KR20120135824A - Lighting unit for emergency - Google Patents

Abstract

PURPOSE: An LED emergency light is provided to maintain a full-charged state of a battery by preventing damage to an operating circuit caused by unstable commercial power. CONSTITUTION: An interrupter switch(120) is connected with a power line between a rectifying unit(20) and a PFC unit(30). The interrupter switch supplies power outputted from the rectifying unit to the PFC unit. An overdischarge blocking unit(110) prevents the overdischarge of the power supplied to the PFC unit by sensing a voltage size of the power. The overdischarge blocking unit senses the overdischarge by sensing an output voltage of the rectifying unit. A UPS unit(200) includes a battery(210), a charging unit(220), a full-charged sensing unit(230), a power outage sensing unit(240), a discharge switch(250), a power outage alarm unit(260), and an overdischarge preventing unit(270). [Reference numerals] (10) Filter unit; (110) Overvoltage blocking unit; (20) Rectifying unit; (220) Charging unit; (230) Full-charging sensing unit; (240) Power outage sensing unit; (260) Power outage notifying unit; (270) Overdischarge preventing unit; (50) Smoothing unit; (60) Controller; (70) Feedback unit; (80) Constant-voltage unit

Description

LED emergency light

The present invention relates to an LED stand using LEDs having advantages such as environment-friendly, low power, high brightness, and semi-permanent lifespan as a light source, and includes a driving circuit and an LED by blocking a surge or overvoltage in a commercial power supply with an overvoltage protection means. The back light can be prevented from being damaged by unstable commercial power, and the charging unit for charging the battery is capable of generating charging power of various waveforms, and relates to an LED emergency light that can be efficiently charged regardless of the type of battery.

In general, emergency lighting which is turned on by a battery is installed in the passage of a public building in case of an emergency power outage.

Emergency lighting is not operated as usual, but only in an emergency, in the emergency is configured to automatically turn on by a sensor that operates a switch or detects a certain condition.

In addition, it is made of portable weight and small size so that it can be grasped in an emergency and lightly evacuated while evacuating.

Emergency lighting is normally supplied with external power (i.e. commercial power) at all times and lights up the LED to indicate that the external power is being supplied.Also, the external power is not applied to the light source module so that it is unnecessary. Prevent power consumption

In addition, even when power is not normally applied to the light source module, the emergency lighting is configured to be illuminated by a commercial power source by a user's operation when it is necessary to check whether the lighting is defective or to illuminate the surroundings.

In other words, the emergency lighting includes a power supply means for turning on the light source module with a commercial power source, in addition to the UPS means for turning on the light source module with battery power during a power failure.

In recent years, LEDs, which are environmentally friendly as light sources, consume less power, have a semi-permanent lifespan, and are illuminated with bright light (high brightness), have been spotlighted.

Accordingly, attempts are being made to use LED as a light source for emergency lighting.

Emergency lighting can be used to turn on the light source module with a commercial power source in normal times, and charge the battery to maintain a full state so that the light source module can be turned on for a certain period of time with battery power in an emergency.

By the way, commercial power is often included for a variety of causes, such as surge or overvoltage, and when commercial power including surge or overvoltage is supplied, the driving circuit that turns on the light source module and charges the battery is easily damaged by surge or overvoltage.

Therefore, when a commercial power supply including a surge or an overvoltage is supplied, it is necessary to block the driving circuit to prevent damage to the driving circuit, thereby preventing a situation in which an emergency light does not turn on when an emergency occurs.

In addition, in order to be turned on for a predetermined time even during a power failure, a rechargeable battery is built in. Various types of batteries, such as a lead storage battery, an alkaline storage battery, a gel type battery, a lithium storage battery, and a polymer storage battery, have been released.

These various types of batteries have different waveforms of charging power for charging. That is, the waveform of the charging power source suitable for being charged quickly and fully varies from battery to battery.

Therefore, it is necessary to keep the full state at all times even when using any kind of battery for emergency lighting, so that it is turned on for a sufficient time for emergency evacuation in case of emergency.

In addition, since the battery has the lowest charging voltage, when the voltage drops below the minimum charging voltage due to long-term discharge, the battery may not be charged even when the charging power is supplied.

