential side as an anode side and a low potential side as a cathode side. In this case, the anode side of the light source 2 is connected to each collector of the transistors Q11 and Q12. The cathode side of the light source 2 is connected to the collector of the transistor Q31. The emitter of transistor Q31 is connected to the emitter of transistor Q13 via resistor R31.

A series circuit of a resistor R32 and a shunt regulator SR31 is further connected between the output terminals of the switching circuit 41a. A first end of the resistor R32 is connected to the anode side of the light source 2, and a second end of the resistor R32 is connected to the cathode of the shunt regulator SR31. The anode of shunt regulator SR31 is connected to the emitter of transistor Q31 via resistor R31. The emitter of transistor Q31 is connected to the control terminal of shunt regulator SR31. The base of transistor Q31 is connected to the emitter of transistor Q32, and the collector of transistor Q32 is connected to the anode side of light source 2 via resistor R33.

When the voltage across the resistor R31 caused by the load current exceeds a reference voltage (corresponding to a target current value) inside the shunt regulator SR31, conduction occurs between the anode and cathode of the shunt regulator SR31. When conduction occurs between the anode and cathode of shunt regulator SR31, transistor Q32 is turned off, and transistor Q31 is turned off. Then, when the voltage across the resistor R31 becomes lower than the reference voltage inside the shunt regulator SR31, the anode and cathode of the shunt regulator SR31 are cut off. When the anode and cathode of the shunt regulator SR31 are cut off, the transistor Q32 is turned on and the transistor Q31 is turned on. As a result, the value of the load current matches the target current value.

Therefore, if the power failure detection circuit 46 does not detect a power failure, a load current using the common voltage Vd1 as a power source flows through the light source 2, and the light source 2 lights up. If the power outage detection circuit 46 detects a power outage, a load current using the emergency voltage Vd2 as a power source flows through the light source 2, and the light source 2 lights up. The current adjustment circuit 41c matches the value of the load current flowing through the light source 2 with the target current value.

As described above, when the control circuit 42 controls the control signal Y1 and the control signal Y2 to the L level, the lighting circuit 41 causes a load current using the emergency voltage Vd2 as a power source to flow through the light source 2. On the other hand, when the control circuit 42 controls the control signal Y1 and the control signal Y2 to H level, the lighting circuit 41 causes a load current using the common voltage Vd1 as a power source to flow through the light source 2. That is, the control circuit 42 controls the control signal Y1 and the control signal Y2 to the L level at the time of a power outage of the external power supply 9, at the time of periodic inspection, at the time of lighting inspection, and at the time of user inspection. Further, the control circuit 42 controls the control signal Y1 and the control signal Y2 to the H level, respectively, unless there is a power outage of the external power supply 9, a periodic inspection, a lighting inspection, or a user inspection.

Here, due to an abnormality in the control circuit 42, at least one of the control signal Y1 and the control signal Y2 may not be output normally. For example, an abnormality may occur in which at least one of the control signal Y1 and the control signal Y2 is fixed at the L level and does not switch to the H level due to electrostatic damage in the output stage of the control circuit 42.

Therefore, the lighting circuit 41 is configured to flow a load current using the emergency voltage Vd2 as a power source to the light source 2 upon receiving the L level control signal Y1 and the L level control signal Y2. Therefore, even if at least one of the control signal Y1 and the control signal Y2 is fixed at the L level due to an abnormality in the control circuit 42 during a power outage of the external power supply 9, the lighting circuit 41 cannot be used as a load for a load whose power source is the emergency voltage Vd2. Emergency lighting can be performed by passing current through the light source 2. As a result, the lighting device 4 can turn on the light source 2 even if an abnormality occurs in the control circuit 42 during a power outage, so it is fail-safe and can improve the reliability of the disaster prevention lighting equipment 1. .

Note that the control signal Y1 and the control signal Y2 may be current signals whose output level is a current value. In this case, the control signal Y1 and the control signal Y2 are binary current signals whose current values can be switched to either an L level (first level) or an H level (second level).

