Lighting fixtures with fault detection and self-locking control functions

Abstract

To provide a lighting device with a fault detection and a self-locking control function.SOLUTION: A lighting device with a fault detection and a self-locking control function includes a light-emitting module, a power supply module, a voltage detection module, a signal conversion module, a self-locking control module, and a signal control module. The power supply module drives the light-emitting module. The voltage detection module detects a driving voltage of the light-emitting module to generate a detection signal. The signal conversion module converts the detection signal into an operating status signal. The self-locking control module controls the power supply module. The signal control module controls the self-locking control module according to the operating status signal. The signal control module activates the self-locking control module when the operating status signal is in an abnormal state, and the self-locking control module controls the power supply module to stop driving the light-emitting module and enter a self-locking state.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a lighting device, and more particularly to a lighting device with fault detection and self-locking control functions. [Background technology]

[0002] Generally, multiple switches are installed in a building, and one switch may need to control two or more lighting devices. If one lighting device malfunctions and starts flashing, the user can only flip the switch corresponding to that lighting device. This will simultaneously turn off other lighting devices connected to that switch, resulting in a lack of lighting in some areas of the building. If the user does not turn off the switch, the malfunctioning lighting device will continue to flash, affecting the user's normal work. Although China Utility Model Registration No. 219761368 and China Patent Application Publication No. 116056281 also disclose circuit designs for lighting devices, they still fail to effectively solve the above problem.

[0003] Therefore, it is an urgent issue to propose a lighting device that can effectively solve the above problems. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] China Utility Model Registration No. 219761368 [Patent Document 2] Chinese Patent Application Publication No. 116056281 Summary of the Invention [Problem to be solved by the invention]

[0005] SUMMARY OF THE INVENTION It is an object of the present invention to provide a lighting device with fault detection and self-locking control functions. [Means for solving the problem]

[0006] The present invention provides a lighting device with fault detection and self-locking control functions, including a light-emitting module, a power supply module, a voltage detection module, a signal conversion module, a self-locking control module, and a signal control module. The power supply module drives the light-emitting module. The voltage detection module detects the driving voltage of the light-emitting module and generates a detection signal. The signal conversion module converts the detection signal into an operating status signal. The self-locking control module controls the power supply module. The signal control module controls the self-locking control module according to the operating status signal. When the operating status signal is in an abnormal state, the signal control module activates the self-locking control module, which controls the power supply module to stop driving the light-emitting module and enter a self-locking state.

[0007] In one refinement of the invention, the lighting device further comprises a signal delay module, wherein the signal conversion module transmits the operating state signal to the signal control module via the signal delay module.

[0008] As an improvement of the present invention, the signal delay module is turned on when the operating status signal is in an abnormal state to activate the signal control module, which then activates the self-locking control module to control the power supply module to stop driving the light-emitting module and enter a self-locking state.

[0009] In one refinement of the present invention, the signal conversion module comprises an operating state detection node, which is connected to the signal delay module and the constant voltage source, and presents an operating state signal.

[0010] In one refinement of the invention, the constant voltage source is provided by a power supply module.

[0011] In one improvement of the present invention, the signal conversion module includes an optical coupler, and two output ends of the optical coupler are respectively connected to the operation state detection node and the ground point, and the optical coupler is turned on when the detection signal is greater than the threshold value, causing the operation state detection node and the ground point to generate an operation state signal at low potential and representing a normal state. join The detector turns off when the detection signal is lower than the threshold, disconnecting the operation status detection node and ground and generating an operation status signal that is at a high potential and indicates an abnormal condition.

[0012] In one improvement of the present invention, the signal delay module includes a first Zener diode and a first capacitor. The operating state detection node is connected to the negative electrode of the first Zener diode, and the positive electrode of the first Zener diode is connected to one end of the first capacitor. The other end of the first capacitor is connected to ground. When the operating state detection node is at a high potential and generates an operating state signal indicating an abnormal state, the first Zener diode is destroyed, causing the first capacitor to be charged by the operating state signal. After the first capacitor is fully charged, the signal control module is driven, which causes the signal control module to drive the self-locking control module to control the power supply module to stop driving the light-emitting module and enter the self-locking state.

[0013] In one improvement of the present invention, the first Zener diode is not destroyed when the operating status detection node is at a low potential and generates an operating status signal representing a normal state, causing the signal delay module to remain in an off state.

