Lamp no-load control circuit, chip and emergency equipment
By designing a combination of lamp board drive module, comparison circuit and boost circuit in lamps, the problems of low safety and high power consumption in traditional lamps in no-load state are solved, and the output is stopped under no-load state is achieved, which improves the improvement of output in no-load state. The safety and service life of the product.
Patent Information
- Application Number
- CN202323426475.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-14
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2033-12-14
AI Technical Summary
Traditional lamps have risks of electric shock, short circuit and leakage when the drive board is not connected to the lamp board, and the output current and voltage in the no-load state increases the energy consumption of the equipment, resulting in low safety and high power consumption.
A lamp no-load control circuit is designed, including a lamp board driving module, a comparison circuit and a boost circuit. The sampling signal is input to the comparison circuit after the boost is input to the comparison circuit. The output control signal is fed back to the lamp board driving module to ensure that the Stop the output drive under no load state to improve safety and reduce energy consumption.
It effectively improves the safety of the product, reduces energy consumption, and improves the judgment accuracy of the comparison circuit through the boost circuit processing, ensures that the lamp board driving module is not output under no load state, protects product safety and reduces energy consumption.
Smart Images
Figure CN222192592U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of circuits, and in particular to a lamp no-load control circuit, a chip and emergency equipment. Background Art
[0002] Existing security systems need to install emergency lighting devices to provide lighting for a period of time when the normal lighting system cannot work in the event of danger. For traditional lamps with separate driver boards and light boards, when the driver board is not connected to the light board and other loads, there is voltage and current output at the output end of the driver board, so there are risks such as electric shock, product short circuit and leakage; and the output current and voltage of the driver board when it is not connected to the load, that is, in the no-load state, will also increase the energy consumption of the equipment. Therefore, it is necessary to improve traditional lamps such as LED lamps. Utility Model Content
[0003] The utility model provides a lamp no-load control circuit, a chip and an emergency device, aiming to solve the problem in the related art that a driving board outputs energy in a no-load state, resulting in low product safety and high power consumption.
[0004] In order to solve the above-mentioned technical problems, the first aspect of the utility model provides a lamp no-load control circuit, including: a light board driving module, a comparison circuit and a boost circuit; the first end of the light board driving module is electrically connected to one end of the comparison circuit, and the second end is used to electrically connect to an external light board, the boost circuit is respectively electrically connected to the other end of the comparison circuit and the third end of the light board driving module, and the boost circuit includes a diode, which is respectively electrically connected to the comparison circuit and the light board driving module.
[0005] Furthermore, the comparison circuit includes a comparator and a reference voltage supply circuit, the first end of the comparator is electrically connected to the reference voltage supply circuit, the second end of the comparator is electrically connected to the boost circuit, and the third end of the comparator is electrically connected to the light board drive module.
[0006] Further, the reference voltage supply circuit includes a first resistor and a second resistor, one end of the first resistor is electrically connected to a power supply, the other end of the first resistor is electrically connected to one end of the second resistor, the other end of the second resistor is grounded, and the common connection end of the first resistor and the second resistor is electrically connected to the first end of the comparator.
[0007] Furthermore, the comparison circuit further includes a third resistor, and two ends of the third resistor are electrically connected to the first end and the third end of the comparator respectively.
[0008] Furthermore, the comparison circuit further includes a fourth resistor, and the fourth resistor is electrically connected between the reference voltage supply circuit and the first end of the comparator.
[0009] Furthermore, the anode of the diode is electrically connected to the comparison circuit, and the cathode of the diode is electrically connected to the third end of the light board driving module.
[0010] Furthermore, the lamp board driving module includes an electronic switch, a first end of the electronic switch is electrically connected to the comparison circuit, a second end of the electronic switch is used to be electrically connected to the light board, and a third end of the electronic switch is electrically connected to a power supply; wherein the electronic switch includes at least any one of the following: a relay, a MOS tube, a triode, and a switch chip.
[0011] Furthermore, the lamp board driving module also includes a capacitor and a fifth resistor, one end of the capacitor is electrically connected to the third end of the electronic switch, and the other end of the capacitor is grounded, one end of the fifth resistor is electrically connected to the third end of the lamp board driving module, and the other end of the fifth resistor is grounded.