Therefore, it is necessary to prevent the battery from being discharged below the minimum charging voltage, so that in case of an emergency situation, the battery is not charged so that a situation in which emergency lights cannot be utilized does not occur.

The present invention is an invention devised by the above problems and necessities, using an LED as a light source is an environmentally friendly, low power consumption, and thus can be illuminated for a long time, LED emergency lighting that can illuminate the surroundings more brightly For the purpose of providing

It is equipped with an overvoltage protection means to prevent the driving circuit from being damaged by the overvoltage or surge power of the commercial power supply, and the charging part which can generate various types of charging power waveforms to charge the battery quickly regardless of the type of battery. To prevent the battery from being over-discharged, and to prevent the battery from being overcharged to prevent a situation where the battery is not charged, and to prevent emergency lighting from occurring during an emergency situation. The purpose is to provide LED emergency lighting that can be prevented.

LED emergency lighting according to the present invention for achieving the above object

A housing having a grippable handle;

A protruding head connected to the upper part of the enclosure and capable of changing a direction;

A light source module mounted inside the head and including an LED;

A driving circuit embedded in the enclosure and including a lighting means for converting commercial power into a lighting power and supplying the light source module to the light source module, and a UPS means for supplying lighting power to the light source module when the commercial power is interrupted. In LED emergency lighting,

The lighting power supply means

Filter unit for removing the noise of the input commercial power,

A rectifier for rectifying the output power of the filter unit;

A PFC unit for power factor correction of the output power of the rectifier unit;

A PWM unit for switching the output power of the PFC unit and supplying it to a transformer;

Smoothing unit for supplying the lighting power to the light source module by smoothing the output power of the transformer,

A controller for controlling switching of the PWM unit;

A feedback unit for feeding back the output power of the smoothing unit to the controller;

And a constant voltage unit supplying driving power to the controller by converting the output power of the PFC unit into a constant voltage,

The UPS means

With battery,

A charging unit controlled by the controller and configured to charge the battery with power supplied from the constant voltage unit;

A full detection unit which senses the state of charge of the battery and transmits it to the controller;

Power failure detection unit for detecting whether the commercial power is cut off,

A discharge switch for discharging the battery when the power failure detecting unit detects a block of commercial power;

A power failure notification unit which lights up when the battery is discharged to indicate the power failure;

When the charge voltage of the battery is discharged to the reference minimum voltage or less, it characterized in that it comprises an over-discharge protection for blocking and protecting the discharge.

And between the rectifying unit and the PFC unit

Shutdown switch to supply or cut off commercial power by turning on / off power line,

And an overvoltage protection means including an overvoltage cut-off part which senses an output power of the rectifier and protects a driving circuit by turning off the cutoff switch in the event of an overvoltage.

The overvoltage cutoff part

A capacitor for smoothing the output power of the rectifier;

A distribution resistor for voltage-sharing the voltage of the capacitor;

A detection switch detecting whether an overvoltage is detected by comparing the voltage divided by the distribution resistor with a reference voltage;

A photocoupler driven when the sensing switch senses an overvoltage;

A control switch for turning off the photoelectric switch when the photocoupler is driven;

It characterized in that it comprises a regulator for supplying a driving power to the photocoupler,

The charging unit

A first transistor configured to switch output power of the constant voltage unit to generate precharge power;

A second transistor for switching the preliminary charging power supplied from the first transistor and flowing a portion of the preliminary charging power to ground to generate a complete charging power;

A capacitor to smooth the completed charging power outputted between the first and second transistors;

An inductor for removing the overshoot included in the charging power output by the capacitor;

And a rectifying diode for rectifying the charging power of the inductor and applying the same to the battery.

The over discharge prevention unit

A third transistor provided at an output line of the battery and on or off to discharge or cut off the battery charging power;

A comparator for comparing and amplifying a charging voltage of the battery and a reference minimum voltage;

And a fourth transistor that is turned on and off by an output signal of the comparator and turns on the third transistor as it is turned off.

LED emergency lighting according to the present invention having such a configuration is possible to prompt evacuation by brightly illuminating the surroundings during power outages in the event of an emergency at night to prevent the expansion of accidents, to reduce the damage to life,

By using high brightness, low power consumption LED as light source, it can illuminate the surroundings brighter and longer for safe and quick evacuation,

It is about LED emergency lighting which prevents damage to the driving circuit by unstable commercial power and keeps the battery fully charged at all times, thereby minimizing the occurrence of inability to use emergency lighting in case of emergency. It is a very useful invention.