[0014] In a refinement of the invention, the power supply module is a power supply module or a voltage transformation module.

[0015] In a refinement of the invention, the light emitting module is a light emitting diode or a light emitting diode array. [Effects of the Invention]

[0016] Based on the above, a lighting device with fault detection and self-locking control functions according to embodiments of the present invention may have one or more of the following advantages. (1) According to the disclosure of the present invention, a lighting device includes a light-emitting module, a power supply module, a voltage detection module, a signal conversion module, a self-locking control module, and a signal control module. The power supply module drives the light-emitting module. The voltage detection module detects the driving voltage of the light-emitting module and generates a detection signal. The signal conversion module converts the detection signal into an operating status signal. The self-locking control module controls the power supply module. The signal control module controls the self-locking control module according to the operating status signal. When the operating status signal is in an abnormal state, the signal control module activates the self-locking control module, which controls the power supply module to stop driving the light-emitting module and enter a self-locking state. By combining the above fault detection function and self-locking control function, if a lighting device malfunctions and flashes, the lighting device automatically enters a self-locking state. Therefore, a user does not need to turn off the switch corresponding to this lighting device, and other lighting devices connected to this switch can continue to operate normally. (2) According to the teachings of the present invention, the lighting device can detect the driving voltage of the light emitting module via the voltage detection module to generate a detection signal, and convert the detection signal into an operating status signal that can display the operating status of the light emitting module. Therefore, the lighting device can accurately detect the operating status of the light emitting module and determine whether the light emitting module is faulty without requiring a controller. In this way, the self-locking control module can appropriately control the power supply module to stop driving the light emitting module and enter a self-locking state. This can significantly reduce the cost of the lighting device and better meet the needs of practical applications. (3) According to the present invention, the lighting device further includes a signal delay module connected to the operating state detection node and the constant voltage source. The above circuit design allows the signal delay module to have a signal delay function. When the operating state detection node generates a high-potential operating state signal indicating an abnormal state, the first Zener diode is destroyed, and the first capacitor is charged by the operating state signal. After the first capacitor is charged, the signal control module is activated, causing the signal control module to activate the self-locking control module and control the power supply module to stop driving the light-emitting module and enter the self-locking state. In this way, the signal delay module accurately responds to the high-potential operating state signal indicating an abnormal state and executes a signal delay program to trigger the signal control module without directly triggering the signal control module to activate the self-locking control module. Therefore, the above signal delay mechanism prevents the self-locking state from being falsely triggered and ensures an appropriate delay time before the self-locking state is triggered. (4) According to the teachings of the present invention, the self-locking control module of the lighting device can perform the self-locking control function by reducing the voltage at the voltage input terminal of the power supply module, thereby effectively increasing the saturation depth. Therefore, the self-locking state will not be released unless the lighting device is switched off and the lighting device is disconnected from the external power source (commercial power, generator, etc.). Therefore, the lighting device can perform the self-locking control function more stably and achieve the desired effect. (5) According to the teachings of the present invention, the circuit design of the lighting device is simple and a special operating mechanism can be provided, so that the lighting device can achieve the desired effect without significantly increasing the cost, thereby improving the practicality of the lighting device, further expanding the range of applications of the lighting device, and providing greater flexibility in use. [Brief explanation of the drawings]

[0017] [Figure 1]1 is a block diagram showing the circuit structure of a lighting device having a fault detection and self-lock control function according to a first embodiment of the present invention. [Figure 2] FIG. 10 is a circuit diagram of a lighting device having a failure detection and self-lock control function according to a second embodiment of the present invention. [Figure 3] FIG. 10 is a first explanatory diagram illustrating a usage scene of a lighting device having a failure detection and self-lock control function according to a third embodiment of the present invention. [Figure 4] FIG. 2 is a second explanatory diagram of a usage scene of the lighting device having the failure detection and self-locking control functions according to the third embodiment of the present invention. [Figure 5] FIG. 10 is a third explanatory diagram of a usage scene of the lighting device having the failure detection and self-locking control functions according to the third embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0018] In the following embodiments, detailed features and advantages of the present invention are described, the contents of which are sufficient to enable those skilled in the art to understand the technical contents of the present invention and implement them accordingly, and the disclosure contents, claims and drawings of this specification allow those skilled in the art to easily understand the objectives and advantages of the present invention.

