WO2013120299A1

WO2013120299A1 - Emergency lighting circuit and emergency lighting system

Info

Publication number: WO2013120299A1
Application number: PCT/CN2012/072516
Authority: WO
Inventors: 刘益全
Original assignee: 深圳市讯宇创科技有限公司
Priority date: 2012-02-14
Filing date: 2012-03-19
Publication date: 2013-08-22
Also published as: CN102595726B; CN102595726A

Abstract

An emergency lighting circuit comprises an LED lamp panel module, a regulating management module, a control module, a power supply module and a dimming module. The power supply module is used for converting external alternating current to direct current required by the emergency lighting circuit, and a power supply output end is connected with the control module. The regulating management module is connected with the control module and used for supplying stable control voltage to the control module when the external alternating current is normally supplied. The control module is connected with the LED lamp panel module and used for supplying working voltage to the LED lamp panel module. An input end of the dimming module is connected with the output end of the power supply module, and an output end of the dimming module is connected with an input end of the LED lamp panel module, to regulate brightness of the LED lamp panel module. Also disclosed is an emergency lighting system. By using the present invention, in the case of a power off, an emergency lamp responds immediately to implement emergency lighting, and brightness of the lamp can be regulated according to application scenarios, thereby prolonging the service time of the emergency lamp.

Description

Emergency lighting circuit and emergency lighting system

The present invention relates to the field of electronic technology applications, and more particularly to an emergency lighting circuit and an emergency lighting system. Background technique

There are several ways to dim the existing lighting:

SCR dimming: The circuit itself reduces the conduction angle of the current. The circuit behind the thyristor cannot be designed to make the current waveform of the power inlet into a complete sine wave. SCR dimming The LED bulb must be equipped with some capacitive buffer circuit to avoid flickering when the bulb is dimmed. In addition, the surface of the thyristor dimmer is a power-saving and energy-saving device, which is not the case, because although the silicon-controlled dimmer can reduce the power consumption of the incandescent lamp, it does not mean that it can be used for dimming the LED bulb. Power saving. This is because LED bulbs are a small load on conventional silicon-controlled dimmers when dimming. However, the load is too small, which will make the silicon control component switch unstable, causing the LED bulb to flicker. To correct this flicker problem, add a dummy load or a bleeder resistor to the TRIAC dimming LED bulb. However, usually the drain resistor is dimmed and must consume 1W to 2W to effectively overcome the flicker problem.

Control dimming: Dimming the LED with an infrared remote control. Switching lights can be implemented, and continuous dimming with P doctors. The disadvantage is high cost, no uniform specifications, and can only be used in high-end residential buildings.

EZ dimming: EZ dimming can achieve four-speed dimming, 100%, 60%, 40%, 20%, can not achieve standby, if you want to achieve dimming and emergency, it is not perfect.

The traditional emergency light: the general emergency light is charged when there is electricity, and is discharged after the power is cut off. After the battery voltage is low, it is turned off. If the light is on, it can only be used after the battery is charged. Summary of the invention

The technical problem mainly solved by the invention is to provide an emergency lighting circuit and an emergency lighting system, which can be used not only as emergency lighting, but also can adjust the brightness of the lamp according to the application environment to realize the dimming effect, thereby prolonging the emergency. Lighting time, cost Low and energy saving.

In order to solve the above technical problems, a technical solution adopted by the present invention is:

The invention also discloses an emergency lighting circuit, which comprises: an LED light board module, an adjustment management module, a control module, and a power module and a dimming module;

The power module is configured to convert an external alternating current into a direct current required by the emergency lighting circuit, and the power output end is connected to the control module;

The adjustment management module is connected to the control module, and the adjustment management module is configured to provide a stable control voltage for the control module when the external AC power supply is normal;

The control module is connected to the LED light board module, and is configured to provide a working voltage for the LED light board module;

The input end of the dimming module is connected to the output end of the power module, and the output end of the dimming module is connected to the input end of the LED light board module to adjust the brightness of the LED light board module.

