Lighting device with fault detection and self-locking control function

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, particularly a lighting device equipped with a fault detection and self-lock control function.

Background Art

[0002] Generally, in a building, usually, a plurality of switches are installed, and it may be necessary to control two or more lighting devices with one switch. If any one of the lighting devices fails and blinks, the user can only switch the switch corresponding to that lighting device. Then, the other lighting devices connected to that switch will also turn off at the same time, resulting in insufficient lighting in some areas of the building. If the user does not turn off the switch, the faulty lighting device will continue to blink, affecting the user's normal work. Although the circuit designs of lighting devices are also disclosed in Chinese Utility Model Registration No. 219761368 and Chinese Patent Application Publication No. 116056281, the above problems still cannot be effectively solved.

[0003] Therefore, how to propose a lighting device that can effectively solve the above problems has become an urgent issue.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0005] An object of the present invention is to provide a lighting device equipped with a fault detection and self-lock control function.

Means for Solving the Problems

[0006] The present invention provides an illumination device having a failure detection and self-lock control function, including a light-emitting module, a power supply module, a voltage detection module, a signal conversion module, a self-lock 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 state signal. The self-lock control module controls the power supply module. The signal control module controls the self-lock control module according to the operating state signal. When the operating state signal is in an abnormal state, the signal control module activates the self-lock control module, and the self-lock control module controls the power supply module to stop driving the light-emitting module and enter the self-lock state.

[0007] As an improvement of the present invention, the illumination device further includes a signal delay module. 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, when the operating state signal is in an abnormal state, the signal delay module is conducted to activate the signal control module, and the signal control module activates the self-lock control module to control the power supply module, stop driving the light-emitting module, and enter the self-lock state.

[0009] As an improvement of the present invention, 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 an operating state signal.

[0010] As an improvement of the present invention, the constant voltage source is provided by a power supply module.

[0011] As an improvement of the present invention, the signal conversion module includes an optical coupler. The two output terminals of the optical coupler are respectively connected to the operating state detection node and the ground point. The optical coupler is turned on when the detection signal is greater than the threshold value, and generates an operating state signal that is at a low potential and represents a normal state at the operating state detection node and the ground point. The photodetector is turned off when the detection signal is lower than the threshold value, disconnects the operating state detection node and the ground point, and generates an operating state signal that is at a high potential and represents an abnormal state.

[0012] As an 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 the ground point. The first Zener diode is destroyed when the operating state detection node generates an operating state signal that is at a high potential and represents an abnormal state, and charges the first capacitor with the operating state signal. After the charging of the first capacitor is completed, the signal control module is driven, and the signal control module drives the self-lock control module to control the power supply module, stops driving the light-emitting module, and enters the self-lock state.

[0013] As an improvement of the present invention, the first Zener diode is not destroyed when the operating state detection node generates an operating state signal that is at a low potential and represents a normal state, and maintains the off state of the signal delay module.

[0014] As an improvement of the present invention, the power supply module is a power supply module or a voltage conversion module.

[0015] As an improvement of the present invention, the light-emitting module is a light-emitting diode or a light-emitting diode array.