[0019] Hereinafter, embodiments of a lighting device with fault detection and self-locking control functions of the present invention will be described with reference to the associated drawings. However, for clarity and ease of description in the drawings, the dimensions and proportions of each component in the drawings may be exaggerated or reduced. In the following description and / or claims, when a component is described as being "connected" or "coupled" to another component, this may be directly connected or coupled to the other component, or an intervening component may be present. When a component is described as being "directly connected" or "directly coupled" to another component, this does not mean that an intervening component is present, and other terms describing the relationship between components or layers should be interpreted similarly. For ease of understanding, the same components in the following embodiments will be denoted and described with the same reference numerals.

[0020] FIG. 1 is a block diagram showing the circuit structure of a lighting device with fault detection and self-locking control functions according to a first embodiment of the present invention. As shown in the figure, the lighting device 1 includes a light-emitting module 11, a power supply module 12, a voltage detection module 13, a signal conversion module 14, a signal delay module 15, a self-locking control module 17, and a signal control module 16. The power module 12 is connected to an external power source (such as a commercial power source, a generator, or other similar device) via a switch (such as a wall switch, a ceiling switch, or other similar device). The switch can be connected to multiple lighting devices 1 simultaneously.

[0021] The power supply module 12 is connected to the light-emitting module 11. The power supply module 12 drives the light-emitting module 11. In one embodiment, the power supply module 12 may be a power supply module including a rectifier circuit, a filter circuit, a power factor correction (PFC) circuit, etc. The circuit configuration of the power supply module is well known to those skilled in the art and will not be described in detail here. In one embodiment, the power supply module 12 may be a voltage conversion module such as a buck converter, a boost converter, a buck-boost converter, a flyback converter, or other similar components. In one embodiment, the light-emitting module 11 is a light-emitting diode (LED) or a light-emitting diode array.

[0022] The voltage detection module 13 is connected to the light emitting module 11. The voltage detection module 13 detects the driving voltage of the light emitting module 11 and generates a detection signal.

[0023] The signal conversion module 14 is connected to the voltage detection module 13. The signal conversion module 14 converts the detection signal into an operating status signal.

[0024] The signal delay module 15 is connected to the signal conversion module 14, and the signal control module 16 is connected to the signal delay module 15. The signal conversion module 14 transmits an operating status signal to the signal control module 16 via the signal delay module 15.

[0025] The self-locking control module 17 is connected to the power supply module 12 and the signal control module 16 .

[0026] The signal control module 16 controls the self-locking control module 17 according to the operating state signal. When the operating state signal is in an abnormal state, the signal control module 16 turns on the signal delay module 15 to activate the self-locking control module 17. Then, the self-locking control module 17 controls the power supply module 12 to stop driving the light-emitting module 11 and make it enter a self-locking state. Conversely, when the operating state signal is in a normal state, the signal control module 16 does not turn on the signal delay module 15 and makes the self-locking control module 17 maintain an off state.

[0027] From the above, it can be seen that the signal control module 16 can control the self-locking control module 17 via the signal delay module 15 according to the operating status signal. That is, when the operating status signal is in an abnormal state, the signal control module 16 activates the self-locking control module 17 via the signal delay module 15, causing the self-locking control module 17 to control the power module 12, stop driving the light-emitting module 11, and enter a self-locking state. By combining the above-mentioned fault detection and self-locking control functions, if a lighting device 1 fails and starts flashing, the lighting device 1 automatically enters a self-locking state. Therefore, the user does not need to turn off the switch corresponding to this lighting device 1, and other lighting devices 1 connected to this switch can continue to operate normally.

[0028] Of course, this embodiment is only used for illustrative purposes and does not limit the scope of the present invention, and any equivalent modifications or variations made based on the lighting device with fault detection and self-locking control functions of this embodiment should still fall within the protection scope of the present invention.

[0029] 2 is a circuit diagram of a lighting device with fault detection and self-locking control functions according to a second embodiment of the present invention. As shown in the figure, the lighting device 1 includes a light-emitting module 11, a power supply module 12, a voltage detection module 13, a signal conversion module 14, a signal delay module 15, a self-locking control module 17, and a signal control module 16. The power module 12 is connected to an external power source (such as a mains power supply, a generator, or other similar device) via a switch (such as a wall switch, a ceiling switch, or other similar device). The switch can be connected to multiple lighting devices 1 simultaneously.

