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WO2025016125A1 - Circuit de lumière d'urgence et système d'éclairage - Google Patents

Circuit de lumière d'urgence et système d'éclairage Download PDF

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Publication number
WO2025016125A1
WO2025016125A1 PCT/CN2024/099229 CN2024099229W WO2025016125A1 WO 2025016125 A1 WO2025016125 A1 WO 2025016125A1 CN 2024099229 W CN2024099229 W CN 2024099229W WO 2025016125 A1 WO2025016125 A1 WO 2025016125A1
Authority
WO
WIPO (PCT)
Prior art keywords
circuit
input
voltage
emergency lighting
discharge
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/CN2024/099229
Other languages
English (en)
Chinese (zh)
Inventor
何婉玥
刘国强
何颖彦
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Joulwatt Technology Co Ltd
Original Assignee
Joulwatt Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Joulwatt Technology Co Ltd filed Critical Joulwatt Technology Co Ltd
Publication of WO2025016125A1 publication Critical patent/WO2025016125A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
    • H05B47/10—Controlling the light source
    • H05B47/105—Controlling the light source in response to determined parameters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0063—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with circuits adapted for supplying loads from the battery
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0068—Battery or charger load switching, e.g. concurrent charging and load supply
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from AC mains by converters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
    • H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
    • H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
    • H02J9/061—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for DC powered loads
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
    • H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
    • H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
    • H02J9/068—Electronic means for switching from one power supply to another power supply, e.g. to avoid parallel connection
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
    • Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection

Definitions

  • the present invention relates to the technical field of power electronics, and more particularly to an emergency lighting circuit and a lighting system.
  • the emergency lighting system there are two circuits for supplying power to light source loads such as LED lamps.
  • One circuit is for AC input to directly supply power to the load through a switch converter, and the other circuit is for emergency battery to supply power to the load.
  • the AC input is converted into a suitable voltage to supply the load through a switch converter such as an ACDC converter; in the case of no AC input, if the impedance of the two input terminals L/N is less than a preset value, the load is powered by the emergency battery, and if it is greater than the preset value, the lighting system is turned off.
  • the input impedance may be misdetected. This is because a large generator will cause the switch at the L/N terminal to be disconnected, that is, when there is no input AC, there will still be residual AC voltage. The residual voltage will cause the input terminal to misdetect that there is AC input. At this time, the emergency lighting cannot be turned on, resulting in the load not being able to work.
  • an object of the present invention is to provide an emergency lighting circuit and a lighting system to solve the technical problem of false detection in some environments existing in the prior art.
  • the present invention provides an emergency lighting circuit, wherein an AC input voltage supplies power to a lighting load through a power supply device, including: the power supply device includes a voltage conversion circuit and a battery, the voltage conversion circuit receives the AC input voltage to supply power to the lighting lamp and charges the battery, and an emergency lighting control circuit, in the absence of an AC input voltage, when the emergency lighting lamp needs to maintain lighting, the emergency lighting control circuit controls the battery to supply power to the emergency lighting lamp, the lighting load includes the lighting lamp and the emergency lighting lamp, wherein the emergency lighting control circuit includes a discharge circuit, the discharge circuit is connected to the input end of the AC input voltage or the end point of the lighting load to discharge the voltage of the connection node so that the emergency lighting control circuit can determine whether there is an AC input voltage.
  • the discharge circuit discharges the voltage at the AC input end with a predetermined current.
  • the discharge circuit is connected to at least one input terminal of the AC input voltage to discharge the voltage of the AC input terminal.
  • the emergency lighting control circuit includes an AC input detection circuit, which is connected to an input terminal of the AC input to obtain an input detection signal, and compares the input detection signal with a first threshold voltage.
  • the discharge circuit is controlled to discharge the voltage of the AC input terminal.
  • the discharge circuit when the input detection signal is higher than the first threshold voltage, the discharge circuit is controlled to stop discharging the voltage at the AC input end, and after a delay of a period of time, a timer is started to count, and when the input detection signal is lower than the first threshold voltage or the timer reaches a preset value, the discharge circuit is controlled to discharge the voltage at the AC input end.
  • the discharge circuit comprises a first discharge circuit and a second discharge circuit, the first discharge circuit is connected to one input end of the AC input voltage, and the second discharge circuit is connected to the other input end of the AC input voltage.
  • the first discharge circuit includes any one of a switch tube, a resistor and a switch tube connected in series, or a switch tube and a current source connected in series;
  • the second discharge circuit includes any one of a switch tube, a resistor and a switch tube connected in series, or a switch tube and a current source connected in series.
  • the first discharge circuit includes any one of a resistor and a current source; and the second discharge circuit includes any one of a resistor and a current source.
  • the power supply device also includes a high-voltage isolation circuit
  • the emergency lighting control circuit includes an impedance detection circuit.
  • the high-voltage isolation circuit is connected between the AC input terminal and the battery. When there is AC input, it is used to isolate the AC input terminal and the battery.
  • the impedance detection circuit is used to detect the impedance of the two AC input terminals to generate an impedance detection result. When there is no AC input voltage, the emergency lighting control circuit determines whether to start the battery to supply power to the emergency lighting lamp according to the impedance detection result.
  • the impedance detection circuit obtains an input detection signal based on an input terminal connected to the AC input, and compares the input detection signal with a second threshold voltage to obtain the impedance detection result.
  • the emergency lighting control circuit includes a switch control circuit and a first switch tube. The switch control circuit receives the comparison result of the AC input detection circuit and the impedance detection result. When both are in a valid state, the first switch tube is controlled to be turned on so that the battery can power the lighting lamp.
  • the discharge circuit is connected to the endpoint of the lighting load to discharge the connection node voltage.
  • the emergency lighting control circuit includes an impedance detection circuit, a comparison circuit, a switch control circuit and a first switch tube.
  • the impedance detection circuit obtains an input detection signal according to an input terminal connected to the AC input, and compares the input detection signal with a second threshold voltage to obtain the impedance detection result.
  • the comparison circuit compares the connection node voltage between the discharge circuit and the lighting load and a reference voltage to obtain a comparison signal.
  • the switch control circuit receives the comparison result of the comparison signal and the impedance detection result. When both are in a valid state, the first switch tube is controlled to be turned on so that the battery can power the lighting lamp.
  • a lighting system comprising the above-mentioned emergency lighting circuit and a lighting load, wherein the emergency lighting circuit receives an AC input voltage to control normal lighting and emergency lighting of the lighting load.
