Emergency lighting circuit
By introducing switch modules and emergency lighting detection modules into emergency lighting circuits, the problem of traditional emergency lighting circuits requiring two sets of switches is solved, and the functions of multi-color temperature lighting and emergency flashlight are realized, simplifying product design.
Patent Information
- Application Number
- CN202421649594.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-12
- Publication Date
- 2025-07-11
- Estimated Expiration
- 2034-07-12
AI Technical Summary
Traditional emergency lighting circuits require two sets of switches to realize multi-color temperature lighting and emergency flashlight functions, resulting in product design being limited by structural space.
An emergency lighting circuit is adopted, including an LED driver module, an emergency light source, a main lighting light source, a switch module and an emergency lighting detection module. The multi-color temperature lighting function is realized through a switch module, and the main power status is detected through an emergency lighting detection module, and the emergency light source is automatically activated.
The multi-color temperature lighting and emergency flashlight functions are realized through a switch module, simplifying product design and improving the flexibility and functionality of the circuit.
Smart Images
Figure CN223093913U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of emergency lighting, in particular to an emergency lighting circuit. Background Art
[0002] At present, the traditional flashlight mode of the emergency lighting circuit is realized by connecting a switch and a resistor in front of a rectifier bridge. In order to achieve multi-color temperature lighting, a set of switches for switching the color temperature needs to be set up additionally. Therefore, the traditional circuit design usually requires two sets of switches to achieve the emergency lighting function and the color temperature switching function. Since two sets of switches need to be set, and one set of switches is located in front of the bridge and the other set is located behind the bridge, the product design will be affected by the size of the structural space, etc., and it is difficult to realize the function of an emergency flashlight. Summary of the Utility Model
[0003] The technical problem to be solved by the utility model is: to provide an emergency lighting circuit, which solves the problem that two sets of switches are required to achieve multi-color temperature lighting and the function of an emergency flashlight.
[0004] In order to solve the above technical problem, the technical solution adopted by the utility model is:
[0005] An emergency lighting circuit includes an LED driving module, an emergency light source, a main lighting light source, a switch module and an emergency lighting detection module; the input end of the LED driving module and the detection end of the emergency lighting detection module are both used for connecting with a power supply; the output end of the LED driving module is connected with the input end of the switch module; the output end of the switch module is selectively connected with the main lighting light source or the emergency lighting detection module; the main lighting light source includes a low color temperature light source and a high color temperature light source, the switch module includes at least two color temperature gears for selectively connecting the low color temperature light source or the high color temperature light source; the output end of the emergency lighting detection module is connected with the emergency light source.
[0006] Furthermore, the switch module further includes a third gear, and the third gear is connected with the low color temperature light source and the high color temperature light source.
[0007] Further, the switch module includes a gating switch, a first path, a second path, a third path, a fourth path, a fifth path, a first current-limiting resistor, and a second current-limiting resistor; a fixed end of the gating switch is connected to an output end of the LED driving module; a gating end of the gating switch is selectively connected to an input end of the first path, an input end of the second path, an input end of the third path, an input end of the fourth path, or an input end of the fifth path; an output end of the first path is connected to the low-color-temperature light source; the second path includes a first branch and a second branch; an output end of the first branch is connected to the low-color-temperature light source, an output end of the second branch is connected to the first current-limiting resistor, and the other end of the first current-limiting resistor is connected to the high-color-temperature light source; the third path includes a third branch and a fourth branch; an output end of the third branch is connected to the low-color-temperature light source, an output end of the fourth branch is connected to the high-color-temperature light source; the fourth path includes a fifth branch and a sixth branch; an output end of the fifth branch is connected to the second current-limiting resistor, the other end of the second current-limiting resistor is connected to the low-color-temperature light source, and an output end of the sixth branch is connected to the high-color-temperature light source; an output end of the fifth path is connected to the high-color-temperature light source.
[0008] Further, diodes are provided at the input ends of the second path, the third path, and the fourth path, and are connected in the forward direction to the diodes.