1 is a perspective view of the LED emergency light according to an example of the present invention.
2 is a block diagram of a driving circuit used in the present invention.
3 is a specific circuit diagram of a lighting power supply means in a driving circuit;
4 is a specific circuit diagram of overvoltage protection means in a driving circuit.
5 is a specific circuit diagram of the UPS means in the driving circuit.

Hereinafter, an LED stand having a UPS unit according to the present invention will be described in more detail with reference to FIGS. 1 to 5.

First, as shown in Figure 1, the mechanical configuration of the LED emergency light according to the present invention is provided with a housing (1), a handle (3) provided on the housing to be portable, protruding to the upper portion of the housing, the head capable of changing direction (5) is made.

The head is provided with a light source module 7 for emitting light and illuminating, and the housing 1 has a drive circuit 9 for lighting an LED of the light source module 7.

It is installed on the wall surface of the enclosure 1 and protects the drive circuit 9 and the like embedded therein.

The outer surface of the enclosure 1 is provided with various switches (SW) for the user's operation, and the LED (LED1, LED 260, etc.) for indicating and indicating whether the input of the commercial power source and power failure.

The head 5 is protruded and connected to an upper portion of the housing 1, and protects the light source module 7 therein. And the front of the head 5 is made of a transparent cover so that the light emitted from the LED (7a) of the light source module 7 can be transmitted.

The head 5 is capable of changing the direction (that is, can be rotated in a certain range to the left and right, and can be flipped up and down in a certain range) to be illuminated in the place to be illuminated regardless of the installation place.

The light source module 7 includes a PCB 7b and a plurality of LEDs 7a mounted on the PCB 7b. As the LED 7a, it is preferable to use a chip LED emitting light with high brightness and a wide irradiation angle.

The driving circuit 9 is embedded in the housing 1 and electrically connected to the light source module 7 embedded in the head 5, and converts a commercial power source or a discharge power of a battery into a lighting power source. The LED 7a is turned on by supplying it to the module 7.

As shown in FIG. 2, the driving circuit 9 includes a lighting power supply means 10 to 80, an overvoltage protection means 100, and a UPS means 200.

The lighting power source means 10 to 80 converts the discharge power of the commercial power source or the battery into the lighting power source and supplies the light source module 7 to light the LED 7a.

As shown in FIGS. 2 and 3, the lighting power supply unit 10 to 80 includes a filter unit 10, a rectifying unit 20, a PFC unit 30, a PWM unit 40, a smoothing unit 50, The controller 610, the feedback unit 70, and the constant voltage unit 80 are included.

In addition, an LED (LED1) indicating and indicating whether or not commercial power is being supplied is connected to the input side of the PFC unit 30, and between the PFC unit 30 and the PWM unit 40, commercial power is the light source module. A switch SW is provided for allowing a user to select what is supplied to (7). The switch SW is normally in an off state, but is turned on by a user operation to turn on the light source module 7 for testing or when it is necessary to light the light source module 7 with a commercial power source.

The filter unit 10

A fuse (F10) which is cut off when an instantaneous overvoltage or overcurrent is included in the input commercial power, and protects the driving circuit (9),

A surge observer (TNR10) which is kept open under a certain voltage but shorted in a surge power supply above a certain voltage,

An arrester (A10) connected in series with the surge observer (TNR10), when the surge observer (TNR10) is shorted and a surge power supply flows into the ground to remove it;

Line filters LF11 and LF12, which are composed of two coils wound in opposite directions, cancel each other's in-phase component noise from the commercial power input and cut off high frequency components;

Band extension capacitors C11 and C12 connected to both sides of the line filters LF11 and LF12 so that the line filters LF11 and LF12 can remove noise in a wider frequency band.

Including a pair of electromagnetic wave removal capacitor (C13, C14) connected in parallel to the output side of the line filter (LF11, LF12), the middle point is grounded, to remove the electromagnetic noise generated due to the AC characteristics of the commercial power source Is done.

The rectifier 20 used bridge diodes D21 to 24 to rectify and rectify the commercial power that passed through the filter unit 10.