  • the control scheme of the emergency lighting of the present invention discharges the residual voltage at the AC input end or the terminal voltage of the lighting load in the discharge circuit, so that the system can accurately determine whether there is AC input.
  • the emergency lighting is started by the built-in battery, ensuring that the emergency lighting can be turned on smoothly in some specific occasions.
  • FIG1 is a circuit block diagram of a first embodiment of an emergency lighting circuit according to the present invention.
  • FIG2 is a circuit block diagram of a second embodiment of an emergency lighting circuit according to the present invention.
  • FIG3 is a circuit block diagram of a third embodiment of an emergency lighting circuit according to the present invention.
  • FIG4 is a specific circuit diagram according to the embodiment of FIG2 ;
  • FIG5 is a specific circuit diagram of an AC input detection circuit, an impedance detection circuit, and a switch control circuit according to the embodiment of FIG2 ;
  • FIG6 is a specific circuit diagram of a discharge control unit according to the embodiment of FIG3 ;
  • FIG7 is a circuit diagram of a first embodiment of a discharge circuit
  • FIG8 is a circuit diagram of a second embodiment of a discharge circuit
  • FIG. 9 is a circuit diagram of a third embodiment of a discharge circuit.
  • FIG1 is a circuit block diagram of the first embodiment of the emergency lighting circuit according to the present invention.
  • the emergency lighting circuit of the present application is applied in a lighting system.
  • the AC input voltage supplies power to the lighting load through a power supply device.
  • the power supply device here includes a voltage conversion circuit and a battery.
  • the voltage conversion circuit receives the AC input voltage to supply power to the lighting lamp and charge the battery.
  • the voltage conversion circuit takes an ACDC converter as an example. In the case of the presence or absence of AC input voltage, the AC input voltage is converted into a desired DC power supply to supply power to the lighting lamp through the ACDC converter. In the case of the absence of AC input voltage, when the emergency lighting lamp needs to maintain lighting, the emergency lighting control circuit controls the battery to supply power to the emergency lighting lamp.
  • the lighting load includes a lighting lamp and an emergency lighting lamp.
  • the emergency lighting lamp can be part of the lighting lamp or another lighting lamp load.
  • the emergency lighting control circuit includes a discharge circuit.
  • the discharge circuit is connected to at least one input terminal of the AC input voltage to discharge the voltage of the AC input terminal.
  • the discharge circuit can be a discharge circuit connected to one input terminal; or two discharge circuits, which are respectively connected to two input terminals for discharge.
  • the voltage conversion circuit may include a rectifier current to rectify the AC input voltage to obtain an input DC voltage.
  • the voltage conversion circuit may be configured to supply the DC input voltage to a battery for charging through a switch, or to couple the voltage to the battery for charging through a winding, or to supply the voltage at the output end to the battery for charging.
  • FIG1 takes a discharge circuit as an example
  • FIG2 is a circuit block diagram of a second embodiment of the emergency lighting circuit according to the present invention
  • FIG2 takes two discharge circuits as an example, wherein the discharge circuit includes a first discharge circuit and a second discharge circuit, wherein the first discharge circuit is connected to one input end of the AC input voltage, and the second discharge circuit is connected to the other input end of the AC input voltage.
  • the discharge circuit discharges the voltage of the AC input terminal with a predetermined current.
  • the discharge circuit discharges the voltage of the AC input terminal with a constant current, or it can discharge the voltage of the AC input terminal with a variable current.
  • the value of the predetermined current is generally set to a smaller value to avoid excessive power consumption.
  • FIG4 which is a specific circuit diagram of the embodiment in FIG2
  • FIG5 is a specific circuit diagram of the AC input detection circuit, the impedance detection circuit and the switch control circuit according to the embodiment in FIG2
  • FIG6 is a specific circuit diagram of the discharge control unit according to the embodiment in FIG3.
  • the discharge on and off of the discharge circuit is controlled by the discharge control unit, and the discharge control unit is connected to the input voltage detection circuit.
  • the emergency lighting control circuit includes an AC input detection circuit
  • the AC input detection circuit includes a detection circuit (resistors R1 and R2) and a comparator U1
  • Rd is an equivalent resistance between two input terminals
  • the detection circuit is connected to one input terminal of the AC input voltage to obtain an input detection signal, and compares the input detection signal with a first threshold voltage Vref1.
  • the comparison result Vu1 output by the comparator U1 is in a high level effective state, and the discharge control unit starts the discharge of the discharge circuit according to the comparison result of the comparator U1.
  • the discharge control unit When the input detection signal is greater than the first threshold voltage Vref1, the comparison result Vu1 is in a low-level effective state, and the discharge control unit turns off the discharge circuit. At this time, after a delay, a timer, such as timer 2, starts timing. When the input detection signal is lower than the first threshold voltage or the timer reaches, the discharge circuit is controlled to discharge the voltage at the AC input end. In this way, the preset value of timer 2 lasts for a period of time that is less than or equal to half a power frequency cycle, as known to those skilled in the art. Referring to Figure 6, the discharge control unit receives the comparison result Vu1 and the non-signal of the comparison result Vu1.
  • the non-signal of the comparison result Vu1 obtains the start time of the timer after a delay, and the non-signal of the comparison result Vu1 resets the previous count of the timer.
  • the comparison result Vu1 and the signal of timer 2 are passed through the OR gate to obtain a signal for controlling the discharge circuit.