Advantages of the Invention

[0016] Based on the above, the lighting device with a fault detection and self-lock control function according to the embodiment of the present invention can have one or more of the following advantages. (1) According to the disclosure of the present invention, the lighting device includes a light emitting module, a power supply module, a voltage detection module, a signal conversion module, a self-lock 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 state signal. The self-lock control module controls the power supply module. The signal control module controls the self-lock control module according to the operating state signal. When the operating state signal is in an abnormal state, the signal control module activates the self-lock control module, and the self-lock control module controls the power supply module to stop driving the light emitting module and enter the self-lock state. By combining the above fault detection function and self-lock control function, when the lighting device fails and blinks, the lighting device automatically enters the self-lock 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. (2) According to the content disclosed by the present invention, the lighting device can detect the driving voltage of the light emitting module through the voltage detection module to generate a detection signal, and convert the detection signal into an operating state signal capable of indicating the operating state of the light emitting module. Therefore, without the need for a controller, the lighting device can accurately curl the operating state of the light emitting module to determine whether the light emitting module is faulty. In this way, the self-lock control module can appropriately control the power supply module to stop driving the light emitting module and enter the self-lock state. Therefore, the cost of the lighting device can be significantly reduced, and the actual application requirements can be better met. (3) According to the content disclosed by the present invention, the lighting device further includes a signal delay module connected to the operating state detection node and the constant voltage source. With the above circuit design, the signal delay module can have a signal delay function. When the operating state detection node generates an operating state signal of high potential indicating an abnormal state, the first Zener diode is damaged, and the first capacitor is charged by the operating state signal. After the first capacitor is charged, the signal control module is activated, the self-lock control module in the signal control module is activated, the power supply module is controlled, and the driving of the light-emitting module is stopped to enter the self-lock state. In this way, the signal delay module accurately responds to the operating state signal of high potential indicating an abnormal state, executes the signal delay program to trigger the signal control module without directly triggering the signal control module to activate the self-lock control module. Therefore, the above signal delay mechanism can prevent the self-lock state from being accidentally triggered and ensure an appropriate delay time until the self-lock state is triggered. (4) According to the content disclosed by the present invention, the self-lock control module of the lighting device can execute the self-lock control function by a mechanism that reduces the voltage at the voltage input end of the power supply module, and can effectively increase the saturation depth. Therefore, the self-lock state will not be released unless the switch of the lighting device is turned off to cut off the connection between the lighting device and an external power supply (such as a commercial power supply, a generator, etc.). Therefore, the lighting device can more stably execute the self-lock control function to achieve the desired effect. (5) According to the content disclosed by the present invention, the circuit design of the lighting device is simple and can provide a special operating mechanism. Therefore, the lighting device can obtain the desired effect without significantly increasing the cost. Therefore, the practicality of the lighting device is improved, the application range of the lighting device is further expanded, and it can also have more flexibility in use.

Brief Description of the Drawings

[0017]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Modes for Carrying Out the Invention

[0018] In the following embodiments, the detailed features and advantages of the present invention will be described. The content is sufficient for those skilled in the art to understand the technical content of the present invention and to enable its implementation accordingly, and it enables those skilled in the art to easily understand the objectives and advantages of the present invention based on the disclosure content, claims, and drawings of this specification.

[0019] Hereinafter, with reference to the relevant drawings, embodiments of an illumination device having a failure detection and self-lock control function of the present invention will be described. However, for the sake of easy understanding and easy explanation in the drawings, the members in the drawings may be shown with exaggerated or reduced dimensions and ratios. In the following description and / or claims, when it is stated that a member "connects" or "couples" to another member, it may directly connect or couple to the said another member, and there may be an intervening member. When it is stated that a member "directly connects" or "directly couples" to another member, there is no intervening member, and the same should be interpreted for other terms used to explain the relationship between members or layers. For easy understanding, the same members in the following embodiments will be described with the same reference numerals.

[0020] FIG. 1 is a block diagram showing a circuit structure of an illumination device having a failure detection and self-locking control function according to a first embodiment of the present invention. As shown in the figure, the illumination 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 members) via a switch (such as a wall switch, a ceiling switch, or other similar members). The above switch can be connected to a plurality of illumination 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. Since the circuit configuration of the power supply module is well known to those skilled in the art, it 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, or a flyback converter or other similar members. 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 state 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 the operating state signal to the signal control module 16 via the signal delay module 15.

[0025] The self-lock 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-lock 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-lock control module 17. Then, the self-lock control module 17 controls the power supply module 12 to stop driving the light-emitting module 11 and enter the self-lock 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 keeps the self-locking control module 17 in the off state.

[0027] From the above, it can be seen that the signal control module 16 can control the self-lock control module 17 via the signal delay module 15 according to the operating state signal. That is, when the operating state signal is in an abnormal state, the signal control module 16 activates the self-lock control module 17 via the signal delay module 15, and causes the self-lock control module 17 to control the power module 12 to stop driving the light-emitting module 11 and enter the self-lock state. By combining the above-mentioned fault detection and self-lock control functions, when the lighting device 1 fails and blinks, the lighting device 1 automatically enters the self-lock 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 explanation and does not limit the scope of the present invention. Equivalent modifications or changes made based on the lighting device with a fault detection and self-locking control function of this embodiment should still be included in the protection scope of the present invention.