[0009] Further, the switch module further includes an emergency path; an input end of the emergency path is connected to the gating end of the gating switch; an output end of the emergency path is connected to a detection end of the emergency lighting detection module.
[0010] Further, the emergency lighting detection module includes an emergency detection chip and an emergency power supply; a detection end of the emergency detection chip is used for connecting to the mains power; a power input end of the emergency detection chip is respectively connected to the emergency power supply and a negative electrode of the main lighting light source; an enable end of the emergency detection chip is connected to the emergency light source.
[0011] Further, the LED driving module includes a rectifier bridge, a filtering unit, and a driving chip; an input end of the rectifier bridge is used for connecting to the mains power; an output end of the rectifier bridge is connected to an input end of the filtering unit; an output end of the filtering unit is respectively connected to a power supply end of the driving chip and an input end of the switch module.
[0012] Further, the filtering unit includes a first inductor, a first capacitor, a first resistor, and an electrolytic capacitor; one end of the first inductor is respectively connected to one end of the first capacitor, one end of the first resistor, and the output end of the rectifier bridge; the other end of the first inductor is respectively connected to one end of the electrolytic capacitor, the other end of the first resistor, the power supply terminal of the driving chip, and the input terminal of the switching module; the other end of the first capacitor is connected to the other end of the electrolytic capacitor and grounded.
[0013] The beneficial effects of the present utility model are as follows: By providing a switching module at the output end of the LED driving module, and the switching module is used to select and connect the main lighting source or the emergency lighting detection module. The main lighting source includes a low-color-temperature light source and a high-color-temperature light source, and color temperature switching can be performed through at least two color temperature gears of the switching module, that is, multi-color temperature lighting and the function of an emergency flashlight are realized through one switching module; at the same time, the state of the switch closed between the live wire and the neutral wire of the mains can be detected through the emergency lighting detection module. When the switch is detected to be disconnected, the emergency light source is started to realize the emergency flashlight mode. Description of the Drawings
[0014] Figure 1 It is a circuit diagram of an emergency lighting circuit in an embodiment of the present utility model;
[0015] Figure 2 It is a circuit diagram of the switching module in an emergency lighting circuit in an embodiment of the present utility model;
[0016] Figure 3 It is a circuit diagram of the emergency lighting detection module in an emergency lighting circuit in an embodiment of the present utility model;
[0017] Figure 4 It is a circuit diagram of the LED driving module in an emergency lighting circuit in an embodiment of the present utility model;
[0018] Figure 5 It is a schematic diagram of the emergency mode loop in an emergency lighting circuit in an embodiment of the present utility model;
[0019] Label Description:
[0020] 1. LED driving module; 2. Emergency light source; 3. Main lighting source; 4. Switching module; 5. Emergency lighting detection module;
[0021] S1. Selection switch; R18. First current-limiting resistor; R22. Second current-limiting resistor; IC2. Emergency detection chip; BAT. Emergency power supply; BR. Rectifier bridge; IC1. Driving chip; L1. First inductor; C1. First capacitor; R1. First resistor; E1. Electrolytic capacitor. Detailed Embodiment
[0022] To describe in detail the technical content, achieved objectives and effects of the present utility model, the following will be described in conjunction with the embodiments and with reference to the drawings.
[0023] Please refer to Figure 1 , an emergency lighting circuit, comprising an LED driving module, an emergency light source, a main lighting source, a switch module and an emergency lighting detection module; the input end of the LED driving module and the detection end of the emergency lighting detection module are both used for connection to a power source; the output end of the LED driving module is connected to the input end of the switch module; the output end of the switch module is selectively connected to the main lighting source or the emergency lighting detection module; the main lighting source includes a low-color-temperature light source and a high-color-temperature light source, and the switch module includes at least two color-temperature levels for selectively connecting the low-color-temperature light source or the high-color-temperature light source; the output end of the emergency lighting detection module is connected to the emergency light source.