The PFC unit 30 compensates for the power factor by matching the phase of the voltage and current of the commercial power rectified through the rectifying unit 20. More specifically, the power factor is compensated by making the waveform connecting the maximum value of the rectifier 20 output current equal to the period of the rectifier 20 output voltage and proportional in magnitude.

The PFC unit 30 includes a smoothing capacitor C31 for smoothing the output power of the rectifying unit 20,

A resistor (R31) for detecting an output voltage waveform of the rectifier 20 and transmitting it to the control unit U30;

A zero point detection inductor (L30) consisting of a primary winding through which the output current of the rectifier 20 flows in, and a secondary winding which senses a zero point of the current flowing into the primary winding and transmits it to the control unit U30. Wow,

A power factor improving transistor (Q30) for switching the output power passing through the inductor (L30) so as to form a waveform in which the maximum value of the output current is equal to the output voltage and a period in proportion to the output voltage;

A diode D30 for rectifying the output power of the power factor improving transistor Q30;

A rush current limiting resistor TH1 for blocking an inrush current when the output power of the diode D30 is included;

Smoothing capacitors C32 and C33 for smoothing and directing the output power of the diode D30;

An output voltage sensing resistor R34 for sensing an output voltage of the PFC unit 30, an output current sensing resistor R33 for sensing an output current and protecting an overcurrent from flowing into the transistor Q30;

The power factor is compensated by controlling the switching of the transistor Q30 by receiving the waveform of the input voltage input to the PFC unit 30 and the zero point of the input current, and inputting the output voltage and output current of the PFC unit 30. And a control unit U30 for controlling the switching of the transistor Q30 so that no overvoltage or overcurrent is thrust.

The PWM unit 40 supplies the switched pulse power to the primary winding of the transformer T1 by switching the output power of the PFC unit 30 in a PWM manner.

The PWM unit 40 includes two switching transistors Q41 and Q42, and the switching is controlled so that the duty ratio of the pulse power output by the controller 60 is adjusted to output a constant current (or constant voltage).

The transformer T1 steps down (or boosts) the pulse power input to the primary winding according to the winding ratio and outputs it through the secondary winding.

The smoothing unit 50 rectifies and smoothes the pulsed power output from the transformer T1 and converts the pulsed power into DC power to supply the light source module 7.

The smoothing unit 50 is a bead (FB51, Ryu 52) for removing noise of the output power of the transformer (T1),

Diodes (D51, D52, D53, D54) and capacitors (C51, C52) for rectifying and smoothing the output power of the beads (FB51, stream 52),

The smoothing unit 50 includes a ripple cancellation inductor L51 for removing ripple from the output current, and noise removing inductors L52 and L53 for removing noise.

The controller 60 controls the driving circuit 9 as a whole. More specifically, the PWM unit receives the driving power supplied through the constant voltage unit 80 and receives the magnitude of the output power current (or voltage) of the smoothing unit 50 from the feedback unit 70. By controlling the switching of the 40 so that the constant current (or constant voltage) is supplied to the light source module 7, and receives the magnitude of the charge voltage of the battery 210 from the full detection unit 230 of the UPS means 200 The switching of the 220 is controlled to allow the battery to be full, and the switching of the charging unit 220 is controlled to supply the battery 220 with the charging power having a waveform suitable for the type of the battery according to a preset program.

The controller 60 is

A microcomputer U60 that receives various signals and analyzes the received signals and outputs command signals according to a predetermined program;

A plurality of resistors (R61 ~ 68), a plurality of capacitors (C61 ~ 69) for the stable driving of the microcomputer (U60),

Transformer T60, resistors R601 to 603, capacitors C601 to 603, zener diodes ZD601 and ZD602 for transmitting switching command signals G1 and G2 to the PWM unit 40, and (for reference) Since the configuration for transmitting the command signals G3 and G4 to the charging unit 220 is similar to the above, it is not illustrated separately.)

A transistor Q60, a diode D61, a resistor R66, and a capacitor C68 for initial driving of the microcomputer U60 are included.

The feedback unit 70 controls the output current (or output voltage) of the smoothing unit 50 and the magnitude of the output current (or output voltage) input by the PWM unit 40 to the transformer T1. By feeding back to the), a constant current (or constant voltage) is continuously supplied to the light source module (7).