[0012] A second aspect of the present invention provides a lamp no-load control chip, comprising the lamp no-load control circuit as described in the first aspect of the present invention.
[0013] The third aspect of the utility model provides an emergency device, comprising the lamp no-load control circuit as described in the first aspect of the utility model or the lamp no-load control chip as described in the second aspect of the utility model.
[0014] From the above description, it can be seen that the lamp board current sampling signal output by the lamp board driving module of the utility model passes through the boost circuit and is input into the comparison circuit for judgment. The control signal is output based on the judgment result and fed back to the light board driving module to control the output of the light board driving module, thereby controlling the light board driving module to stop output driving in a no-load state, effectively improving the safety of the product and reducing the energy consumption of the product. At the same time, through the processing of the boost circuit, the accuracy of the comparison circuit judgment can be improved. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a structural schematic diagram of a lamp no-load control circuit according to an embodiment of the utility model;
[0016] Figure 2 This is a circuit schematic diagram of the first lamp no-load control circuit of the embodiment of the utility model;
[0017] Figure 3 It is a circuit principle diagram of the second lamp no-load control circuit of the embodiment of the utility model;
[0018] Figure 4This is a circuit schematic diagram of a lamp panel driving module according to an embodiment of the utility model. DETAILED DESCRIPTION
[0019] In order to make the purpose, technical scheme and advantages of the utility model clearer, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. It should be understood that the specific embodiments described herein are only used to explain the utility model and are not used to limit the utility model. In addition, the technical features involved in the various embodiments of the utility model described below can be combined with each other as long as they do not conflict with each other.
[0020] In the related art, since the driver board outputs energy in a no-load state, resulting in low product safety and high power consumption, an embodiment of the utility model provides a no-load control circuit for a lamp.
[0021] like Figure 1 As shown is a structural schematic diagram of a lamp no-load control circuit provided by an embodiment of the utility model, the lamp no-load control circuit includes: a lamp board driving module 100, a comparison circuit 200 and a boost circuit 300; a first end of the lamp board driving module 100 is electrically connected to one end of the comparison circuit 200, and a second end is used to electrically connect to an external lamp board 400, the boost circuit 300 is respectively electrically connected to the other end of the comparison circuit 200 and the third end of the lamp board driving module 100, and the boost circuit 300 includes a diode 310, and the diode 310 is respectively electrically connected to the comparison circuit 200 and the lamp board driving module 100.
[0022] Specifically, in the present embodiment, the lamp board current sampling signal output by the lamp board driving module 100 passes through the boost circuit 300 and is input to the comparison circuit 200 for judgment. The control signal is output based on the judgment result and fed back to the lamp board driving module 100 to control the output of the lamp board driving module 100, thereby controlling the lamp board driving module 100 to stop output driving in a no-load state, thereby effectively improving the safety of the product and reducing the energy consumption of the product. At the same time, through the processing of the boost circuit 300, the accuracy of the judgment of the comparison circuit 200 can be improved.
[0023] like Figure 2 The circuit diagram of the first lamp no-load control circuit provided by this embodiment is shown in FIG. Figure 2The comparison circuit 200 includes a comparator 210 and a reference voltage supply circuit 220. The first end of the comparator 210 is electrically connected to the reference voltage supply circuit 220, the second end of the comparator 210 is electrically connected to the boost circuit 300, and the third end of the comparator 210 is electrically connected to the light board driving module 100. The anode of the diode D1 (310) is electrically connected to the comparison circuit 200, and the cathode of the diode D1 is electrically connected to the third end of the light board driving module 100. The third end is the light board sampling signal output end.