[0024] As can be seen from the above description, the beneficial effects of the present utility model are as follows: by providing a switch module at the output end of the LED driving module, and the switch module is used to selectively connect the main lighting source or the emergency lighting detection module, and the main lighting source includes a low-color-temperature light source and a high-color-temperature light source, and color-temperature switching can be achieved through at least two color-temperature levels of the switch module, that is, multi-color-temperature lighting and the function of an emergency flashlight are realized through one switch module; at the same time, the state of the switch closure between the live wire and the neutral wire of the mains can be detected through the emergency lighting detection module, and when the switch is detected to be disconnected, the emergency light source is activated to implement the emergency flashlight mode.
[0025] Furthermore, the switch module further includes a third level, and the third level is connected to the low-color-temperature light source and the high-color-temperature light source.
[0026] As can be seen from the above description, by providing the third level to be connected to the low-color-temperature light source and the high-color-temperature light source simultaneously, the adjustment of the intermediate color temperature is achieved.
[0027] Further, the switch module includes a gating switch, a first path, a second path, a third path, a fourth path, a fifth path, a first current-limiting resistor, and a second current-limiting resistor; a fixed end of the gating switch is connected to an output end of the LED driving module; a gating end of the gating switch is selectively connected to an input end of the first path, an input end of the second path, an input end of the third path, an input end of the fourth path, or an input end of the fifth path; an output end of the first path is connected to the low-color-temperature light source; the second path includes a first branch and a second branch; an output end of the first branch is connected to the low-color-temperature light source, an output end of the second branch is connected to the first current-limiting resistor, and the other end of the first current-limiting resistor is connected to the high-color-temperature light source; the third path includes a third branch and a fourth branch; an output end of the third branch is connected to the low-color-temperature light source, an output end of the fourth branch is connected to the high-color-temperature light source; the fourth path includes a fifth branch and a sixth branch; an output end of the fifth branch is connected to the second current-limiting resistor, the other end of the second current-limiting resistor is connected to the low-color-temperature light source, and an output end of the sixth branch is connected to the high-color-temperature light source; an output end of the fifth path is connected to the high-color-temperature light source.
[0028] As can be seen from the above description, by providing five paths, different color temperature modes can be realized through the five paths respectively, meeting the user's setting requirements for different color temperatures.
[0029] Further, diodes are provided at the input ends of the second path, the third path, and the fourth path, and are connected in the forward direction to the diodes.
[0030] As can be seen from the above description, by providing diodes connected in the forward direction at the input ends of the second path, the third path, and the fourth path, the stability of the path current is improved.
[0031] Further, the switch module further includes an emergency path; an input end of the emergency path is connected to the gating end of the gating switch; an output end of the emergency path is connected to a detection end of the emergency lighting detection module.
[0032] As can be seen from the above description, by providing the emergency path, when the switch module is toggled to the emergency path, the emergency lighting detection module is connected, realizing the function of the user actively turning on the emergency lighting.
[0033] Further, the emergency lighting detection module includes an emergency detection chip and an emergency power supply; a detection end of the emergency detection chip is used to be connected to the mains power; a power input end of the emergency detection chip is respectively connected to the emergency power supply and a negative electrode of the main lighting light source; an enable end of the emergency detection chip is connected to the emergency light source.
[0034] As described above, an emergency lighting detection module is composed of an emergency detection chip and an emergency power supply. The power input terminals of the emergency detection chip are respectively connected to the emergency power supply and the negative electrode of the main lighting source, so that the emergency power supply can be charged while the main lighting source is working, ensuring that the emergency power supply can provide stable power for the emergency detection chip.
[0035] Further, the LED driving module includes a rectifier bridge, a filtering unit and a driving chip; the input terminal of the rectifier bridge is used to connect to the mains; the output terminal of the rectifier bridge is connected to the input terminal of the filtering unit; the output terminal of the filtering unit is respectively connected to the power supply terminal of the driving chip and the input terminal of the switching module.