The dimming module includes a current limiting voltage regulator module, a switch detection module, a switching control module, and an output control module, where

The input end of the current limiting voltage regulator module is connected to the output end of the power module to provide a stable working voltage for the switching control module;

The input end of the switch detection module is connected to the output end of the power module, the output end of the switch detection module is connected to the input end of the switch control module, and is used for controlling the on/off of the switch control module; the output of the switch control module is connected to the output The input end of the control module is used to control the voltage of the output control module;

The output end of the output control module is connected to the output end of the power module, and the output end of the output control module is connected to the LED light board module for adjusting the voltage of the LED light board module.

The current limiting voltage regulator module includes a third diode and a fifth capacitor connected in parallel, a thirteenth resistor, an anode of the third diode is grounded, and one end of the thirteenth resistor is connected to the third diode The cathode of the tube is connected to the output end of the power module;

The switch detection module includes a second diode, a fifteenth resistor, a fourth triode, and a third filter circuit, the second diode is connected to the output end of the power module, and the cathode is passed through the fifteenth resistor Connected to the base of the fourth triode, the emitter of the fourth triode is grounded, the collector of the fourth triode is connected to the input of the switching control module, and the third filter circuit is connected to the The base of the four triodes;

The switching control module includes a control chip, and the control chip includes a first port, a second port, a third port, a fourth port, and a fifth port, and the first port of the control chip is connected as an input end of the switching control module. The switch detects the collector of the fourth transistor in the module, the second port of the control chip is grounded, and the fifth port of the control chip is connected to the power limiting end of the switching control module to be connected to the current limiting voltage regulator module. a capacitor, a third port and a fourth port of the control chip being connected to the output control module as an output of the switching control module; an eleventh resistor, the fourth port being connected to the twelfth resistor;

The output control module includes an eleventh resistor, a twelfth resistor, a fifth triode, a sixth capacitor, and a field effect transistor, and the eleventh resistor and the twelfth resistor are respectively connected to the switching control module Controlling the third port and the fourth port of the chip, the free ends of the two resistors are connected and connected to the base of the fifth triode, the collector of the fifth triode is grounded, and the emitter of the fifth triode is connected To the gate of the FET, one end of the sixth capacitor is grounded, and the other end is connected to the gate of the FET, and the drain of the FET is connected as an input of the output control module to the output of the power module The source of the FET is connected to the LED light panel module as an output of the output control module.

The control module includes a first processor, a first capacitor, and a first transistor, a first resistor, and a button;

The first processor includes first to fifth ports; one end of the first capacitor is connected to the first port of the first processor, and the other end of the first capacitor is connected to the fifth port of the first processor; The second port of the device is connected to the output end of the adjustment management module, the third port is connected to the ground after the button, and the fourth port is connected to the base of the first triode via the first resistor; the emitter of the first triode A first port connected to the first processor, and a collector connected to the LED light panel module.

The adjustment management module includes a protection circuit, a voltage stabilization circuit, a sampling circuit, a control circuit, and a first filter circuit;

An input end of the protection circuit is connected to a first output end of the power module, an output end of the protection circuit is connected to an input end of the voltage stabilization circuit, and an output end of the voltage stabilization circuit is connected to an input end of the first filter circuit, An output end of the first filter circuit is connected to the sampling circuit At the sample end, an output end of the sampling circuit is an output end of the adjustment management module.