[0024] Specifically, in the present embodiment, since the sampling detection signal from the LED lamp driver board is generally obtained from the conversion of the current flowing through the sampling resistor of the LED lamp, and since the current of the lamp is relatively large, in order to reduce power consumption, the detection resistor has a very small value, and the sampling detection voltage obtained at both ends of the detection resistor will be relatively weak. The purpose of adding a diode D1 is to raise the level potential of pin 2 of U1, so as to facilitate the comparison and detection of the comparator. First, the level of pin 3 of the comparator U1 is set to be slightly higher than the conduction voltage drop of the silicon diode. When the LED driver board does not detect the load, the LED driver board will output a feedback sampling detection level signal of 0 level, the cathode of D1 is 0 level, pin 2 of the comparator U1 is smaller than pin 3 of U1, and pin 1 of the comparator U1 outputs a high level, which controls the LED driver board to shut down, and the LED driver board has no output. On the contrary, when the LED driver board detects the load, the LED driver board will output a feedback sampling detection level signal and send it to the cathode of D1. Pin 2 of the comparator U1 is larger than pin 3 of U1, and pin 1 of the comparator U1 outputs a low level, which controls the LED driver board to work normally, and the LED driver board has output.
[0025] like Figure 3 The circuit schematic diagram of the second lamp no-load control circuit provided in this embodiment is shown in FIG. Figure 3 The reference voltage supply circuit 220 includes a first resistor R1 and a second resistor R2, one end of the first resistor R1 is electrically connected to a power source, the other end of the first resistor R1 is electrically connected to one end of the second resistor R2, the other end of the second resistor R2 is grounded, and a common connection end of the first resistor R1 and the second resistor R2 is electrically connected to the first end 3 of the comparator U1 (210).
[0026] Specifically, in this embodiment, the voltage division of the first resistor R1 and the second resistor R2 is used as a reference voltage of the comparator, and the resistance values of the first resistor R1 and the second resistor R2 can be set according to actual needs to provide different reference voltages for the comparator.
[0027] For further information, see Figure 3The comparison circuit 200 further includes a third resistor R3, and two ends of the third resistor R3 are electrically connected to the first end 3 and the third end 1 of the comparator U1 respectively. In addition, the comparison circuit 300 further includes a fourth resistor R4, and the fourth resistor R4 is electrically connected between the reference voltage supply circuit 220 and the first end of the comparator U1.
[0028] Specifically, in this embodiment, the fourth resistor R4 is the input current limiting resistor of the comparator U1, and the third resistor R3 is the hysteresis feedback resistor, which forms a hysteresis comparator with the first resistor R1, the second resistor R2 and the comparator U1 to improve the anti-interference ability of the circuit.
[0029] like Figure 4 The circuit diagram of a light board driving module provided in this embodiment is shown in FIG. Figure 4 The lamp board driving module 100 includes an electronic switch, a first end of the electronic switch is electrically connected to the comparator U1, a second end of the electronic switch is used to be electrically connected to the lamp board 400, and a third end of the electronic switch is electrically connected to the power supply; wherein the electronic switch includes at least any one of the following: a relay, a MOS tube, a triode, and a switch chip.
[0030] Specifically, in this embodiment, the electronic switch can be turned on and off according to the level signal transmitted by the comparator. When the pin 1 of the comparator U1 outputs a high level, the electronic switch is turned off, and the LED driver board has no output; conversely, when the LED driver board detects a load, the pin 1 of the comparator U1 outputs a low level, the electronic switch is turned on normally, and the LED driver board has an output. This ensures that the LED driver board stops outputting drive when there is no lamp load, and outputs drive when there is a lamp load, thereby protecting the product safety while reducing energy consumption and increasing the service life of the product.
[0031] For further information, see Figure 4 The lamp board driving module 100 further includes a capacitor C1 and a fifth resistor R5, one end of the capacitor C1 is electrically connected to the third end of the electronic switch, the other end of the capacitor C1 is grounded, one end of the fifth resistor R5 is electrically connected to the third end of the lamp board driving module, and the other end of the fifth resistor R5 is grounded. The fifth resistor R5 is a sampling resistor. When the driving board is connected to the lamp load, the current flowing through the lamp load will flow back through the sampling resistor. At this time, a voltage drop will be generated on the sampling resistor, thereby providing a corresponding lamp board sampling signal.