[0036] As described above, by setting a rectifier bridge to convert the input mains into a direct current, and then filtering the input power supply through a filtering unit, a stable direct current can be provided for the driving chip and the main lighting source.
[0037] Further, the filtering unit includes a first inductor, a first capacitor, a first resistor and an electrolytic capacitor; one end of the first inductor is respectively connected to one end of the first capacitor, one end of the first resistor and the output terminal of the rectifier bridge; the other end of the first inductor is respectively connected to one end of the electrolytic capacitor, the other end of the first resistor, the power supply terminal of the driving chip and the input terminal of the switching module; the other end of the first capacitor is connected to the other end of the electrolytic capacitor and grounded.
[0038] As described above, by forming a π-shaped filter with a first inductor, a first capacitor, a first resistor and an electrolytic capacitor, the AC components in the power supply can be effectively filtered out.
[0039] The emergency lighting circuit provided by the present utility model, such as emergency battery lights and other products, realizes general lighting with multi-color temperature functions and emergency flashlight functions, which will be described below through specific embodiments:
[0040] Embodiment 1
[0041] Please refer to Figure 1, An emergency lighting circuit, comprising an LED driving module 1, an emergency light source 2, a main lighting light source 3, a switch module 4 and an emergency lighting detection module 5; the input end of the LED driving module 1 and the detection end of the emergency lighting detection module 5 are both used for connecting to a power supply; the output end (LED+) of the LED driving module 1 is connected to the input end of the switch module 4; the output end of the switch module 4 is selectively connected to the main lighting light source 3 or the emergency lighting detection module 5; the main lighting light source 3 includes a low-color-temperature light source and a high-color-temperature light source, and the switch module 4 includes at least two color temperature gears for selectively connecting the low-color-temperature light source or the high-color-temperature light source; the output end of the emergency lighting detection module 5 is connected to the emergency light source 2; wherein, the switch module 4 further includes a third gear which is connected to the low-color-temperature light source and the high-color-temperature light source.
[0042] Please refer to Figure 2 , the switch module 4 includes a selection switch S1, a first path, a second path, a third path, a fourth path, a fifth path, a first current-limiting resistor R18 and a second current-limiting resistor R22; the fixed end of the selection switch S1 is connected to the output end (LED+) of the LED driving module 1; the selected end of the selection switch S1 is selectively connected to the input end of the first path, the input end of the second path, the input end of the third path, the input end of the fourth path or the input end of the fifth path; wherein, the ratio of the current-limiting resistors connected to the two light sources is different in different gears, so the current ratio of the two light sources is different, thus realizing different color temperature ratios, and the specific color temperature can be adjusted according to the resistance value. The specific setting methods of each path are as follows:
[0043] 1) The output end of the first path is connected to the low-color-temperature light source (W+); at this time, the LED driving module 1 is connected to the low-color-temperature light source, and the color temperature is 2700K.
[0044] 2) The second path includes a first branch and a second branch; the output end of the first branch is connected to the low-color-temperature light source (W+), the output end of the second branch is connected to the first current-limiting resistor R18, and the other end of the first current-limiting resistor R18 is connected to the high-color-temperature light source (A+); the first current-limiting resistor R18 can also be realized by two resistors in parallel, such as Figure 2 composed of resistor R18 and resistor R19 in
[0045] . At this time, the LED driving module 1 is connected to both the low-color-temperature light source and the high-color-temperature light source, and a current-limiting resistor is provided in the high-color-temperature light source branch, and the color temperature is 3000K.
[0046] 4) The fourth path includes a fifth branch and a sixth branch; the output end of the fifth branch is connected to the second current-limiting resistor R22, the other end of the second current-limiting resistor R22 is connected to the low-color-temperature light source, and the output end of the sixth branch is connected to the high-color-temperature light source; at this time, the LED driving module 1 is connected to both the low-color-temperature light source and the high-color-temperature light source, and a current-limiting resistor is provided in the low-color-temperature light source branch, and the color temperature is 4000K.