(4) Second specific example of lighting circuit FIG. 5 shows a circuit configuration of a second specific example of the lighting circuit 41. The lighting device 4 further includes a control power source 44. The control power supply 44 receives the battery voltage Vb and outputs the control voltage Vs1. The control voltage Vs1 serves as an operating power source for the control circuit 42. In addition, in FIG. 5, the charging circuit 40 receives the normal voltage Vd1 as input, and charges the battery 3 through the diode D10 for preventing backflow.

The lighting circuit 41 boosts the battery voltage Vb and outputs a DC emergency voltage Vd3. Specifically, the lighting circuit 41 includes transistors Q41 to Q44, resistors R41 to R411, capacitors C41 to C46, an inductor L41, a diode D41, and a switching controller 412 (hereinafter abbreviated as SW controller 412). Transistors Q41 and Q43 are N-channel enhancement type MOSFETs. Transistors Q42 and Q44 are NPN type bipolar transistors.

Battery voltage Vb is applied across the capacitor C41. A series circuit of an inductor L41 and a transistor Q41 is connected between both ends of the capacitor C41. A series circuit of a diode D41 and a capacitor C42 is connected between the drain and source of the transistor Q41. The anode of diode D41 is connected to the drain of transistor Q41, and the cathode of diode D41 is connected to the positive electrode of capacitor C42. The negative electrode of capacitor C42 is connected to the negative electrode of capacitor C41. A series circuit of the light source 2, the transistor Q43, and the resistor R48 is connected between both ends of the capacitor C42. The anode side of the light source 2 is connected to the positive electrode of the capacitor C42. The cathode side of light source 2 is connected to the drain of transistor Q43. The source of transistor Q43 is connected to the negative electrode of capacitor C42 via resistor R48. The gate of transistor Q43 is connected to the positive output of control power supply 44 via resistor R49, and to the source of transistor Q43 via resistor R410. A resistor R410 is connected between the collector and emitter of transistor Q44. The base of transistor Q44 is connected to control circuit 42 via resistor R411. The gate of transistor Q41 is connected to SW controller 412 via resistor R41. A resistor R42 is connected between the gate and source of the transistor Q41.

Control voltage Vs1 is applied to the series circuit of resistor R43 and capacitor C43. The connection point between resistor R43 and capacitor C43 is connected to the collector of transistor Q42, and the emitter of transistor Q42 is connected to the negative electrode of capacitor C41. The base of transistor Q42 is connected to control circuit 42 via resistor R44.

In this embodiment, as an example of the SW controller 412, S-8338 manufactured by ABLIC Inc. is used. The SW controller 412 is connected to both ends of a capacitor C46 to which a control voltage Vs1 is applied, and uses the control voltage Vs1 as an operating power source. SW controller 412 is connected to the collector of transistor Q42 and monitors collector voltage Vc2 of transistor Q42. If the collector voltage Vc2 is at the L level, the SW controller 412 maintains the transistor Q41 in the off state and stops the boosting operation of the battery voltage Vb. If collector voltage Vc2 is at H level, SW controller 412 turns transistor Q42 on and off to boost battery voltage Vb. The SW controller 412 that performs the boost operation acquires the voltage across the resistor R48 as the detected value of the load current via the resistor R47, and turns on and off the transistor Q41 so that the value of the load current matches the target current value.

A series circuit of a resistor R45 and a capacitor C45, a capacitor C44, and a resistor R46 are further connected to the SW controller 412. The series circuit of resistor R45 and capacitor C45 is an element for output phase compensation of the error amplification circuit inside SW controller 412. The capacitor C44 is an element for setting a delay time for short circuit protection. The resistor R46 is an element for setting the oscillation frequency.

Then, the control circuit 42 outputs a control signal Y3, and controls the operation of the lighting circuit 41 using the control signal Y3. The control signal Y3 is a binary voltage signal that uses a voltage value as an output level and can switch the voltage value to either an L level (first level) or an H level (second level). Control signal Y3 is transmitted to the base of transistor Q42 via resistor R44, and then transmitted to the base of transistor Q44 via resistor R411. In the following description, the control signal Y3 whose output level is L level may be referred to as the L level control signal Y3, and the control signal Y3 whose output level is H level may be referred to as the H level control signal Y3. be.