[0030] The power supply module 12 is connected to the light emitting module 11, and is also connected to the voltage detection module 13 and the signal conversion module 14. The power supply module 12 drives the light emitting module 11. In this embodiment, the light emitting module 11 includes a plurality of light emitting diodes LD connected in series. In this embodiment, the power supply module 12 is a buck converter and includes a first transistor G1, a first resistor R1, a first inductor L1, and a second diode D2. In this embodiment, the first transistor G1 may be a metal oxide semiconductor field effect transistor (MOSFET). In another embodiment, the first transistor G1 may be a biased junction transistor (BJT) or other similar component.

[0031] The voltage detection module 13 is connected to the light emitting module 11. The voltage detection module 13 detects the driving voltage of the light emitting module 11 and generates a detection signal. The voltage detection module 13 includes a second resistor R2, a third resistor R3, a fourth resistor R4, a second capacitor C2, a second Zener diode DZ2, and a detection point DP. The second capacitor C2 may be an electrolytic capacitor. The second resistor R2, the third resistor R3, and the fourth resistor R4 are connected in series to form a series circuit, and the second capacitor C2 is connected in parallel to this series circuit. The detection point DP is located between the third resistor R3 and the fourth resistor R4, and the negative electrode of the second Zener diode DZ2 is connected to the detection point DP.

[0032] The signal conversion module 14 is connected to the voltage detection module 13. The signal conversion module 14 converts the detection signal into an operating status signal. The signal conversion module 14 includes an optical coupler LW, a fifth resistor R5, and an operating status detection node P1. The operating status detection node P1 is connected to the signal delay module 15 and a constant voltage source Vbus and is used to output the operating status signal. The constant voltage source Vbus can be provided by a power supply module (as mentioned above, the circuit configuration of the power supply module should be familiar to those skilled in the art and will not be described in detail here). Two input terminals of the optical coupler LW are connected to the voltage detection module 13, and one input terminal of the signal conversion module 14 is connected to the positive terminal of the second Zener diode DZ2. The optical coupler LW has two output terminals, one output terminal of which is connected to the operating status detection node P1 via the fifth resistor R5, and the other output terminal of the optical coupler LW is connected to ground GND.

[0033] The signal delay module 15 is connected to the signal conversion module 14, and the signal control module 16 is connected to the signal delay module 15. The signal delay module 15 includes a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a first Zener diode DZ1, a first diode D1, and a first capacitor C1. The operating state detection node P1 is connected to a constant voltage source Vbus via the seventh resistor R7 and the sixth resistor R6 and to ground GND via the eighth resistor R8. The operating state detection node P1 is connected to the negative terminals of the first diode D1 and the first Zener diode DZ1 (the operating state detection node P1 is connected to the positive terminal of the first diode D1, and the negative terminal of the first diode D1 is connected to the negative terminal of the first Zener diode DZ1). The positive terminal of the first Zener diode DZ1 is connected to one end of the first capacitor C1 via the ninth resistor R9. The other end of the first capacitor C1 is connected to ground GND.

[0034] The signal control module 16 includes a tenth resistor R10, an eleventh resistor R11, a second transistor G2, and a third capacitor C3. One end of the tenth resistor R10 is connected to one end of the ninth resistor R9 and one end of the first capacitor C1. The eleventh resistor R11 and the third capacitor C3 are connected in parallel to form a parallel circuit, and the other end of the tenth resistor R10 is connected to ground GND through this parallel circuit. In this embodiment, the second transistor G2 may be a metal-oxide semiconductor field-effect transistor (MOSFET). The gate of the second transistor G2 is connected to the other end of the tenth resistor R10 and one end of the parallel circuit, the source of the second transistor G2 is connected to ground GND, and the drain of the second transistor G2 is connected to the self-locking control module 17. In another embodiment, the second transistor G2 may be a bias junction transistor (BJT) or other similar component.

[0035] The self-locking control module 17 includes a first switch Q1, a second switch Q2, and a twelfth resistor R12. In this embodiment, the first switch Q1 and the second switch Q2 may be triodes (BJTs). The collector of the first switch Q1 is connected to the drain of the second transistor G2 and the base of the second switch Q2. The base of the first switch Q1 is connected to the collector of the second switch Q2 and one end of the twelfth resistor R12. The emitter of the first switch Q1 is connected to ground GND. The other end of the twelfth resistor R12 is connected to ground GND. The emitter of the second switch Q2 is connected to an operating voltage power supply Vcc. In this embodiment, the operating voltage power supply Vcc may be the gate of the first transistor G1 of the power supply module 12. In another embodiment, the operating voltage power supply Vcc may be a voltage input terminal of a power supply module.