[0047] 5) The output end of the fifth path is connected to the high-color-temperature light source; at this time, the LED driving module 1 is connected to the high-color-temperature light source, and the color temperature is 5000K.
[0048] 6) The switch module 4 further includes an emergency path; the input end of the emergency path is connected to the selected end of the selection switch S1; the output end of the emergency path is connected to the detection end of the emergency lighting detection module 5; as Figure 1 shown, a resistor R26 and a diode D12 are further provided in the emergency path to connect the emergency path to the neutral line; that is, a diode and resistor connection line is added after the rectifier bridge BR to a loop of the neutral line to implement the emergency lighting function of the flashlight.
[0049] At the same time, diodes are provided at the output end of the emergency path, the input end of the second path, the input end of the third path, and the input end of the fourth path, and are connected in the forward direction of the diodes; as Figure 2 shown, it includes diodes D6 - D12.
[0050] Please refer to Figure 3 , the emergency lighting detection module 5 includes an emergency detection chip IC2 and an emergency power supply BAT; the detection end (VL&VN) of the emergency detection chip IC2 is used to connect to the mains; the power input end (VDD) of the emergency detection chip IC2 is respectively connected to the emergency power supply BAT and the negative pole of the main lighting source 3; among them, the current needs to flow through a resistor and a diode before reaching the power input end of the emergency detection chip IC2 after passing through the negative pole of the main lighting source 3; the enable end (EN) of the emergency detection chip IC2 is connected to the emergency light source 2.
[0051] Please refer to Figure 4The LED driving module 1 includes a rectifier bridge BR, a filtering unit and a driving chip IC1; the input end of the rectifier bridge BR is used to connect to the mains; the output end of the rectifier bridge BR is connected to the input end of the filtering unit; the output end of the filtering unit is respectively connected to the power supply end of the driving chip IC1 and the input end of the switch module 4; wherein the filtering unit includes a first inductor L1, a first capacitor C1, a first resistor R1 and an electrolytic capacitor E1; one end of the first inductor L1 is respectively connected to one end of the first capacitor C1, one end of the first resistor R1 and the output end of the rectifier bridge BR; the other end of the first inductor L1 is respectively connected to one end of the electrolytic capacitor E1, the other end of the first resistor R1, the power supply end of the driving chip IC1 and the input end of the switch module 4; the other end of the first capacitor C1 is connected to the other end of the electrolytic capacitor E1 and is grounded.
[0052] The specific working principle of the above emergency lighting circuit is as follows:
[0053] When the mains (L&N) is connected, the LED driver module 1 provides voltage and current to the main lighting source 3 module, drives the main lighting source 3 to work normally, and provides charging for the emergency power supply BAT at the same time; when the emergency power supply BAT is fully charged, the main lighting circuit forms a working circuit through the voltage regulator tube to the ground.
[0054] When the switch of the switch module 4 is dialed into different gears, the color temperature changes. At this time, the emergency lighting detection module 5 receives the LN signal, and its internal switch tube is turned off, and the enable terminal outputs a low level, so the emergency light source 2 does not form a working circuit and does not work.
[0055] When the mains power is cut off (the lamp is still connected to the lamp holder LN), due to the existence of a certain impedance between the live wire and the neutral wire (the grid transformer has a certain impedance), the emergency detection chip IC2 detects the disconnection signal, and the enable terminal outputs a high level, so that a current loop is formed between the emergency power supply BAT and the emergency light source 2, and the emergency lighting works at this time. That is, when the lamp is plugged into the mains power, after the mains power is cut off, it can automatically light up in an emergency without turning on the switch.
[0056] Please refer to Figure 5 When the product is removed from the lamp holder (naturally disconnected from the mains), the switch is turned to the emergency position; at this time, the emergency detection chip IC2 detects the loop signal, and the enable terminal outputs a high level, so that a current loop is formed between the emergency power supply BAT and the emergency light source 2, realizing the emergency flashlight mode. That is, after the lamp is removed from the lamp holder, if an emergency is needed, you need to turn on the switch to start the emergency lighting.