FIG. 6 is a time chart showing the waveforms of the control signal Y3 and the collector voltage Vc2, and the states of the transistors Q42, Q43, and Q44.

The control circuit 42 controls the control signal Y3 to the H level during the normal period Ta2 in which the power outage detection circuit 46 does not detect a power outage. When the control signal Y3 is at the H level, the transistor Q42 is turned on and the collector voltage Vc2 of the transistor Q42 becomes the L level. Further, transistor Q44 is turned on and transistor Q43 is turned off. Since the collector voltage Vc2 is at the L level, the SW controller 412 maintains the transistor Q41 in the off state and stops the boosting operation of the battery voltage Vb. Further, the current path from the light source 2 to the negative electrode of the capacitor C42 is cut off by the transistor Q43 which is in an off state. Therefore, during the normal period Ta2, the light source 2 is turned off.

Further, the control circuit 42 controls the control signal Y3 to the L level during the power outage period Tb2 during which the power outage detection circuit 46 detects a power outage. When the control signal Y3 is at the L level, the transistor Q42 is turned off and the collector voltage Vc2 of the transistor Q42 becomes the H level. Furthermore, transistor Q44 is turned off and transistor Q43 is turned on. Therefore, the current path from the light source 2 to the negative electrode of the capacitor C42 is conducted by the transistor Q43 in the on state. Since the collector voltage Vc2 is at the H level, the SW controller 412 turns on and off the transistor Q41 to boost the battery voltage Vb and make the value of the load current match the target current value. As a result, during the power outage period Tb2, a load current flows through the light source 2, and the light source 2 lights up.

As described above, when the control circuit 42 controls the control signal Y3 to the L level, the lighting circuit 41 causes a load current using the emergency voltage Vd3 as a power source to flow through the light source 2. On the other hand, when the control circuit 42 controls the control signal Y3 to the H level, the lighting circuit 41 turns off the light source 2. That is, the control circuit 42 controls the control signal Y3 to the L level at the time of a power outage of the external power supply 9, at the time of regular inspection, at the time of emergency lighting confirmation, and at the time of user inspection. Further, the control circuit 42 controls the control signal Y3 to the H level unless there is a power outage of the external power supply 9, a periodic inspection, an emergency lighting confirmation, or a user inspection.

Here, there is a possibility that the control signal Y3 will not be output normally due to an abnormality in the control circuit 42 or the like. For example, due to electrostatic damage in the output stage of the control circuit 42, an abnormality may occur in which the control signal Y3 is fixed at L level and does not switch to H level.

Therefore, the lighting circuit 41 is configured to cause a load current using the emergency voltage Vd3 as a power source to flow through the light source 2 when receiving the L level control signal Y3. Therefore, even if at least one of the control signals Y3 is fixed at the L level due to an abnormality in the control circuit 42 during a power outage of the external power supply 9, the lighting circuit 41 can transmit the load current using the emergency voltage Vd3 to the light source 2. can be passed to. As a result, the lighting device 4 can light the light source 2 even if an abnormality occurs in the control circuit 42 during a power outage.

Note that the control signal Y3 may be a current signal whose output level is a current value. In this case, the control signal Y3 becomes a binary current signal whose current value can be switched to either an L level (first level) or an H level (second level).

(5) First Abnormality Detection of Control Circuit Preferably, the control circuit 42 includes an abnormality detection circuit 422. The abnormality detection circuit 422 detects an abnormality in the control circuit 42 if the output level of at least one of the control signals Y1 and Y2 or the control signal Y3 is different from the output level indicated by the data in the control circuit 42. The output level indicated by the data in the control circuit 42 is the control signal Y1 and Y2 indicated by the calculation results of the lighting control circuit 421 and the inspection control circuit 424, or the control signal Y3 on the software executed by the control circuit 42. are each output level. The control circuit 42 normally controls the actual output level of the control signals Y1 and Y2 or the control signal Y3 so that the output level is indicated by the calculation result on the software.