[0032] Specifically, in this embodiment, in order to make the circuit input a stable driving power supply, a filtering unit such as a filtering capacitor can be added to the power input end of the electronic switch to improve the stability of the circuit. The filtering unit can also adopt other topological structures and can be designed according to actual needs.
[0033] The lamp no-load control circuit provided by the embodiment of the utility model inputs the lamp board current sampling signal output by the lamp board driving module into the boost circuit, and then inputs it into the comparison circuit for judgment after being processed by the boost circuit, and outputs a control signal based on the judgment result and feeds it back to the lamp board driving module to control the output of the light board driving module, thereby controlling the light board driving module to stop output drive in the no-load state, effectively improving the safety of the product and reducing the energy consumption of the product. At the same time, through the processing of the boost circuit, the accuracy of the comparison circuit judgment can be improved.
[0034] The embodiment of the utility model further provides a lamp no-load control chip, and the lamp no-load control chip includes the above-mentioned lamp no-load control circuit.
[0035] The embodiment of the utility model further provides an emergency device, which includes the above-mentioned lamp no-load control circuit or lamp no-load control chip. The emergency device may be an emergency lighting device.
[0036] It should be noted that the various embodiments in the present invention are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same and similar parts between the various embodiments can be referenced to each other.
[0037] It should also be noted that, in the present invention, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise one..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.
[0038] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined in the present invention may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown in the present invention, but will conform to the widest range consistent with the principles and novel features disclosed in the present invention.
Claims
1. A lamp no-load control circuit, characterized in that: include: A light board driving module, a comparison circuit and a boost circuit; the first end of the light board driving module is electrically connected to one end of the comparison circuit, and the second end is used to electrically connect to an external light board, the boost circuit is respectively electrically connected to the other end of the comparison circuit and the third end of the light board driving module, and the boost circuit includes a diode, and the diode is respectively electrically connected to the comparison circuit and the light board driving module.
2. The lamp no-load control circuit according to claim 1, characterized in that: The comparison circuit includes a comparator and a reference voltage supply circuit, the first end of the comparator is electrically connected to the reference voltage supply circuit, the second end of the comparator is electrically connected to the boost circuit, and the third end of the comparator is electrically connected to the light board drive module.
3. The lamp no-load control circuit according to claim 2, characterized in that: The reference voltage supply circuit includes a first resistor and a second resistor, one end of the first resistor is electrically connected to a power supply, the other end of the first resistor is electrically connected to one end of the second resistor, the other end of the second resistor is grounded, and a common connection end of the first resistor and the second resistor is electrically connected to a first end of the comparator.
4. The lamp no-load control circuit according to claim 2, characterized in that: The comparison circuit further includes a third resistor, and two ends of the third resistor are electrically connected to the first end and the third end of the comparator respectively.
5. The lamp no-load control circuit according to claim 2, characterized in that: The comparison circuit further includes a fourth resistor electrically connected between the reference voltage supply circuit and the first end of the comparator.
6. The lamp no-load control circuit according to claim 1, characterized in that: The anode of the diode is electrically connected to the comparison circuit, and the cathode of the diode is electrically connected to the third end of the light board driving module.
7. The lamp no-load control circuit according to claim 1, characterized in that: The lamp board driving module includes an electronic switch, a first end of the electronic switch is electrically connected to the comparison circuit, a second end of the electronic switch is used to be electrically connected to the lamp board, and a third end of the electronic switch is electrically connected to a power supply; wherein the electronic switch includes at least any one of the following: a relay, a MOS tube, a triode, and a switch chip.
8. The lamp no-load control circuit according to claim 7, characterized in that: The lamp board driving module also includes a capacitor and a fifth resistor, one end of the capacitor is electrically connected to the third end of the electronic switch, and the other end of the capacitor is grounded, one end of the fifth resistor is electrically connected to the third end of the lamp board driving module, and the other end of the fifth resistor is grounded.
9. A lamp no-load control chip, characterized in that: The invention comprises a lamp no-load control circuit as claimed in any one of claims 1 to 8.
10. An emergency device, characterized in that: It comprises the lamp no-load control circuit as described in any one of claims 1 to 8 or the lamp no-load control chip as described in claim 9.