The feedback unit 70

A first resistor R71 for sensing an output current of the smoothing unit 50, a second resistor R72 for sensing an input current of the PWM unit 40, and

A first comparator CP71 which compares and amplifies the magnitude of the output current sensed by the first resistor R71 and a predetermined reference constant current;

A second comparator CP72 which compares and amplifies the input current sensed by the second resistor R72 and a set reference overvoltage;

A photodiode U70-A receiving the comparison result of the first comparator CP71;

A phototransistor U70-B which senses light emitted from the photodiode U70-A and transmits a voltage having a magnitude corresponding to the detected light amount to the controller 60;

The first comparator CP71 and the second comparator CP72 include resistors R701 to 703 and VR71 for setting a reference constant current and a reference overvoltage.

The constant voltage unit 80 converts the output power of the PFC unit 30 (discharge power of the battery in case of power failure) to supply driving power to the microcomputer U60 of the controller 60, and to the charging unit 220. Supply charging power.

The constant voltage unit 80 is a regulator U80 for stepping down and outputting the voltage input from the PFC unit 30 and outputting the resistor, and a resistor for rectifying, smoothing, and removing the output voltage of the regulator U80 (R81). 84), diodes D81 and 82, capacitors C81 to 84, and inductor L81.

Next, the overvoltage protection means 100 of the present invention will be described in more detail with reference to FIGS. 2 and 4.

The overvoltage protection means 100

A cut-off switch 120 connected to a power line between the rectifier 20 and the PFC unit 30 and supplying or cutting off the power output from the rectifier 20 to the PFC unit 30 by being turned on and off;

The voltage of the power output from the rectifier 20 is sensed, and if it is determined that the overvoltage is detected as a result of the over-voltage cutoff unit 120 to turn off the cutoff switch 120 so that the overvoltage is not supplied to the PFC unit 30. It is composed.

The cutoff switch 120 used a relay. That is, a relay is used, which is composed of a magnet switch (RS120) connected to a power line and operating on and off, and a driving coil (RC120) which turns off the magnet switch (RS120) by generating an electromagnetic force when power is input.

The protection coil L120 is connected in series to the driving coil RC120. The driving coil RC120 uses the output power of the rectifying unit 120 as a driving power. When the driving power is an overvoltage, the driving coil RC120 may be damaged. Therefore, the protection coil L120 divides the driving power supplied from the rectifier 20 to prevent the driving coil RC120 from being damaged.

The overvoltage blocking unit 110 detects whether the output voltage of the rectifying unit 20 is an overvoltage, and when the detection result is an overvoltage, driving power is supplied to the driving coil RC120 of the cutoff switch 120 so that the magnet switch ( Turn off RS120).

The overvoltage blocking unit 110 is a capacitor (C111) for smoothing and directing the thrust power of the rectifier 20, and

A plurality of distribution resistors R112 to 114 for voltage-distributing voltages across the capacitor C111;

A sensing switch U111 that is turned on when the divided voltage is greater than the reference voltage by comparing the voltage divided by the distribution resistors R112 to 114 with the reference voltage;

A photocoupler PC110 driven when the sensing switch U111 is turned on;

A control switch Q110 which is turned on when the port coupler PC110 is driven to supply the output power of the rectifier 20 to the driving coil RC120 as driving power;

It includes a regulator (U112) for supplying a driving power to the photocoupler (PC110).

In addition, the regulator U112 is supplied with the power supplied from the capacitor C111 through the resistor R111, and the overvoltage supplied through the resistor R111 through the zener diode ZD110 is more than a predetermined magnitude. Receive power.

In addition, the port coupler PC110 receives a photodiode PD110 that receives driving power from the regulator U112 and emits light when the sensing switch U111 is turned on, and an optical signal of the photodiode PD110 is input. The phototriac PT110 is turned on when the phase of the commercial power is changed, that is, immediately after the size of the commercial AC power becomes zero. The zero crossing circuit 111 which protects so that it may connect is connected.

Next, the UPS means (ie, the uninterruptible power supply means) according to the present invention will be described in more detail with reference to FIGS. 2 and 5.

The UPS means 200 is a means for discharging the charging power of the battery when the supply of commercial power is interrupted due to a power failure, such that the LED (7a) of the light source module 7 is turned on for a predetermined time, the battery 210, a charging unit 220, a full detection unit 230, an electrostatic detection unit 240, a discharge switch 250, an electrostatic notification unit 260, and an over-discharge prevention unit 270.