The protection circuit includes a second capacitor and a second resistor. The capacitor is a ceramic capacitor. The anode of the capacitor is connected to one end of the second resistor, the cathode of the capacitor is grounded, and the other end of the second resistor is connected to The input terminal of the voltage stabilizing circuit;

The voltage stabilizing circuit includes a second triode and a thyristor, a collector of the second triode is connected to a cathode of the second capacitor, a base is connected to a cathode of the thyristor, and an emitter is connected to the first processor of the control circuit a first port; an anode of the thyristor is grounded;

The sampling circuit includes a third resistor and a fourth resistor, one end of the third resistor is connected to the emitter of the second transistor, and the other end of the third resistor is grounded via the fourth resistor;

The first filter circuit includes a third capacitor, one end of the third capacitor is connected to a cathode of the second triode thyristor, and the other end of the third capacitor is connected to a gate level of the thyristor.

The adjustment management module further includes a red and green indicating circuit, wherein the red and green indicating circuit comprises an indicator circuit, a current limiting circuit, a second triode, a third triode, and fifth to seventh resistors;

One end of the fifth resistor is connected to the emitter of the third transistor, and the other end of the fifth resistor is connected to the green control end of the indicator circuit, and the input end of the current limiting circuit is connected to the emission of the third transistor The output terminal is connected to the base of the third transistor through the sixth resistor, and the collector of the third transistor is connected to the seventh resistor and then connected to the red control terminal of the indicator circuit.

The battery protection module further includes an external battery connection end and a power output end, wherein the battery protection module is configured to provide charging protection for the external battery when the external AC power is normally supplied, and to make the external battery when the power is off. The voltage is output to the outside through the power output.

The battery protection module includes a second processor, a third processor, and a second filter circuit;

The second processor includes first to fourth ports, and the third processor includes first and second ports;

The third port of the second processor is connected to the first port of the third processor, the fourth port of the second processor is connected to the second port of the third processor; the second port of the second processor is grounded; The input end of the second filter circuit is connected to the battery connection end, and the output end of the second filter circuit is connected to the first port of the second processor.

In order to solve the above problem, the present invention also provides an emergency lighting system, which is characterized in that it further includes a battery and a setting panel; the setting panel includes a timing signal output end, The control module further includes a timing signal input end; the timing signal output end of the setting panel is connected to the timing signal input end of the emergency lighting circuit control module, and is used for setting the working time, including delay, standby, and timing time; Connected to the battery connection end of the battery protection module, the battery is a rechargeable battery.

The beneficial effects of the technical solution:

The lighting circuit of the invention not only responds immediately when the power is off, but also plays the role of emergency lighting, and the user can adjust the brightness of the lamp according to the application, prolong the illumination time of the emergency lamp, the cost is low, the operation is convenient and the energy is saved. . The system application setting panel can flexibly set the working time of emergency lighting according to people's needs, and avoid waste of electric energy. The emergency lighting system is simple and reliable, and is widely used in occasions requiring lighting when power is off. DRAWINGS

1 is a block diagram showing the structure of an emergency lighting circuit according to an embodiment of the present invention;

2 is a structural block diagram of an emergency lighting system according to an embodiment of the present invention;

3A is a structural block diagram of a dimming module of an emergency lighting circuit according to an embodiment of the present invention; FIG. 3B is a circuit schematic diagram of a dimming module of an emergency lighting circuit according to an embodiment of the present invention; FIG. 4 is an emergency lighting circuit according to an embodiment of the present invention; FIG. 5 is a schematic diagram of an adjustment management module of an emergency lighting circuit according to an embodiment of the present invention; FIG. 6 is a schematic diagram of a battery protection module of an emergency lighting circuit according to an embodiment of the present invention; Schematic diagram of the power module of the emergency lighting circuit. detailed description

The detailed description of the technical contents, structural features, objects, and effects of the present invention will be described in detail below with reference to the embodiments. Please refer to FIG. 1 , which is a structural block diagram of an emergency lighting circuit according to an embodiment of the present invention. An emergency lighting circuit includes an LED light board module, an adjustment management module, a control module, and a power module and a dimming module; wherein the power module is configured to convert an external alternating current into a direct current required by the emergency lighting circuit The adjustment management module is connected to the control module, and the adjustment management module is configured to provide a stable control voltage for the control module when the external AC power is normally supplied; the control module is connected to the LED light panel module, and is used for the LED light board The module provides a working voltage; the input end of the dimming module is connected to the output end of the power module, and the output end of the dimming module is connected to the input end of the LED light board module to adjust the brightness of the LED light board module.