The abnormality detection circuit 422 then compares the output level indicated by the calculation result on the software with the actual output level of the control signals Y1 and Y2 or the control signal Y3 actually output from the control circuit 42. The abnormality detection circuit 422 detects at least one of the control signals Y1 and Y2 that is actually output even though the control signals Y1 and Y2 or the control signal Y3 is at H level as the output level indicated by the calculation result on the software. Alternatively, if the control signal Y3 is at L level, an abnormality in the control circuit 42 is detected.

When the abnormality detection circuit 422 detects an abnormality in the control circuit 42, the control circuit 42 outputs the L level control signals Y1 and Y2 or the L level control signal Y3, regardless of the output level indicated by the calculation result on the software. Perform output control to output.

In the notification circuit 43, when the abnormality detection circuit 422 detects an abnormality in the control circuit 42, the drive circuit 433 notifies the abnormality in the control circuit 42 by lighting or blinking the display element 431. Further, the drive circuit 433 may notify the abnormality of the control circuit 42 by outputting a sound from the sound generation section 432. The sound output by the sound generating unit 432 is, for example, a message "An abnormality in the control circuit 42 has been detected" notifying an abnormality in the control circuit 42, or a buzzer sound. In this embodiment, the abnormality notification of the control circuit 42 refers to a notification that notifies a person that the control circuit 42 is abnormal and prompts the person to take a response.

(6) Second abnormality detection of control circuit When the lighting device 4 includes the lighting circuit 41 of the second specific example shown in FIG. The device may further include an oscillation circuit that generates an oscillation signal that alternately repeats. In this case, when setting the control signal Y3 to the H level, the control circuit 42 generates the H level control signal Y3 by superimposing the H level signal on the L section of the oscillation signal. Furthermore, when setting the control signal Y3 to L level, the control circuit 42 connects the output end of the control signal Y3 to the circuit ground via a pull-down resistor or the like.

However, when the control circuit 42 is abnormal, the control circuit 42 cannot superimpose an H level signal on the L section of the oscillation signal. Therefore, when the control circuit 42 is abnormal, the control circuit 42 outputs the control signal Y3 that alternately repeats the L level and the H level even if it attempts to output the H level control signal Y3 according to the output pattern on the software. Put it away. As a result, the lighting circuit 41 supplies the load current to the light source 2 during the period when the control signal Y3 is at the L level, does not supply the load current to the light source 2 during the period when the control signal Y3 is at the H level, and flashes. If the control circuit 42 becomes abnormal when the external power supply 9 is energized (when there is no power outage), the control circuit 42 outputs a control signal Y3 that alternately repeats L level and H level, and the light source 2 blinks. do. The user can recognize an abnormality in the control circuit 42 by seeing the light source 2 blinking when the external power source 9 is energized.

(7) Output terminal of control circuit The control circuit 42 includes three output terminals that output control signals Y1, Y2, and Y3, respectively. FIG. 7 shows the configuration of the output end P1 as an example of the output end. The output terminal P1 is an output port for the control signal Y0, and the control signal Y0 is one of the above-mentioned control signals Y1, Y2, and Y3. The output end P1 is connected (electrically connected) to the circuit ground G51 via a resistor R51. Further, the output terminal P1 is connected to the first end of the switch SW51, and the potential at the second end of the switch SW51 becomes the positive potential of the control voltage Vs2. Then, the control circuit 42 turns on the switch SW51 when setting the control signal Y0 to the H level, and turns off the switch SW51 when setting the control signal Y0 to the L level.

Here, if the switch SW51 is a transistor, the transistor may have an open failure due to electrostatic discharge damage or the like, and the control signal Y0 may be fixed at the L level. Further, if the switch SW51 is a mechanical relay or the like, the mechanical relay may open and fail due to a failure of a mechanical contact, and the control signal Y0 may be fixed at the L level.