[0029] Figure 2 is a circuit diagram of a lighting device with a fault detection and self-locking control function according to the second embodiment of the present invention. As shown in the figure, the lighting device 1 includes a light-emitting module 11, a power 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 main power source, a generator, or other similar members) via a switch (such as a wall switch, a ceiling switch, or other similar members). The above switch can be connected to a plurality of lighting devices 1 simultaneously.

[0030] The power 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 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 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 bipolar junction transistor (BJT) or other similar members.

[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 state signal. The signal conversion module 14 includes an optocoupler LW, a fifth resistor R5, and an operating state detection node P1. The operating state detection node P1 is connected to the signal delay module 15 and the constant voltage source Vbus and is used to present the operating state signal. The constant voltage source Vbus can be provided by the power supply module (as described above, since the circuit configuration of the power supply module should be well known to those skilled in the art, it will not be described in detail here). The two input terminals of the optocoupler LW are connected to the voltage detection module 13, and one input end of the signal conversion module 14 is connected to the positive electrode of the second Zener diode DZ2. The optocoupler LW has two output terminals. One output end is connected to the operating state detection node P1 via the fifth resistor R5, and the other output end of the optocoupler LW is connected to the ground point 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 the constant voltage source Vbus via the seventh resistor R7 and the sixth resistor R6, and is connected to the ground point GND via the eighth resistor R8. The operating state detection node P1 is connected to the negative electrodes of the first diode D1 and the first Zener diode DZ1 (the operating state detection node P1 is connected to the positive electrode of the first diode D1, and the negative electrode of the first diode D1 is connected to the negative electrode of the first Zener diode DZ1), and the positive electrode 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 the ground point 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 the ground point GND via 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 the ground point GND, and the drain of the second transistor G2 is connected to the self-lock control module 17. In another embodiment, the second transistor G2 may be a bipolar junction transistor (BJT) or other similar member.

[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 bipolar junction transistors (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 the ground point GND. The other end of the twelfth resistor R12 is connected to the ground point GND. The emitter of the second switch Q2 is connected to the 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 the voltage input terminal of the 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 is greater than the default threshold value and greater than the breakdown voltage of the second Zener diode DZ2. Thereafter, the second Zener diode DZ2 becomes conductive. Therefore, the optocoupler LW turns on when the detection signal is greater than the threshold value, and the operating state 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, generating an operating state signal with a low potential indicating the normal state. In this way, the operating state detection node P1 can present the operating state signal. In this case, when the operating state detection node P1 generates an operating state signal with a low potential indicating the normal state, the first Zener diode DZ1 is not destroyed and keeps the signal delay module 15 in the off state.

[0037] Conversely, when the lighting device 1 malfunctions, the light-emitting module 11 generates a blinking, causing the voltage at the detection point DP of the voltage detection module 13 to be less than the above threshold value and less than the breakdown voltage of the second Zener diode DZ2. Therefore, when the detection signal is below the threshold value, the optocoupler LW turns off, disconnecting the operating state detection node P1 and the ground point GND. At the same time, the fifth resistor R5 and the eighth resistor R8 become non-parallel. Thereafter, the constant voltage source Vbus can generate an operating state signal with a high potential indicating an abnormal state at the operating state detection node P1. In this case, the first Zener diode DZ1 is destroyed when the operating state detection node P1 generates an operating state signal with a high potential indicating an abnormal state, and the first capacitor C1 can be charged to the constant voltage source Vbus. When the charging of the first capacitor C1 is completed, the second transistor G2 is turned on, starting the signal control module 16. Next, the voltage at the base of the second switch Q2 pulls down the second transistor G2, and the second switch Q2 also turns on, starting the self-lock control module 17. The self-lock control module 17 controls the power module 12 to stop driving the light-emitting module 11 and enter the self-lock state. Finally, the current flows out from the operating voltage power supply Vcc, increases the saturation depth through the second switch Q2 and the twelfth resistor R12, and maintains the self-lock state. As long as the connection between the lighting device 1 and the external power supply is not disconnected, the lighting device 1 can continue to maintain the self-lock state.