Referring to FIG. 2, an emergency lighting system according to an embodiment of the present invention, the emergency light system applying the emergency light circuit, further comprising a battery protection module, a battery, and a setting panel. The battery protection module has an external battery connection end and a power output end, and the power output end is connected to the control module, and the battery protection module is configured to provide charging protection for the external battery when the external AC power is normally supplied, and to enable the power supply when the power is off. The voltage of the external battery is outputted through the output end of the power supply; the setting panel includes a timing signal output end, and the control module further includes a timing signal input end; the timing signal output end of the setting panel and the timing of the emergency light circuit control module The signal input terminal is connected to set the working time, including the delay and the timing time; the battery is a rechargeable battery. The setting panel can set the delay, standby and timing working time of the emergency lighting system as needed. Specifically, the setting panel is a button module, and includes a time increasing button and a time reducing button, wherein the increasing or decreasing time button is fixed. When the time increase button is pressed, the delay time or working time can be increased. When the time is reduced, the delay time or working time is shortened. The purpose of applying the time setting function is to meet the needs of different groups. When the power is cut off, the time for the staff to apply the emergency lighting system to leave the site varies, so the time of leaving can be flexibly set according to needs, and the use is convenient. The drawback of wasting power in the prior art is overcome. The emergency lighting system is easy to install and is widely used in applications where lighting is required during power failure.

Please refer to FIG. 3A , which is a structural block diagram of an embodiment of a dimming module of the present invention. The modulating module includes a current limiting voltage regulator module, a switch detecting module, a switching control module, and an output control module, wherein the input end of the current limiting voltage regulator module is connected to the output end of the power module to provide a stable voltage for the switching control module. The switching control module output is connected to the output control module The input terminal is used to control the voltage of the output control module;

The input end of the output control module is connected to the output end of the power module to adjust the voltage of the LED board.

Please refer to FIG. 3B, which is a circuit schematic diagram of an embodiment of the dimming module of the present invention. The current limiting voltage regulator module includes a third diode D9 and a fifth capacitor C22 and a thirteenth resistor R30 connected in parallel. The anode of the third diode D9 is grounded, and one end of the thirteenth resistor R30 is connected to the third two. The cathode of the pole tube D9 is connected to the power output terminal N7; the output control module includes the eleventh resistor R33 and the twelfth resistor R34, the fifth transistor Q5, the sixth capacitor C24 and the field effect transistor connected in parallel Q4, the parallel eleventh resistor R33 and the twelfth resistor R34 are connected to the base of the fifth transistor Q5 through a diode, the collector of the fifth transistor Q5 is grounded, and the fifth transistor Q5 The emitter is connected to the gate of the FET Q4, the drain of the FET Q4 is connected to the output terminal N7 of the power module, and the source of the FET Q4 is connected to the LED panel module, the sixth One end of the capacitor C24 is grounded, and the other end is connected to the gate of the FET Q4. The switch detecting module includes a second diode D7, a fifteenth resistor R28, a fourth transistor Q6, and a resistor 2R9 and a capacitor C23. a third filter circuit, wherein the second diode D7 is connected to the power source The output terminals N6 and D7 of the module are connected to the base of the fourth transistor Q6 through the fifteenth resistor R28, the emitter of the fourth transistor Q6 is grounded, and the collector of the fourth transistor Q6 is connected to the switching control. The input end of the module, the third filter circuit is connected to the base of the fourth transistor Q6; the switching control module includes a control chip U7, the control chip U7 includes a first port, a second port, a third port, a fourth port, a fifth port, a collector of the fourth transistor Q6 is connected to the first port of the control chip U7, a second port of the control chip U7 is grounded, and a fifth port of the control chip U7 Connected to one end of a fifth capacitor connected to the eleventh resistor, the fourth port being connected to the twelfth resistor. Please refer to FIG. 4 , which is a schematic diagram of a control module of an emergency lighting circuit according to an embodiment of the present invention. The control module includes a first processor U6, a first capacitor C18 and a first transistor Q2, a first resistor R20 and a button; the first processor U6 includes first to fifth ports, and the first port passes the N5 Connecting the output end of the battery protection module; one end of the first capacitor is connected to the first port of the first processor U6, and the other end of the first capacitor C18 is connected to the eighth port of the first processor U6 and grounded; The fourth port of the processor U6 is connected to the output end of the adjustment management module through N2, the third port is connected to the ground after being connected to the button, and the sixth port is connected to the base of the first triode through the first resistor R20; An emitter of the pole tube is coupled to the first port of the first processor, and a collector is coupled to the LED light panel module.