However, as described above, even if the control signal Y0 (control signals Y1, Y2, Y3) is fixed at the L level, the lighting circuit 41 supplies the light source 2 with a load current using the emergency voltage Vd2 or Vd3 as the power source. It can flow. As a result, the lighting device 4 can light the light source 2 even if an open failure occurs in the switch SW51 of the control circuit 42 during a power outage.

(8) Structure of disaster prevention lighting fixture The structure of the disaster prevention lighting fixture 1 including the lighting device 4 will be described below with reference to FIGS. 8A to 8C. The disaster prevention lighting device 1 according to the present embodiment is attached to construction materials such as ceiling materials and wall materials, for example, and irradiates illumination light onto evacuation passages and the like in the event of a power outage.

The disaster prevention lighting device 1 includes a main body 10, a cover 11, and a pair of supports 12, as shown in FIGS. 8A to 8C.

As shown in FIGS. 8A and 8B, the main body 10 is formed into a cylindrical shape with one bottom (lower surface) open. A pair of supports 12 are attached to the side surfaces of the main body 10. An annular flange 100 is formed at the lower end of the main body 10 and projects outward.

The pair of supports 12 is formed into a long leaf spring shape, as shown in FIGS. 8A to 8C. Each support 12 is fixed to the side surface of the main body 10 at one end in the longitudinal direction, and is configured such that the other end in the longitudinal direction can be bent in a direction (upward) approaching the bottom surface (top surface) of the main body 10. . That is, the main body 10 is installed on the ceiling by sandwiching the ceiling material between a pair of supports 12 inserted into a hole provided in the ceiling and a flange 100 provided on the lower end surface of the main body 10. supported by wood.

As shown in FIGS. 8A to 8C, the cover 11 is formed into a disk shape that is larger in outer diameter than the flange 100 of the main body 10. As shown in FIGS. As shown in FIG. 8B, a circular window hole 110 is provided in the center of the cover 11. The lens 21 of the light source unit 2U passes through the window hole 110. A pair of attachment springs are attached to the cover 11. As shown in FIG. 8C, the cover 11 is held on the main body 10 by a pair of attachment springs while closing the bottom surface of the main body 10.

A lighting device 4 (see FIG. 1), a light source 2 (see FIG. 1), and a battery 3 (see FIG. 1) are attached to the main body 10. More specifically, as shown in FIG. 8B, the light source unit 2U, battery unit 3U, and lighting unit 4U are housed in the main body 10. However, the battery unit 3U is housed in the main body 10 so that it can be inserted and removed through the opening on the bottom surface of the main body 10.

The light source unit 2U includes an LED module 20 and a lens 21, as shown in FIG. 8B. The LED module 20 has a substrate on which the light source 2 is mounted, and when a voltage is applied in the forward direction, it emits white illumination light such as white, neutral white, or daylight color. The lens 21 is arranged in front of (below) the LED module 20 and collects light emitted from the LED module 20.

The battery unit 3U shown in FIG. 8B includes a battery 3 (see FIG. 1) including a plurality of unit cells and a battery case that houses the battery 3. The battery 3 is, for example, a nickel-hydrogen storage battery or a nickel-cadmium storage battery. The battery case is formed into a box shape made of an electrically insulating material such as synthetic resin, and accommodates a plurality of unit cells therein.

The lighting unit 4U shown in FIG. 8B includes the lighting device 4 (see FIG. 1). Light emitted from the monitor lamp 48 of the lighting device 4 is emitted to the front (downward) of the cover 11 through a first hole 111 provided in the cover 11. The receiving unit 47 receives (receives) a wireless signal through the second hole 112 provided in the cover 11 . Light emitted from the display element 431 of the notification circuit 43 is emitted to the front (downward) of the cover 11 through the third hole 114 provided in the cover 11. The push buttons of the three push button switches 49A, 49B, and 49C are arranged so as to face each of the three operation holes 113 provided in the cover 11.

(9) Disaster Prevention Lighting System FIG. 9 shows the configuration of the disaster prevention lighting system B1 of this embodiment. The disaster prevention lighting system B1 includes a plurality of disaster prevention lighting fixtures 1.