[0038] From the above, it can be seen that the lighting device 1 can detect the driving voltage of the light-emitting module 11 through the voltage detection module 13 to generate a detection signal, and through the signal conversion module 14, convert the detection signal into an operating state signal that can represent the operating state of the light-emitting module 11. Therefore, the lighting device 1 can accurately detect the operating state of the light-emitting module 11 and determine the failure of the light-emitting module 11 without the need for a controller. In this way, the self-lock control module 17 can appropriately control the power module 12 to stop driving the light-emitting module 11 and enter the self-lock state. Therefore, the cost of the lighting device 1 can be significantly reduced, and the actual application requirements can be better met.

[0039] In addition, the lighting device 1 further includes a signal delay module 15 connected to the operating state detection node P1 and the constant voltage source Vbus. With the above circuit design, the signal delay module 15 can 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 self-lock control module 17 in the signal control module 16 to be activated, controlling the power supply module 12 to stop driving the light-emitting module 11, and entering the self-lock state. In this way, the signal delay module 15 accurately responds to the high-potential operating state signal indicating an abnormal state, directly triggers the signal control module 16, and processes the operating state signal appropriately without activating the self-lock control module 17 and executes the signal delay program to trigger the signal control module 16. Therefore, the above signal delay mechanism can prevent the self-lock state from being accidentally triggered and ensure an appropriate delay time until the self-lock state is activated.

[0040] In addition, the self-lock control module 17 of the lighting device 1 can execute the self-lock control function by a mechanism that reduces the voltage at the voltage input terminal (gate of the first transistor G1) of the power supply module 12, and can effectively increase the saturation depth. Therefore, the self-lock state is not released unless the switch of the lighting device 1 is turned off to disconnect the connection between the lighting device 1 and an external power supply (commercial power supply, generator, etc.). Therefore, the lighting device 1 can more stably execute the self-lock control function 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. Equivalent modifications or changes made based on the lighting device with the fault detection and self-lock control functions of this embodiment should still be included in the protection scope of the present invention.

[0042] Generally, in a building, usually, a plurality of switches are installed, and it may be necessary to control two or more lighting devices with one switch. When any one of the lighting devices fails and blinks, the user can only switch the switch corresponding to that lighting device. Then, the other lighting devices connected to that switch will also turn off at the same time, resulting in insufficient lighting in some areas of the building. If the user does not turn off the switch, the faulty lighting device will continue to blink, affecting the user's normal work. In contrast, according to the first and second embodiments of the present invention, the lighting device includes a light-emitting module, a power supply module, a voltage detection module, a signal conversion module, a self-lock 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 state signal. The self-lock control module controls the power supply module. The signal control module controls the self-lock control module according to the operating state signal. The signal control module activates the self-lock control module when the operating state signal is in an abnormal state, and the self-lock control module controls the power supply module to stop driving the light-emitting module and enter the self-lock state. By combining the above fault detection function and self-lock control function, when the lighting device fails and blinks, the lighting device automatically enters the self-lock state. Therefore, the user does not need to turn off the switch corresponding to this lighting device, and the other lighting devices connected to this switch can continue to operate normally.

[0043] Also, 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 a voltage detection module to generate a detection signal, and convert the detection signal into an operating state signal capable of indicating the operating state of the light-emitting module. Therefore, the lighting device can accurately detect the operating state of the light-emitting module without requiring a controller and determine whether the light-emitting module is faulty. In this way, the self-lock control module can appropriately control the power supply module to stop driving the light-emitting module and enter the self-lock state. Therefore, the cost of the lighting device can be significantly reduced, and the actual application requirements can be better met.

[0044] Also, according to the first and second embodiments of the present invention, the lighting device further includes a signal delay module connected to an operating state detection node and a constant voltage source. With the above circuit design, the signal delay module can 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, and the signal control module activates the self-lock control module to control the power supply module, stop driving the light-emitting module, and enter the self-lock state. In this way, the signal delay module accurately responds to the high-potential operating state signal indicating an abnormal state, directly triggers the signal control module, and executes a signal delay program to trigger the signal control module without activating the self-lock control module. Therefore, the above signal delay mechanism can prevent the self-lock state from being accidentally triggered and ensure an appropriate delay time until the self-lock state is triggered.