[0036] When the lighting device 1 is operating normally, the voltage at the detection point DP of the voltage detection module 13 exceeds the default threshold and exceeds the breakdown voltage of the second Zener diode DZ2. The second Zener diode DZ2 then enters a conductive state. Therefore, the optical coupler LW is turned on when the detection signal exceeds the threshold, and the operating status detection node P1 of the signal conversion module 14 can be connected to the ground point GND via the fifth resistor P5. At the same time, the fifth resistor R5 and the eighth resistor R8 are connected in parallel to generate a low-potential operating status signal indicating a normal state. In this way, the operating status detection node P1 can present a working status signal. In this case, the first Zener diode DZ1 is not broken down when the operating status detection node P1 generates a low-potential operating status signal indicating a normal state, causing the signal delay module 15 to remain in an off state.

[0037] Conversely, if the lighting device 1 malfunctions, the light-emitting module 11 flashes, causing the voltage at the detection node DP of the voltage detection module 13 to fall below the threshold and below the breakdown voltage of the second Zener diode DZ2. Therefore, when the detection signal falls below the threshold, the optical coupler LW turns off, disconnecting the operating status detection node P1 from the ground node GND. At the same time, the fifth resistor R5 and the eighth resistor R8 become anti-parallel. The constant voltage source Vbus then generates a high-potential operating status signal at the operating status detection node P1, indicating an abnormality. In this case, the first Zener diode DZ1 breaks down when the operating status detection node P1 generates a high-potential operating status signal indicating an abnormality, allowing the constant voltage source Vbus to charge the first capacitor C1. When the first capacitor C1 is fully charged, the second transistor G2 turns on, activating the signal control module 16. Next, the base voltage of the second switch Q2 pulls down the second transistor G2, turning on the second switch Q2 and activating the self-locking control module 17, causing the self-locking control module 17 to control the power supply module 12 to stop driving the light-emitting module 11 and enter the self-locking state. Finally, current flows out of the operating voltage power supply Vcc through the second switch Q2 and the twelfth resistor R12, increasing the saturation depth and maintaining the self-locking state. As long as the lighting device 1 is not disconnected from the external power supply, it can continue to maintain the self-locking state.

[0038] From the above, it can be seen that the lighting device 1 detects the driving voltage of the light emitting module 11 via the voltage detection module 13 to generate a detection signal, and converts the detection signal via the signal conversion module 14 into an operating status signal that can represent the operating status of the light emitting module 11. Therefore, the lighting device 1 can accurately detect the operating status of the light emitting module 11 and determine a fault in the light emitting module 11 without requiring a controller. In this way, the self-locking control module 17 can appropriately control the power supply module 12 to stop driving the light emitting module 11 and enter a self-locking state. This can significantly reduce the cost of the lighting device 1 and better meet the needs of practical applications.

[0039] The lighting device 1 also includes a signal delay module 15 connected to the operating state detection node P1 and the constant voltage source Vbus. The above circuit design allows the signal delay module 15 to have a signal delay function. When the operating state detection node P1 generates a high-potential operating state signal indicating an abnormal state, the first Zener diode DZ1 is destroyed, and the first capacitor C1 is charged by the operating state signal. After the first capacitor C1 is charged, the signal control module 16 is activated, causing the signal control module 16 to activate the self-locking control module 17, which controls the power supply module 12 to stop driving the light-emitting module 11 and enter the self-locking state. In this way, the signal delay module 15 accurately responds to the high-potential operating state signal indicating an abnormal state and triggers the signal control module 16 by appropriately processing the operating state signal and executing a signal delay program, rather than directly triggering the signal control module 16 to activate the self-locking control module 17. Therefore, the above signal delay mechanism prevents the self-locking state from being falsely triggered and ensures an appropriate delay time before the self-locking state is activated.

[0040] Furthermore, the self-locking control module 17 of the lighting device 1 can perform the self-locking control function by reducing the voltage at the voltage input terminal (gate of the first transistor G1) of the power supply module 12, thereby effectively increasing the saturation depth. Therefore, the self-locking state will not be released unless the lighting device 1 is switched off and the connection between the lighting device 1 and the external power source (commercial power supply, generator, etc.) is cut off. Therefore, the lighting device 1 can perform the self-locking control function more stably and achieve the desired effect.