[0057] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent transformations made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in the relevant technical field, are also included in the patent protection scope of the present invention.
Claims
1. An emergency lighting circuit, characterized in that, It includes an LED driving module, an emergency light source, a main lighting light source, a switch module, and an emergency lighting detection module; The input end of the LED driving module and the detection end of the emergency lighting detection module are both used to connect to a power source; The output end of the LED driving module is connected to the input end of the switch module; The output end of the switch module is selectively connected to the main lighting light source or the emergency lighting detection module; The main lighting light source includes a low-color-temperature light source and a high-color-temperature light source, and the switch module includes at least two color-temperature gears for selectively connecting the low-color-temperature light source or the high-color-temperature light source; The output end of the emergency lighting detection module is connected to the emergency light source.
2. The emergency lighting circuit according to claim 1, characterized in that, The switch module further includes a third gear, and the third gear is connected to the low-color-temperature light source and the high-color-temperature light source.
3. The emergency lighting circuit according to claim 2, characterized in that, The switch module includes a selection switch, a first path, a second path, a third path, a fourth path, a fifth path, a first current-limiting resistor, and a second current-limiting resistor; The fixed end of the selection switch is connected to the output end of the LED driving module; The selected end of the selection switch is selectively connected to the input end of the first path, the input end of the second path, the input end of the third path, the input end of the fourth path, or the input end of the fifth path; The output end of the first path is connected to the low-color-temperature light source; The second path includes a first branch and a second branch; the output end of the first branch is connected to the low-color-temperature light source, the output end of the second branch is connected to the first current-limiting resistor, and the other end of the first current-limiting resistor is connected to the high-color-temperature light source; The third path includes a third branch and a fourth branch; the output end of the third branch is connected to the low-color-temperature light source, and the output end of the fourth branch is connected to the high-color-temperature light source; The fourth path includes a fifth branch and a sixth branch; the output end of the fifth branch is connected to the second current-limiting resistor, the other end of the second current-limiting resistor is connected to the low-color-temperature light source, and the output end of the sixth branch is connected to the high-color-temperature light source; The output end of the fifth path is connected to the high-color-temperature light source.
4. An emergency lighting circuit according to claim 3, characterized in that, Diodes are provided at the input ends of the second path, the third path, and the fourth path and are connected in the forward direction to the diodes.
5. An emergency lighting circuit according to claim 3, characterized in that, The switch module further includes an emergency path; The input end of the emergency path is connected to the selected end of the selection switch; The output end of the emergency path is connected to the detection end of the emergency lighting detection module.
6. The emergency lighting circuit according to claim 1, characterized in that, The emergency lighting detection module includes an emergency detection chip and an emergency power supply; The detection end of the emergency detection chip is used to connect to the mains electricity; The power input end of the emergency detection chip is respectively connected to the emergency power supply and the negative pole of the main lighting light source; The enabling end of the emergency detection chip is connected to the emergency light source.
7. An emergency lighting circuit according to claim 1, characterized in that, The LED driving module includes a rectifier bridge, a filtering unit, and a driving chip; The input end of the rectifier bridge is used to connect to the mains electricity; The output end of the rectifier bridge is connected to the input end of the filtering unit; The output end of the filtering unit is respectively connected to the power supply end of the driving chip and the input end of the switch module.
8. An emergency lighting circuit according to claim 7, characterized in that, The filtering unit includes a first inductor, a first capacitor, a first resistor, and an electrolytic capacitor; One end of the first inductor is respectively connected to one end of the first capacitor, one end of the first resistor, and the output end of the rectifier bridge; The other end of the first inductor is respectively connected to one end of the electrolytic capacitor, the other end of the first resistor, the power supply end of the drive chip, and the input end of the switching module; The other end of the first capacitor is connected to the other end of the electrolytic capacitor and grounded.