  • the discharge circuit may include a first discharge circuit or a first discharge circuit and a second discharge circuit, wherein the first discharge circuit includes a switch tube, a resistor and a switch tube in series, such as a switch tube Q1 and a resistor R3, a switch tube in series and a current source; the second discharge circuit includes a switch tube, a resistor and a switch tube in series, such as a switch tube Q2 and a resistor R4, a switch tube in series and a current source.
  • the discharge condition of the discharge circuit is controlled by the switch tube, such as the discharge moment and the discharge duration, so that the discharge can be better controlled, and the switch tube can control the switch state by the comparison result of the input voltage detection.
  • the first discharge circuit includes any one of a resistor and a current source, such as a current source I1; the second discharge circuit includes any one of a resistor and a current source I2.
  • a current source I1 such as a current source I1
  • the above-mentioned discharge circuits can all discharge the voltage at the input end with a predetermined current.
  • the power supply device further includes an impedance detection circuit, a high-voltage isolation circuit and a switch module.
  • the switch module includes a switch control circuit and a first switch tube S1.
  • the impedance detection circuit includes a comparator U2 for detecting the impedance of two AC input terminals to generate an impedance detection result.
  • the impedance detection circuit obtains an input detection signal according to one input terminal connected to the AC input, and compares the input detection signal with the second threshold voltage Vref2 to obtain the impedance detection result Vu2.
  • the AC input detection circuit also includes a timer 1.
  • the timer 1 When the timer 1 receives the comparison result of the comparator U1 and continues to be in a low-level invalid state for a period of time, it is determined that there is no input AC voltage.
  • the negative signal of the comparator U1 is used to reset the timer 1, and the timer 1 outputs a signal Vj to the switch control circuit.
  • the switch control circuit receives the output signal of timer 1 and the impedance detection result, both of which are in a valid state, the switch control circuit receives the output signal of timer 1 and the impedance detection result.
  • the emergency lighting control circuit controls the battery not to supply power to the emergency lighting lamp according to the impedance detection result.
  • the switch control circuit includes an AND gate, a trigger, a switch drive circuit and a sampling circuit.
  • the AND gate receives the comparison result and the impedance detection result, both of which are in a valid state, it outputs a high-level valid signal.
  • the trigger generates a trigger signal to the switch drive circuit to control the switch S1 to be turned on, and the battery supplies power to the emergency lighting load.
  • the sampling circuit feeds back the current size of the battery supplying power to the emergency lighting lamp.
  • the high-voltage isolation circuit is connected between the AC input terminal and the battery. When there is an AC input, it is used to isolate the connection between the AC input terminal and the battery.
  • the high-voltage isolation circuit includes an isolation switch. The isolation switch is controlled to be on and off according to the comparison result of the AC input detection circuit. When the comparison result indicates that there is no AC input voltage, the isolation switch is turned on.
  • the high-voltage isolation circuit can also be a diode, which can also isolate the high-voltage input terminal and the battery.
  • FIG3 it is a circuit block diagram of the third embodiment of the emergency lighting circuit according to the present invention.
  • the emergency lighting control circuit in this embodiment is the same as the impedance detection circuit, switch module, and high-voltage isolation module in the first embodiment, and will not be described in detail here. The difference is that in this example, the discharge circuit is connected to the end point of the lighting load to discharge the connection node voltage.
  • the emergency lighting control circuit includes an impedance detection circuit, a comparison circuit, a switch control circuit, and a first switch tube.
  • the impedance detection circuit obtains an input detection signal according to an input end connected to the AC input, and compares the input detection signal with a second threshold voltage to obtain the impedance detection result.
  • the comparison circuit compares the connection node voltage between the discharge circuit and the lighting load and a reference voltage to obtain a comparison signal.
  • the reference voltage is the working voltage of the connected lighting load.
  • the switch control circuit receives the comparison result of the comparison signal and the impedance detection result. When both are in a valid state, the first switch tube is controlled to be turned on so that the battery supplies power to the lighting lamp.
  • the lighting load may include multiple lamp beads, and the connected lighting load may be a partial load of the lighting load.
  • the discharge circuit can be a set small current source, which pulls down the connected load voltage with a small current. When there is no AC input voltage, the voltage at the connection node between the discharge circuit and the lighting load is less than the reference voltage.
  • the voltage at the connection node between the discharge circuit and the lighting load is consistent with the reference voltage.
  • the voltage at the connection node between the discharge circuit and the lighting load will also be less than the reference voltage. Therefore, it can be accurately determined whether there is an AC input voltage, thereby accurately starting the emergency lighting.
  • the present application also provides a lighting system, comprising the emergency lighting circuit and a lighting load, wherein the emergency lighting circuit receives an AC input voltage to control normal lighting and emergency lighting of the lighting.
  • the lighting system of the present application discharges the voltage at the AC input end or the voltage of the load in a discharge circuit.
  • the discharge circuit discharges the residual voltage of the AC input so that the system can accurately determine whether there is an AC input.
  • the emergency lighting is started by the built-in battery to ensure that the emergency lighting can be turned on smoothly in some specific occasions.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Circuit Arrangements For Discharge Lamps (AREA)