[0041] Of course, this embodiment is only used for illustrative purposes and does not limit the scope of the present invention, and any equivalent modifications or variations made based on the lighting device with fault detection and self-locking control functions of this embodiment should still fall within the protection scope of the present invention.

[0042] Generally, multiple switches are installed in a building, and one switch may be required to control two or more lighting devices. If one lighting device malfunctions and starts flashing, a user can only flip the switch corresponding to that lighting device. This will simultaneously turn off other lighting devices connected to that switch, resulting in a lack of lighting in some areas of the building. If the user does not turn off the switch, the malfunctioning lighting device will continue to flash, affecting the user's normal work. In contrast, according to the first and second embodiments of the present invention, a lighting device includes a light-emitting module, a power supply module, a voltage detection module, a signal conversion module, a self-locking control module, and a signal control module. The power supply module drives the light-emitting module. The voltage detection module detects the driving voltage of the light-emitting module and generates a detection signal. The signal conversion module converts the detection signal into an operating status signal. The self-locking control module controls the power supply module. The signal control module controls the self-locking control module according to the operating status signal. When the operating status signal is in an abnormal state, the signal control module activates the self-locking control module, which then controls the power supply module to stop driving the light-emitting module and enter a self-locking state. By combining the above-mentioned fault detection function and self-locking control function, if a lighting device fails and starts flashing, the lighting device will automatically enter a self-locking state. Therefore, the user does not need to turn off the switch corresponding to this lighting device, and other lighting devices connected to this switch can continue to operate normally.

[0043] Furthermore, according to the first and second embodiments of the present invention, the lighting device can detect the driving voltage of the light emitting module via the voltage detection module to generate a detection signal, and convert the detection signal into an operating status signal that can display the operating status of the light emitting module. Therefore, the lighting device can accurately detect the operating status of the light emitting module and determine whether the light emitting module is faulty without requiring a controller. In this way, the self-locking control module can appropriately control the power supply module to stop driving the light emitting module and enter a self-locking state. This can significantly reduce the cost of the lighting device and better meet the needs of practical applications.

[0044] According to the first and second embodiments of the present invention, the lighting device further includes a signal delay module connected to the operating state detection node and the constant voltage source. The above circuit design allows the signal delay module to have a signal delay function. When the operating state detection node generates a high-potential operating state signal indicating an abnormal state, the first Zener diode is destroyed, and the first capacitor is charged by the operating state signal. After the first capacitor is charged, the signal control module is activated, causing the signal control module to activate the self-locking control module and control the power supply module to stop driving the light-emitting module and enter the self-locking state. In this way, the signal delay module accurately responds to the high-potential operating state signal indicating an abnormal state and executes a signal delay program to trigger the signal control module without directly triggering the signal control module to activate the self-locking control module. Therefore, the above signal delay mechanism prevents the self-locking state from being falsely triggered and ensures an appropriate delay time before the self-locking state is triggered.

[0045] Furthermore, according to the first and second embodiments of the present invention, the self-locking control module of the lighting device can perform the self-locking control function by reducing the voltage at the voltage input terminal of the power supply module, thereby effectively increasing the saturation depth. Therefore, the self-locking state will not be released unless the lighting device is switched off and the connection between the lighting device and the external power source (commercial power, generator, etc.) is cut off. Therefore, the lighting device can perform the self-locking control function more stably and achieve the desired effect.

[0046] Furthermore, according to the first and second embodiments of the present invention, the circuit design of the lighting device is simple and a special operating mechanism can be provided, allowing the lighting device to achieve the desired effect without significantly increasing costs. Therefore, the practicality of the lighting device is improved, the application range of the lighting device is further expanded, and it is more flexible in use. From the above, it can be seen that the lighting device with fault detection and self-locking control functions according to the embodiments of the present invention can indeed achieve excellent technical effects.

[0047] 3 is a first explanatory diagram of a usage scenario of a lighting device having a fault detection and self-locking control function according to a third embodiment of the present invention. As shown in the figure, a building BD is provided with a plurality of lighting devices 1 (only three lighting devices 1 are shown in FIG. 3), and wall switches WS are used to control these lighting devices 1.

[0048] Of course, this embodiment is only used for illustrative purposes and does not limit the scope of the present invention, and any equivalent modifications or variations made based on the lighting device with fault detection and self-locking control functions of this embodiment should still fall within the protection scope of the present invention.