[0045] Also, according to the first and second embodiments of the present invention, the self-lock control module of the lighting device can execute the self-lock control function by a mechanism that reduces the voltage at the voltage input terminal of the power supply module, and can effectively increase the saturation depth. Therefore, the self-lock state will not be released unless the switch of the lighting device is turned off to disconnect the connection between the lighting device and an external power supply (such as a commercial power supply or a generator). Therefore, the lighting device can more stably execute the self-lock control function 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 can provide a special operation mechanism. Therefore, the lighting device can obtain the desired effect without significantly increasing the cost. Therefore, the practicality of the lighting device is improved, the application range of the lighting device is further expanded, and it can be more flexible in use. From the above, it can be seen that the lighting device with a fault detection and self-lock control function based on the embodiments of the present invention can indeed achieve excellent technical effects.

[0047] FIG. 3 is a first explanatory diagram of the usage scenario of the lighting device with a fault detection and self-lock control function according to the third embodiment of the present invention. As shown in the figure, in a building BD, a plurality of lighting devices 1 (only three lighting devices 1 are shown in FIG. 3) are provided, and a wall switch WS is 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. Equivalent modifications or changes made based on the lighting device with a fault detection and self-lock control function of this embodiment should still be included in the protection scope of the present invention.

[0049] FIG. 4 is a second explanatory diagram of the usage scenario of the lighting device with a fault detection and self-lock control function 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 the wall switch WS.

[0050] Of course, this embodiment is only used for illustrative purposes and does not limit the scope of the present invention. Equivalent modifications or changes made based on the lighting device with the fault detection and self-lock control functions of this embodiment should still be included in the protection scope of the present invention.

[0051] FIG. 5 is a third explanatory diagram of the usage scenario of the lighting device with the fault detection and self-lock 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 blinks, the other lighting devices 1 can automatically enter the aforementioned self-lock state while operating normally.

[0052] From the above, it can be seen that when the lighting device 1 fails and blinks due to the combination of the above-mentioned fault detection function and self-lock control function, the lighting device 1 can automatically enter the self-lock state. Therefore, the user does not need to turn off the wall switch WS, and the other lighting devices 1 connected to the wall switch WS can continue to operate normally.

[0053] In addition, since the circuit design of the lighting device 1 is simple and can provide a special operation mechanism, the lighting device 1 can achieve the desired effect without significantly increasing the cost. Therefore, the practicality of the lighting device 1 is improved, the usage range of the lighting device 1 is expanded, and the degree of freedom of use is increased.

[0054] Of course, this embodiment is only used for illustrative purposes and does not limit the scope of the present invention. Equivalent modifications or changes made based on the lighting device with the fault detection and self-lock control functions of this embodiment should still be included in the protection scope of the present invention.

[0055] In summary, according to the first, second, and third embodiments of the present invention, the lighting device includes a light-emitting module, a power supply module, a voltage detection module, a signal conversion module, a self-lock 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 state signal. The self-lock control module controls the power supply module. The signal control module controls the self-lock control module according to the operating state signal. When the operating state signal is in an abnormal state, the signal control module activates the self-lock control module, and the self-lock control module controls the power supply module to stop driving the light-emitting module and enter the self-lock state. By combining the above fault detection function and self-lock control function, when the lighting device fails and blinks, the lighting device automatically enters the self-lock 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.

[0056] Also, 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 through the voltage detection module to generate a detection signal, and convert the detection signal into an operating state signal capable of indicating the operating state of the light-emitting module. Therefore, the lighting device can accurately determine whether the light-emitting module is faulty without the need for a controller. In this way, the self-lock control module can appropriately control the power supply module to stop driving the light-emitting module and enter the self-lock state. Therefore, the cost of the lighting device can be significantly reduced, and the actual application requirements can be better met.