In the disaster prevention lighting system B1, each of the plurality of disaster prevention lighting fixtures 1 has a communication function. The lighting device 4 further includes a communication circuit (not shown) connected to the communication line 8, and the communication circuit transmits and receives signals via the communication line 8. The communication circuit transmits and transmits signals in accordance with a wired LAN (Local Area Network) such as Ethernet (registered trademark) or a standard such as RS-485 (for example, IEEE 802.3 or RS-485). Preferably, the signal is received. Therefore, each lighting device 4 of the plurality of disaster prevention lighting devices 1 communicates via the communication line 8, and the control circuit 42 can exchange data with other lighting devices 4.

For example, each notification control circuit 423 of the plurality of lighting devices 4 receives data regarding the inspection timing of the other lighting device 4 (each data such as the next periodic inspection timing and delay time) from the control circuit 42 of the other lighting device 4. ) to obtain. Therefore, each notification control circuit 423 of the plurality of lighting devices 4 can set the periodic inspection timing of its own device so that the periodic inspection timing of its own device does not overlap with the periodic inspection timing of other lighting devices 4.

Further, each notification control circuit 423 of the plurality of lighting devices 4 may transmit data regarding the periodic inspection timing of its own device by multicast or broadcast. In this case, each of the plurality of lighting devices 4 can easily acquire each data regarding the periodic inspection timing of the other lighting devices 4.

Further, each notification control circuit 423 of the plurality of lighting devices 4 may periodically transmit a data request to other lighting devices 4 by multicast or broadcast. The notification control circuit 423 that has received the data request returns data regarding the periodic inspection timing of its own device to the lighting device 4 that has transmitted the data request.

Further, the communication circuit of the lighting device 4 may transmit and receive signals by wireless communication. For example, the communication circuit may transmit signals in accordance with standards such as wireless LAN, BLUETOOTH (registered trademark), or ZIGBEE (registered trademark) (e.g., IEEE 802.11, IEEE 802.15.1, or IEEE 802.15.4). and receive signals. In this case, the communication line 8 becomes unnecessary in the disaster prevention lighting system.

Therefore, each of the plurality of lighting devices 4 included in the disaster prevention lighting system B1 can grasp the periodic inspection timing of the other lighting devices 4, and can prevent the periodic inspection timing of its own device from overlapping with the periodic inspection timing of the other lighting devices 4. can be set flexibly.

(10) Summary The lighting device (4) of the first aspect according to the above-described embodiment includes a lighting circuit (41) and a control circuit (42). The lighting circuit (41) executes emergency lighting to light the light source (2) using emergency power supplied from the battery (3) when the external power source (9) is stopped. The control circuit (42) controls the lighting circuit (41) by outputting control signals (Y0, Y1, Y2, Y3) to the lighting circuit (41). The control circuit (42) outputs control signals (Y0, Y1, Y2, Y3) capable of switching the output level to at least a first level (L level) and a second level (H level) higher than the first level. , when the control circuit (42) is abnormal, at least part of the control signals (Y0, Y1, Y2, Y3) is set to the first level. The lighting circuit (41) executes emergency lighting when receiving the first level control signals (Y0, Y1, Y2, Y3), and executes emergency lighting when receiving the second level control signals (Y0, Y1, Y2, Y3). , do not turn on the emergency lights.

The lighting device (4) described above can light the light source (2) even if an abnormality occurs in the control circuit (42) during a power outage.

Moreover, it is preferable that the lighting device (4) of the second aspect according to the embodiment further includes an abnormality detection circuit (422) that detects an abnormality of the control circuit (42) in the first aspect. If the abnormality detection circuit (422) detects an abnormality in the control circuit (42) at least when the external power supply (9) is stopped, the control circuit (42) sends a control signal (Y0) so that the output level becomes the first level. , Y1, Y2, Y3).

The lighting device (4) described above can light the light source (2) even if an abnormality occurs in the control circuit (42) during a power outage.