Referring to FIG. 5, it is a schematic diagram of an adjustment management module of an emergency lighting circuit according to an embodiment of the present invention. The adjustment management module includes a protection circuit, a voltage stabilization circuit, a sampling circuit, a control circuit, and a first filter circuit; an input end of the protection circuit is connected to the first output end of the power module, and an output end of the protection circuit is connected to the voltage regulator An output end of the circuit is connected to an input end of the first filter circuit, an output end of the first filter circuit is connected to a sampling end of the sampling circuit, and an output end of the sampling circuit is The first output of the management module is adjusted.

Specifically, the protection circuit includes a second capacitor C16 and a second resistor R15. The capacitor is a ceramic capacitor. The anode of the capacitor is connected to one end of the second resistor R15. The cathode of the capacitor is grounded, and the second resistor R15. The other end is connected to the input end of the voltage stabilizing circuit; the voltage stabilizing circuit includes a second transistor Q1 and a thyristor TL1, and the collector of the second transistor Q1 is connected to the anode of the second capacitor C16, and the base is connected The cathode of the thyristor TL1, the emitter is connected to the first port of the first processor U6 of the control circuit; the anode of the thyristor TL1 is grounded.

Specifically, the sampling circuit includes a third resistor R16 and a fourth resistor R17. One end of the third resistor R16 is connected to the emitter of the second transistor Q1, and the other end of the third resistor is grounded through the fourth resistor R17. . The first filter circuit includes a third capacitor C17, one end of the third capacitor C17 is connected to the cathode of the thyristor TL1, the other end of the third capacitor is connected to the gate of the thyristor TL1, and the second transistor Q1 is connected through the N4. To the power module.

In a preferred embodiment, the adjustment management module further includes a red and green indicating circuit, where the red and green indicating circuit includes an indicator circuit, a current limiting circuit, a second transistor Q1, and a third a pole tube Q3 and fifth to seventh resistors; one end of the fifth resistor R3 is connected to the emitter of the third transistor Q3, and the other end is connected to the green light control end of the indicator circuit, and the input end of the current limiting circuit is connected The emitter of the third transistor Q3, the output end is connected to the base of the third transistor Q3 via the sixth resistor R24, and the collector of the third transistor Q3 is connected to the seventh resistor R25 followed by the indicator light. The red light control terminal of the circuit.

The indicator circuit, when the utility power is connected, adjusts the management module to work, and the base current of the third transistor Q3 passes through the sixth resistor R24 and is grounded through the protection circuit, and the third transistor Q3 is turned on, the current After passing through the third transistor Q3 and the seventh resistor R25, the red indicator light is lit, indicating that the circuit is in a charging state. When the battery is full, the charging protection module recognizes that the battery is full and stops working, and the third transistor Q3 does not When the ground current is stopped, the current will flow through the fifth resistor R23 and the green indicator light will be on, indicating that the battery is full.