The battery 210 uses a rechargeable secondary battery, and the present invention includes a charging unit 220 for generating charging power of various waveforms, and thus, a lead acid battery, an alkaline battery, a lithium battery, a polymer battery, and a gel type Various kinds of storage batteries, such as storage batteries, can be used as the battery.

The battery 210 preferably has a charging capacity to evacuate with sufficient time in case of an emergency. It is desirable to have a charging capacity capable of lighting the light source module with the charging power of the battery for at least 1 hour.

The charging unit 220 charges the battery 210 with the power supplied from the constant voltage unit 80, and switches under the control of the controller 60 to supply charging power having a waveform suitable for the type of battery 210. Create

The charging unit 220 is

A first transistor Q221 for switching the output power of the constant voltage unit 80 to generate precharge power;

A second transistor (Q222) for switching the preliminary charging power supplied from the first transistor (Q221) and flowing a part thereof to the ground to generate a complete charging power;

Capacitors C221 and C222 that smooth the completed charging power generated by the second transistor Q222,

An inductor (L220) for removing the overshoot included in the charging power output from the capacitors C221 and C222;

It includes a rectification diode (D220) for rectifying the charging power of the inductor (L220) to supply to the battery 210.

The first transistor Q221 and the second transistor Q222 are switched under the control of the controller 60. That is, when the full charge detection unit 230 transmits a signal indicating that the battery 210 is not in a full state, the controller 80 drives the first and second transistors Q221 and Q222. In addition, in controlling the driving of the first and second transistors Q221 and Q222, the controller 80 switches the battery 210 to generate a charging waveform according to a predetermined program.

In the on state, the first transistor Q221 passes the output power of the constant voltage unit 80 as it is, and in the off state, the output power of the constant voltage unit 80 is completely shut off, and thus the width according to the on / off time is reduced. The square waves are generated as a preliminary charging power in the first transistor Q221 and output.

The second transistor Q222 outputs preliminary charging power output from the first transistor Q221 to the capacitors C221 and C222 in an off state, and outputs the first transistor Q221 in an on state. Part of the reserve charging power is discharged to ground. Thus, the capacitors C221 and C222 are supplied with the complete charging power by subtracting the power emitted by the second transistor Q222 from the preliminary charging power output by the first transistor Q221.

The fullness detecting unit 230 senses the state of charge of the battery 210, and transmits a signal to the controller 60 when the charging voltage of the battery is less than or equal to the reference full voltage so that charging is performed. For reference, the reference full voltage at which charging is performed is slightly smaller than the full voltage when the battery is actually full.

The power failure detection unit 240 is connected to the output terminal of the cutoff switch 120 of the overvoltage protection means 100, and the power is supplied or cut according to the on / off state of the cutoff switch to detect the power failure.

If the power failure detection unit 240 is detected that the commercial power is cut off and transmits it to the controller (60).

The discharge switch 250 is connected to the output line of the battery 210, and receives a control signal from the controller 60 received the fact of the power failure from the power failure detection unit 240 is turned on the power of the battery Allow discharge.

The power failure notification unit 260 is turned on when the discharge switch 250 is turned on and the battery 210 is discharged to notify the user of the power failure.

The power failure notification unit 260 is composed of an LED (LED 260) is turned on by the discharge power of the battery 210, and a protection resistor (R 260) to protect the LED (LED 260) to prevent the overcurrent is applied. The LED (LED260) is flashing to indicate the discharge, or a specific color (for example, red) is lit to inform the discharge.

The over-discharge prevention unit 270 stops discharging the battery 210 when the charging voltage of the battery falls below the reference minimum voltage due to continuous discharge, so that a situation in which the battery is not charged does not occur.

The over-discharge prevention unit 270 is

A third transistor Q271 provided at an output line of the battery 210 and configured to allow on or off to allow or block discharge of the battery;

A comparator (U270) for comparing and amplifying the charging voltage of the battery and a predetermined reference minimum voltage;

And a fourth transistor Q272 that is turned on and off by an output signal that is a comparison result of the comparator U270 and turns the third transistor on and off as it is turned off.