Abstract

Est divulguée dans la présente demande une solution de commande pour une lumière d'urgence. Une tension d'entrée à courant alternatif fournit de l'énergie à une charge d'éclairage au moyen d'un appareil d'alimentation électrique, l'appareil d'alimentation électrique comprenant un circuit de conversion de tension et une batterie, le circuit de conversion de tension recevant la tension d'entrée à courant alternatif pour fournir de l'énergie à une lumière et charger la batterie. Dans le cas où il n'y a pas de tension d'entrée à courant alternatif, lorsqu'une lumière d'urgence est requise pour maintenir l'éclairage, de l'énergie est fournie à la lumière d'urgence au moyen de la batterie. Un circuit de décharge est connecté à au moins une extrémité d'entrée de la tension d'entrée à courant alternatif, de manière à décharger la tension d'une extrémité d'entrée à courant alternatif. Dans la présente demande, la tension d'une extrémité d'entrée à courant alternatif est déchargée au moyen d'un circuit de décharge, de telle sorte qu'un système peut déterminer avec précision s'il existe une entrée à courant alternatif, de façon à commander une batterie interne pour démarrer un éclairage d'urgence, ce qui permet d'assurer la mise en marche lisse d'une lumière d'urgence dans certaines occasions spécifiques.
PCT/CN2024/099229 2023-07-19 2024-06-14 Circuit de lumière d'urgence et système d'éclairage Pending WO2025016125A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202310890492.5 2023-07-19
CN202310890492.5A CN117279157B (zh) 2023-07-19 2023-07-19 应急照明灯电路及照明系统

Publications (1)

Publication Number Publication Date
WO2025016125A1 true WO2025016125A1 (fr) 2025-01-23

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ID=89216683

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2024/099229 Pending WO2025016125A1 (fr) 2023-07-19 2024-06-14 Circuit de lumière d'urgence et système d'éclairage

Country Status (2)

Country Link
CN (1) CN117279157B (fr)
WO (1) WO2025016125A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117279157B (zh) * 2023-07-19 2025-03-18 杰华特微电子股份有限公司 应急照明灯电路及照明系统

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003168578A (ja) * 2001-11-30 2003-06-13 Matsushita Electric Works Ltd 非常用照明装置
CN104349536A (zh) * 2013-08-05 2015-02-11 协记精密工业股份有限公司 停电照明与一般照明集成灯
CN105611684A (zh) * 2015-11-09 2016-05-25 深圳市稳先微电子有限公司 一种利用电源开关实现调光的电路和灯具
CN205489449U (zh) * 2016-01-07 2016-08-17 广州视源电子科技股份有限公司 一种电源电路
CN212393022U (zh) * 2020-05-26 2021-01-22 漳州立达信光电子科技有限公司 一种应急灯控制电路、应急灯控制装置及灯具
CN112965009A (zh) * 2021-02-07 2021-06-15 上海裕芯电子科技有限公司 一种应急照明系统、交流电网断电检测电路及检测方法
CN117279157A (zh) * 2023-07-19 2023-12-22 杰华特微电子股份有限公司 应急照明灯电路及照明系统

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003168578A (ja) * 2001-11-30 2003-06-13 Matsushita Electric Works Ltd 非常用照明装置
CN104349536A (zh) * 2013-08-05 2015-02-11 协记精密工业股份有限公司 停电照明与一般照明集成灯
CN105611684A (zh) * 2015-11-09 2016-05-25 深圳市稳先微电子有限公司 一种利用电源开关实现调光的电路和灯具
CN205489449U (zh) * 2016-01-07 2016-08-17 广州视源电子科技股份有限公司 一种电源电路
CN212393022U (zh) * 2020-05-26 2021-01-22 漳州立达信光电子科技有限公司 一种应急灯控制电路、应急灯控制装置及灯具
CN112965009A (zh) * 2021-02-07 2021-06-15 上海裕芯电子科技有限公司 一种应急照明系统、交流电网断电检测电路及检测方法
CN117279157A (zh) * 2023-07-19 2023-12-22 杰华特微电子股份有限公司 应急照明灯电路及照明系统

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CN117279157B (zh) 2025-03-18
CN117279157A (zh) 2023-12-22

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