[0049] 4 is a second explanatory diagram illustrating a usage scenario of the lighting device 1 having the fault detection and self-locking control functions according to the third embodiment of the present invention. As shown in the figure, a user UR can turn on these lighting devices 1 by pressing a wall switch WS.

[0050] Of course, this embodiment is only used for illustrative purposes and does not limit the scope of the present invention, and any equivalent modifications or variations made based on the lighting device with fault detection and self-locking control functions of this embodiment should still fall within the protection scope of the present invention.

[0051] 5 is a third explanatory diagram of a usage scenario of a lighting device with fault detection and self-locking control functions according to the third embodiment of the present invention. As shown in the figure, even if one of the lighting devices 1 fails and starts flashing, the other lighting devices 1 can continue to operate normally, and the lighting device 1 can automatically enter the self-locking state described above.

[0052] From the above, it can be seen that by combining the above-mentioned fault detection function and self-locking control function, if the lighting device 1 fails and starts flashing, the lighting device 1 will automatically enter a self-locking state. Therefore, the user does not need to turn off the wall switch WS, and other lighting devices 1 connected to the wall switch WS can continue to operate normally.

[0053] Furthermore, the lighting device 1 has a simple circuit design and can provide a special operating mechanism, so that the lighting device 1 can achieve the desired effect without significantly increasing costs, thereby improving the practicality of the lighting device 1, broadening the range of applications of the lighting device 1, and increasing the degree of freedom in use.

[0054] Of course, this embodiment is only used for illustrative purposes and does not limit the scope of the present invention, and any equivalent modifications or variations made based on the lighting device with fault detection and self-locking control functions of this embodiment should still fall within the protection scope of the present invention.

[0055] In summary, according to the first, second, and third embodiments of the present invention, a lighting device includes a light-emitting module, a power supply module, a voltage detection module, a signal conversion module, a self-locking control module, and a signal control module. The power supply module drives the light-emitting module. The voltage detection module detects the driving voltage of the light-emitting module and generates a detection signal. The signal conversion module converts the detection signal into an operating status signal. The self-locking control module controls the power supply module. The signal control module controls the self-locking control module according to the operating status signal. When the operating status signal is in an abnormal state, the signal control module activates the self-locking control module, which controls the power supply module to stop driving the light-emitting module and enter a self-locking state. By combining the above-mentioned fault detection function and self-locking control function, if a lighting device malfunctions and starts flashing, the lighting device automatically enters a self-locking state. Therefore, the user does not need to turn off the switch corresponding to the lighting device, and other lighting devices connected to the switch can continue to operate normally.

[0056] Furthermore, according to the first, second, and third embodiments of the present invention, the lighting device can detect the driving voltage of the light emitting module via the voltage detection module to generate a detection signal, and convert the detection signal into an operating status signal that can display the operating status of the light emitting module. Therefore, the lighting device can accurately detect the operating status of the light emitting module and determine whether the light emitting module is faulty without requiring a controller. In this way, the self-locking control module can appropriately control the power supply module to stop driving the light emitting module and enter a self-locking state. This can significantly reduce the cost of the lighting device and better meet the needs of practical applications.

[0057] According to the first, second, and third embodiments of the present invention, the lighting device further includes a signal delay module connected to the operating state detection node and the constant voltage source. The above circuit design allows the signal delay module to have a signal delay function. When the operating state detection node generates a high-potential operating state signal indicating an abnormal state, the first Zener diode is destroyed, and the first capacitor is charged by the operating state signal. After the first capacitor is charged, the signal control module is activated, causing the signal control module to activate the self-locking control module and control the power supply module to stop driving the light-emitting module and enter the self-locking state. In this way, the signal delay module accurately responds to the high-potential operating state signal indicating an abnormal state and executes a signal delay program to trigger the signal control module without directly triggering the signal control module to activate the self-locking control module. Therefore, the above signal delay mechanism prevents the self-locking state from being falsely triggered and ensures an appropriate delay time before the self-locking state is triggered.

[0058] Furthermore, according to the first, second, and third embodiments of the present invention, the self-locking control module of the lighting device can perform the self-locking control function by reducing the voltage at the voltage input terminal of the power supply module, thereby effectively increasing the saturation depth. Therefore, the self-locking state will not be released unless the lighting device is switched off and the connection between the lighting device and the external power source (commercial power supply, generator, etc.) is cut off. Therefore, the lighting device can perform the self-locking control function more stably and achieve the desired effect.