[0057] Also, 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. With the above circuit design, the signal delay module can have a signal delay function. When the operating state detection node generates an operating state signal with a high potential 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 self-lock control module in the signal control module to be activated, controlling the power supply module, and stopping the driving of the light-emitting module to enter the self-lock state. In this way, the signal delay module accurately responds to the operating state signal with a high potential indicating an abnormal state, executes a signal delay program to trigger the signal control module without directly triggering the self-lock control module to be activated. Therefore, the above signal delay mechanism can prevent the self-lock state from being accidentally triggered and ensure an appropriate delay time until the self-lock state is triggered.

[0058] Also, according to the first, second, and third embodiments of the present invention, the self-lock control module of the lighting device can execute a self-lock control function by a mechanism that reduces the voltage at the voltage input terminal of the power supply module, and can effectively increase the saturation depth. Therefore, the self-lock state will not be released unless the switch of the lighting device is turned off to cut off the connection between the lighting device and an external power source (such as a commercial power supply, a generator, etc.). Therefore, the lighting device can more stably execute the self-lock control function to 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 can provide a special operating mechanism. Therefore, the lighting device can obtain the desired effect without significantly increasing the cost. Therefore, the practicality of the lighting device is improved, the application range of the lighting device is further expanded, and it can also have more flexibility in use.

[0060] Although each of the above embodiments has been described in this specification, it should be noted that this does 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 substitutions of equivalent structures or equivalent processes made using the content of the specification and drawings of the present invention, or direct or indirect application of the above technical solutions to other related technical fields, are all included in the scope of the claims of the present invention.

Explanation of Reference Numerals

[0061] 1 Lighting device 11 Light-emitting module 12 Power supply module 13 Voltage detection module 14 Signal conversion module 15 Signal delay module 16 Signal control module 17 Self-lock 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 Second resistor R3 Third resistor R4 Fourth resistor R5 Fifth resistor R6 Sixth resistor R7 Seventh resistor R8 Eighth resistor R9 Ninth resistor R10 Tenth resistor R11 Eleventh resistor R12 12th Resistance LD Light Emitting Diode LW Optical Coupler GND Ground Point P1 Operating State 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 for driving 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 including an optocoupler for converting the detection signal into an operating state signal, a signal delay module, a self-lock control module for controlling the power supply module, a signal control module for transmitting the operating state signal to the signal control module via the signal delay module and controlling the self-lock control module according to the operating state signal, comprising: 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, presents the operating state signal, two output terminals of the optocoupler of the signal conversion module are respectively connected to the operating state detection node and a ground point, the optocoupler is turned on when the detection signal is greater than a threshold value, and generates the operating state signal which is at a low potential at the operating state detection node and the ground point and represents a normal state, the photodetector is turned off when the detection signal is lower than the threshold value, disconnects the operating state detection node and the ground point and generates the operating state signal which is at a high potential and represents the abnormal state, the signal delay module is conducted when the operating state signal is in the abnormal state to activate the signal control module, causes the signal control module to activate the self-lock control module, and executes a self-lock control function by a mechanism for reducing the voltage of the voltage input terminal of the power supply module of the self-lock module, controls the power supply module to stop driving the light-emitting module, and enters a self-lock state. A lighting device having a fault detection and self-lock control function.

2. The lighting device according to claim 1, wherein the constant voltage source is provided by a power supply module.

3. 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. 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 the ground point. The first Zener diode is destroyed when the operating state detection node is at a high potential and generates the operating state signal indicating the abnormal state, charges the first capacitor with the operating state signal, drives the signal control module after the charging of the first capacitor is completed, causes the signal control module to drive the self-lock control module to control the power supply module, stops driving the light-emitting module, and enters the self-lock state. The lighting device with a fault detection and self-lock control function according to claim 1, characterized in that.

4. The first Zener diode is not destroyed when the operating state detection node is at a low potential and generates the operating state signal indicating the normal state, and maintains the off state of the signal delay module. The lighting device with a fault detection and self-lock control function according to claim 3, characterized in that.

5. The power supply module is a power supply module or a voltage conversion module. The lighting device with a fault detection and self-lock control function according to claim 1, characterized in that.

6. The light-emitting module is a light-emitting diode or a light-emitting diode array. The lighting device with a fault detection and self-lock control function according to claim 1, characterized in that.

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