In a preferred embodiment, the first transistor Q2, the second transistor Q1, and the third transistor Q3 are low conduction band-stop transistors, and the transistors are one or two resistors. The device is connected to the transistor and is assembled together. It is often used as a medium-speed switching tube. It can be regarded as an electronic switch in the circuit. When the saturation is turned on, its tube voltage drop is small. Applying this technical solution, the emergency lighting system can be operated under a stable voltage environment.

Please refer to FIG. 6 , which is a schematic diagram of a battery protection module of an emergency lighting circuit according to an embodiment of the present invention. The battery protection module includes a second processor U4, a third processor U5, and a filter circuit; the second processor U4 includes first to fourth ports, and the third processor U5 includes first and second ports; The third port of the U4 is connected to the first port of the third processor U5, the fourth port is connected to the second port of the third processor U5; the second port of the second processor U4 is grounded; the input of the filter circuit The end is connected to the battery connection end, and the output end is connected to the first port of the second processor U4. The filter circuit includes an eighth resistor R21 and a fourth capacitor C19. One end of the eighth resistor R21 is connected to the battery connection end, and the other end is connected to one end of the fourth capacitor and grounded. The anode of the battery is connected to the regulation management through the N5. a common junction of the eighth resistor R21 and the fourth capacitor C19 is coupled to the first port of the second processor U4. Specifically, the third processor U5 includes two sets of MOS tubes. The battery protection circuit protects the battery from overcharging, overdischarging, excessive current, battery life, or battery damage. It has a high accuracy voltage detection and time delay circuit. Low operating current, over current Protection reset, small package, providing a safe and reliable working environment for battery charging and discharging.

Please refer to FIG. 7 , which is a schematic diagram of a power module of an emergency lighting circuit according to an embodiment of the present invention. The power supply of the emergency lighting circuit provides a constant current through the power module. The good performance of the power module provides a good working voltage for the light board. When the utility power is connected, the power module works to supply power to the whole circuit and charge the battery at the same time. Specifically, the power module has an output constant current and a constant voltage, and provides a good working voltage for the LED light board module. When the utility power is connected, the power module works to provide a voltage lighting LED light board module. The other winding of the power module is rectified by the diode D5, the current limiting resistor R4, and the filter capacitor C16 to provide a DC voltage. The transistor Q1 and the thyristor TL1 form a voltage stabilizing circuit, the resistor R15 controls the conduction of the transistor Q1, and the capacitor C17 enables the thyristor TL1 to operate. Stable, resistors R16 and R17 form a sampling resistor to provide a stable operating voltage for battery charging. This voltage is limited by diode D11 to charge the battery. The resistor R21 is limited in current, and the capacitor C19 filters the working voltage to the second processor U4. The protection circuit is controlled by the second processor U4 and the third processor U5 to control overcharging, overdischarging, overcurrent, etc. of the battery. The third processor U5 is internally composed of two sets of M0S tubes, which reduces the internal working resistance of the battery. The second processor U4 and the third processor U5 work in a low-power micro-ampere level, so that the product can have enough Long standby. Transistor Q3, resistor R23, resistor R24, resistor R25, and protection circuit form a red-green indicating circuit. When the mains is connected to the battery charging protection circuit, the base current enters the ground through the protection circuit through the resistor R24. At this time, the transistor Q3 is turned on, and the current is lit by the red indicator light through the transistor Q3 and the resistor R25, indicating that the circuit is charging. When the battery is full, the protection circuit stops working due to overcharging. The base of the transistor Q3 turns off because there is no ground current. At this time, the current illuminates the green indicator light through the resistor R23, indicating that the battery is fully charged.