The comparator U270 outputs a low signal when the charge voltage of the battery sensed through the resistors R272 and R273 is less than the reference ultra low voltage, and the fourth transistor Q272 outputs a low signal from the comparator U270. Is turned off when the input signal is input, and the third transistor Q271 is turned off when the fourth transistor Q272 is turned off to block the discharge of the battery 210 by opening an output line of the battery.

In the above description of the present invention has been described with respect to the LED emergency light and the like configured with a specific structure and circuit diagram with reference to the accompanying drawings, the present invention can be variously modified and changed by those skilled in the art, such modifications and changes are the protection of the present invention Should be interpreted as being within the scope.

1: pedestal 3: prop
5 housing 7 light source module
9: drive circuit
10 filter unit 20 rectifying unit
30: PFC unit 40: PWM unit
50: smoothing part 60: controller
70: feedback unit 80: constant voltage unit
100: overvoltage protection means 110: overvoltage blocking unit
120: disconnect switch
200: UPS means 210: battery
220: charging unit 230: full detection unit
240: power failure detection unit 250: discharge switch
260: outage notification unit 270: over-discharge prevention unit

Claims (4)

A housing having a grippable handle;
A protruding head connected to the upper part of the enclosure and capable of changing a direction;
A light source module mounted inside the head and including an LED;
A driving circuit embedded in the enclosure and including a lighting means for converting commercial power into a lighting power and supplying the light source module to the light source module, and a UPS means for supplying lighting power to the light source module when the commercial power is interrupted. In LED emergency lighting,

The lighting power supply means
Filter unit for removing the noise of the input commercial power,
A rectifier for rectifying the output power of the filter unit;
A PFC unit for power factor correction of the output power of the rectifier unit;
A PWM unit for switching the output power of the PFC unit and supplying it to a transformer;
Smoothing unit for supplying the lighting power to the light source module by smoothing the output power of the transformer,
A controller for controlling switching of the PWM unit;
A feedback unit for feeding back the output power of the smoothing unit to the controller;
And a constant voltage unit supplying driving power to the controller by converting the output power of the PFC unit into a constant voltage,

The UPS means
With battery,
A charging unit controlled by the controller and configured to charge the battery with power supplied from the constant voltage unit;
A full detection unit which senses the state of charge of the battery and transmits it to the controller;
Power failure detection unit for detecting whether the commercial power is cut off,
A discharge switch for discharging the battery when the power failure detecting unit detects a block of commercial power;
A power failure notification unit which lights up when the battery is discharged to indicate the power failure;
LED emergency light, characterized in that it comprises an over-discharge prevention unit for blocking and protecting the discharge, when the charge voltage of the battery is discharged below the reference minimum voltage. The method of claim 1,
Between the rectifier and the PFC unit
Shutdown switch to supply or cut off commercial power by turning on / off power line,
LED overvoltage protection means comprising: an overvoltage protection means for detecting the output power of the rectifying unit and an overvoltage cutoff unit to protect the driving circuit by turning off the cutoff switch in the event of an overvoltage. The method of claim 2,
The overvoltage cutoff part
A capacitor for smoothing the output power of the rectifier;
A distribution resistor for voltage-sharing the voltage of the capacitor;
A detection switch detecting whether an overvoltage is detected by comparing the voltage divided by the distribution resistor with a reference voltage;
A photocoupler driven when the sensing switch senses an overvoltage;
A control switch for turning off the photoelectric switch when the photocoupler is driven;
LED emergency light, characterized in that it comprises a regulator for supplying a driving power to the photocoupler. The method according to any one of claims 1 to 3,
The charging unit
A first transistor configured to switch output power of the constant voltage unit to generate precharge power;
A second transistor for switching the preliminary charging power supplied from the first transistor and flowing a portion of the preliminary charging power to ground to generate a complete charging power;
A capacitor to smooth the completed charging power outputted between the first and second transistors;
An inductor for removing the overshoot included in the charging power output by the capacitor;
And a rectifying diode for rectifying the charging power of the inductor and applying the same to the battery.

The over discharge prevention unit
A third transistor provided at an output line of the battery and on or off to discharge or cut off the battery charging power;
A comparator for comparing and amplifying a charging voltage of the battery and a reference minimum voltage;
LED emergency light, characterized in that it comprises a fourth transistor to be turned on and off by the output signal of the comparator, the third transistor on and off as it is turned on and off.

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