[0059] Furthermore, according to the first, second and third embodiments of the present invention, the circuit design of the lighting device is simple and a special operating mechanism can be provided, so that the lighting device can achieve the desired effect without significantly increasing the cost, thereby improving the practicality of the lighting device, further expanding the application range of the lighting device, and providing more flexibility in use.

[0060] Although the above embodiments are described in this specification, it should be noted that they do not limit the scope of the claims of the present invention. Therefore, any changes and modifications to the embodiments described in this specification based on the innovative concept of the present invention, or the replacement of equivalent structures or equivalent processes made using the contents of the specification and drawings of the present invention, or the direct or indirect application of the above technical solutions to other related technical fields, are all within the scope of the claims of the present invention. [Explanation of symbols]

[0061] 1. Lighting equipment 11 Light-emitting module 12 Power Supply Modules 13 Voltage detection module 14 Signal conversion module 15 Signal Delay Module 16 Signal Control Module 17 Self-locking control module G1 First transistor G2 Second transistor Q1 First switch Q2 Second switch L1 First inductor D1 First diode D2 Second diode DZ1 First Zener diode DZ2 Second Zener diode C1 First capacitor C2 Second capacitor 3 Third capacitor R1 First resistor R2 2nd resistor R3 3rd resistor R4 4th resistor R5 5th resistor R6 6th resistor R7 7th resistor R8 8th resistor R9 9th resistor R10 10th resistor R11 11th resistor R12 12th resistor LD Light Emitting Diode LW optical coupler GND grounding point P1 Operational status detection node DP detection point Vbus constant voltage source Vcc operating voltage source UR User WS Wall Switch BD Building

Claims

1. a light-emitting module; a power supply module that drives the light emitting module; a voltage detection module for detecting a driving voltage of the light emitting module and generating a detection signal; a signal conversion module that converts the detection signal into an operating status signal and includes an optical coupler; a signal delay module; a self-locking control module that controls the power supply module; a signal control module that transmits the operation status signal to a signal control module through the signal delay module and controls the self-locking control module according to the operation status signal; Equipped with the signal conversion module has an operating state detection node, the operating state detection node is connected to the signal delay module and a constant voltage source, and presents the operating state signal; two output ends of the optical coupler of the signal conversion module are respectively connected to the operating state detection node and a ground; the optical coupler is turned on when the detection signal is greater than a threshold, causing the operating state signal to be at a low potential at the operating state detection node and the ground, which indicates a normal state; the optical coupler is turned off when the detection signal is lower than the threshold, disconnecting the operating state detection node and the ground, and generating the operating state signal at a high potential, which indicates an abnormal state; the signal delay module is turned on when the operating state signal is in the abnormal state, causing the signal control module to activate the signal control module, which causes the signal control module to activate the self-locking control module, which causes the self-locking module to perform a self-locking control function by reducing the voltage at the voltage input end of the power supply module, and controlling the power supply module to stop driving the light emitting module and enter the self-locking state.

2. 2. The lighting device with fault detection and self-locking control functions according to claim 1, wherein the constant voltage source is provided by a power supply module.

3. 2. The lighting device with fault detection and self-locking control functions of claim 1, wherein the signal delay module includes a first Zener diode and a first capacitor, the operating state detection node is connected to a negative electrode of the first Zener diode, a positive electrode of the first Zener diode is connected to one end of the first capacitor, and the other end of the first capacitor is connected to the ground point, and the first Zener diode is destroyed when the operating state detection node is at a high potential and generates the operating state signal indicating an abnormal state, and charges the first capacitor with the operating state signal. After the first capacitor is fully charged, the signal control module is driven to have the signal control module drive the self-locking control module to control the power supply module, stop driving the light-emitting module, and enter the self-locking state.

4. 4. The lighting device with fault detection and self-locking control functions according to claim 3, wherein the first Zener diode is not destroyed when the operation status detection node is at a low potential and generates the operation status signal representing the normal state, causing the signal delay module to maintain an off state.

5. The lighting device with fault detection and self-locking control functions according to claim 1 , wherein the power supply module is a power supply module or a voltage conversion module.

6. 2. The lighting device with fault detection and self-locking control functions according to claim 1, wherein the light-emitting module is a light-emitting diode or a light-emitting diode array.

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