Specifically, in the present invention, the control module is composed of U6 and peripheral circuits. C18 is a filter capacitor, so that the first processor U6 works stably. When the mains is connected, the stable voltage provided by the transistor Q1 is connected to the fourth pin of the first processor U6, and the first processor U6 detects the fourth pin. There is voltage, the internal circuit is reset, the sixth pin is high, the transistor Q2 is cut off, and the emergency LED panel module is not lit. When the mains is disconnected, the voltage of the 4th pin disappears, the first processor U6 detects and delays 2-4 seconds, enters the emergency state, locks the timing control time, the 6th pin outputs the low potential, the transistor Q2 turns on, the battery voltage The LED array required for emergency response is illuminated by the transistor Q2 to achieve emergency lighting. With the continuation of emergency lighting time, reach the first processor U6 After the locked timing time, the 6th pin outputs a high potential, the transistor Q2 is turned off, and the LED light board is turned off. If the emergency LED light board needs to be illuminated at this time, the first processor U6 can also be realized. The fifth leg of the first processor U6 is forced on or off control, and the S1 is a forced switch button, and the switch light is always on, such as Press the lamp again to extinguish, and cycle.

Meanwhile, as an embodiment, the working process of the dimming circuit is as follows: After the power module is rectified by the diode D6, C15 filtered, R30 current limited, and D9 regulated, a stable operating voltage is provided for the control chip U7. When the user turns on the wall switch, the power module works, and the transformer is powered by the current limiting resistor R4, the rectifier diode D7, the filter capacitor C23, the fourth transistor Q6, and the fourth transistor Q6 is turned on, and the control chip is controlled. 1 pin to ground low potential, 3 pin output low potential, control the fifth transistor Q5 conduction, due to the conduction of the fifth transistor Q5, the gate voltage of the field effect transistor Q4 also decreases, Q4 source The voltage of the pole is controlled, and the brightness of the LED panel module also changes with the voltage. When the user turns off the wall switch, the power module does not work, the LED light board is off, and the fourth transistor Q6 base is de-energized, and the fourth transistor Q6 does not work. Due to the energy storage of the fifth capacitor C22, the control chip U7 maintains a short standby operation and counts internal data. When the user turns on the wall switch again, the power module works, the base of the fourth transistor Q6 is powered again, the pin 1 of the control chip U7 is low again, the internal trigger of the control chip U7, the output of the 4 pin is low, due to R34 The resistance is small, and the conduction to the transistor Q5 is strengthened. The gate of the FET Q4 is clamped to the voltage at which the LED panel cannot be lit. At this time, the LED panel does not reach the lighting voltage, and the lamp does not illuminate. The size of the eleventh resistor R33 and the twelfth resistor R34 determines the brightness of the LED panel. When the user turns off again - turn on the wall switch, the 1 pin of the control chip U7 is once again low, then the control chip U7 stops outputting, the fifth transistor Q5 does not conduct, and the FET Q4 is turned on. The strongest, the output voltage is the largest, the LED panel is the brightest, and the user operates the wall switch to achieve repeated dimming.

As a preferred embodiment, when the illumination lamp of the present invention is used as a home illumination, the dimming has three gear positions, and the brightness of each gear can be adjusted at will. The purpose of dimming is to satisfy the needs of people at home in different occasions. Different light intensities, such as watching TV, may be darker, and may be brighter when reading a book. The brightness of the LEDs can be adjusted according to different customers in different environments.

In order to achieve remote control and emergency, we can set the last file of the shift to a power failure emergency. In standby mode, you can realize that you don't want to let the lights light at night, you can know when the power is off, you can also realize emergency lighting after power failure, and you can set the lighting time of power failure emergency lighting. You can do different time control according to user requirements. In the event of a disaster or urgent need for lighting, it can be taken down as a flashlight and can be freely controlled to be turned on or off. The internal battery uses lithium iron phosphate, which has perfect battery control and protection circuit, and it is safe and reliable.