Further, in the lighting device (4) of the third aspect according to the embodiment, in the second aspect, the abnormality detection circuit (422) is configured such that the output level of the control signal (Y0, Y1, Y2, Y3) is If the output level differs from the data shown in (42), it is preferable to detect an abnormality in the control circuit (42).

The lighting device (4) described above can easily detect an abnormality in the control circuit (42).

Further, in the lighting device (4) of the fourth aspect according to the embodiment, in the first aspect, the control circuit (42) alternately switches between the first level and the second level when the control circuit (42) is abnormal. It is preferable to output control signals (Y0, Y1, Y2, Y3) that are repeated.

The above-mentioned lighting device (4) can notify abnormality of the control circuit (42) by blinking the light source (2).

Further, in the lighting device (4) of the fifth aspect according to the embodiment, in any one of the first to fourth aspects, the control circuit (42) receives the control signal (Y0, Y1, Y2, Y3). It has an output end (P1) that outputs. It is preferable that the output end (P1) is connected to ground (G51) via a resistor (R51).

The lighting device (4) described above can output a first level control signal (Y0, Y1, Y2, Y3) when the output stage of the control circuit (42) is abnormal.

Further, the disaster prevention lighting device (1) of the sixth aspect according to the embodiment includes the lighting device (4) of any one of the first to fifth aspects, a light source (2), a battery (3), A main body (10). The light source (2) is lit by the output of the lighting device (4). The battery (3) supplies the lighting device (4) with emergency power for lighting the light source (2). A lighting device (4), a light source (2), and a battery (3) are attached to the main body (10).

The above-described disaster prevention lighting device (1) can turn on the light source (2) even if an abnormality occurs in the control circuit (42) during a power outage.

Moreover, the disaster prevention lighting system (B1) of the seventh aspect according to the embodiment includes a plurality of disaster prevention lighting fixtures (1) of the sixth aspect.

The above-described disaster prevention lighting system (B1) can turn on the light source (2) even if an abnormality occurs in the control circuit (42) during a power outage.

1 Disaster prevention lighting equipment 2 Light source 3 Battery 4 Lighting device 41 Lighting circuit 42 Control circuit 421 Lighting control circuit 422 Abnormality detection circuit 424 Inspection control circuit 43 Notification circuit 9 External power supply 10 Main body Y0, Y1, Y2, Y3 Control signal P1 Output terminal R51 Resistor G51 Circuit ground (ground)
B1 Disaster prevention lighting system

Claims (5)

a lighting circuit that executes emergency lighting that lights up the light source with emergency power supplied from a battery when the external power supply stops;
a control circuit that controls the lighting circuit by outputting a control signal to the lighting circuit;
an abnormality detection circuit that detects an abnormality in the control circuit,
The control circuit outputs the control signal whose output level can be switched to at least a first level and a second level higher than the first level, and when the control circuit is abnormal, at least a part of the control signal is output to the second level. 1 level,
The lighting circuit executes the emergency lighting when receiving the control signal at the first level, and does not execute the emergency lighting when receiving the control signal at the second level;
If the abnormality detection circuit detects an abnormality in the control circuit at least when the external power supply is stopped, the control circuit controls the control circuit so that the output level of at least a portion of the control signal becomes the first level. control the signal,
The abnormality detection circuit compares the output level of the control signal with an output level indicated by data in the control circuit, and determines whether the output level of the control signal is an output level indicated by data in the control circuit. If different, an abnormality in the control circuit is detected.
lighting device. The control circuit outputs the control signal that alternately repeats the first level and the second level when the control circuit is abnormal.
The lighting device according to claim 1. The control circuit has an output end that outputs the control signal,
The output end is connected to ground via a resistor.
The lighting device according to claim 1 or 2. The lighting device according to any one of claims 1 to 3,
a light source that is lit by the output of the lighting device;
a battery that supplies emergency power to the lighting device to light the light source;
A main body to which the lighting device, the light source, and the battery are attached.
Disaster prevention lighting equipment characterized by: A plurality of disaster prevention lighting devices according to claim 4 are provided.
A disaster prevention lighting system characterized by:

Images