In summary, the lighting circuit of the present invention not only responds immediately when the power is off, but also plays the role of emergency lighting, and the user can adjust the brightness of the lamp according to the application, thereby prolonging the illumination time of the emergency light, and the operation is low, and the operation is low. Convenient and energy efficient. The system application setting panel can flexibly set the working time of emergency lighting according to people's needs, avoiding the phenomenon of waste energy, etc. The emergency lighting system is simple and reliable, and is widely used in occasions requiring lighting when power is off. The above is only the embodiment of the present invention, and is not intended to limit the scope of the invention, and the equivalent structure or equivalent process transformations made by the specification and the drawings of the present invention may be directly or indirectly applied to other related technologies. The scope of the invention is included in the scope of patent protection of the present invention.

Claims

Claim

1. An emergency lighting circuit, comprising: an LED light board module, an adjustment management module, a control module, and a power module and a dimming module;

The emergency lighting circuit according to claim 1, wherein the dimming module comprises a current limiting voltage regulator module, a switch detecting module, a switching control module, and an output control module, wherein

The emergency lighting circuit according to claim 2, wherein the current limiting voltage regulator module comprises a third diode and a fifth capacitor connected in parallel, a thirteenth resistor, and the third diode The anode is grounded, one end of the thirteenth resistor is connected to the cathode of the third diode, and the other end is connected to the output end of the power module;

The emergency lighting circuit of claim 1 , wherein: the control module comprises a first processor, a first capacitor and a first transistor, a first resistor and a button; the first processor comprises First to fifth ports; one end of the first capacitor is connected to the first port of the first processor, the other end of the first capacitor is connected to the fifth port of the first processor; the second port of the first processor is connected to The output end of the adjustment management module, the third port is connected to the ground after being connected to the button, and the fourth port is connected to the base of the first triode via the first resistor; the emitter of the first triode is connected to the first processor The first port is connected to the LED light panel module.

The emergency lighting circuit according to claim 1, wherein: the adjustment management module comprises a protection circuit, a voltage stabilization circuit, a sampling circuit, a control circuit, and a first filter circuit;

An input end of the protection circuit is connected to a first output end of the power module, an output end of the protection circuit is connected to an input end of the voltage stabilization circuit, and an output end of the voltage stabilization circuit is connected to the first end An output end of the filter circuit is connected to an output end of the sampling circuit, and an output end of the sampling circuit is an output end of the adjustment management module.

6. The emergency lighting circuit of claim 5, wherein:

The protection circuit includes a second capacitor and a second resistor. The capacitor is a ceramic capacitor. The anode of the capacitor is connected to one end of the second resistor, the cathode of the capacitor is grounded, and the other end of the second resistor is connected to the voltage regulator. The input of the circuit;

The emergency lighting circuit according to claim 5, wherein: the adjustment management module further comprises a red and green indicating circuit, wherein the red and green indicating circuit comprises an indicator circuit, a current limiting circuit, a second transistor, a third triode and fifth to seventh resistors;

8. The emergency lighting circuit according to claim 1, further comprising: a battery protection module, wherein the battery protection module has an external battery connection end and a power output terminal, wherein the battery protection module is configured to be normally powered by an external AC power supply. It provides charging protection for the external battery and causes the voltage of the external battery to be output to the outside through the power output when the power is turned off.

The emergency lighting circuit according to claim 8, wherein: the battery protection module comprises a second processor, a third processor, and a second filter circuit;

The third port of the second processor is connected to the first port of the third processor, the second processor The fourth port is connected to the second port of the third processor; the second port of the second processor is grounded;

The input end of the second filter circuit is connected to the battery connection end, and the output end of the second filter circuit is connected to the first port of the second processor.

An emergency lighting system, the emergency lighting circuit according to any one of claims 1-9, further comprising a battery and a setting panel; the setting panel includes a timing signal output end, and the control module further includes a timing a signal input end; the timing signal output end of the setting panel is connected to the timing signal input end of the emergency lighting circuit control module, and is configured to set a working time, including delay, standby, and timing time; the battery and the battery protection The battery terminals of the module are connected, and the battery is a rechargeable battery.