LED assembly with protection circuit, light-emitting device, monitoring method and device

Abstract

The invention relates to the technical field of illumination, and particularly discloses an LED assembly with a protection circuit, a light-emitting device and a monitoring method and device.The LED assembly with the protection circuit comprises an LED lamp body; the voltage stabilizing assembly is connected with the LED lamp body in parallel and comprises a voltage stabilizing diode and a first resistor which are connected in series; the power semiconductor switch assembly is connected with the LED lamp body in parallel, and a control electrode of the power semiconductor switch assembly is connected with one end, connected with the voltage stabilizing diode, of the first resistor; the current inflow end is connected with the anode of the LED lamp body; the current output end is connected with the cathode of the LED lamp body; the LED assembly with the protection circuit is used as a single light-emitting unit and can apply voltage to a control electrode of the power semiconductor switch assembly based on the voltage stabilizing assembly when an LED lamp body is damaged, so that a bypass where the power semiconductor switch assembly is located is conducted, other light-emitting units can work normally, the light-emitting effect is guaranteed, and the service life of the LED lamp body is prolonged. And a worker can conveniently position and maintain the damaged LED lamp body.

Description

Technical Field

[0001] The present application relates to the field of lighting technology, and in particular to an LED component with a protection circuit, a light-emitting device, a monitoring method and a device. Background Art

[0002] In the existing LED lamp series circuit, multiple LED lamp beads are usually directly connected in sequence. Although this simple series design simplifies the circuit structure to a certain extent, it also has obvious defects. Once an LED lamp bead in the series circuit is damaged and disconnected due to aging, overheating or other reasons, the entire series circuit will be interrupted, causing all remaining LED lamp beads to fail to work normally. This problem not only affects the use effect of the LED lamp, but also increases maintenance costs and inconvenience.

[0003] There is currently no effective technical solution to the above problems. Summary of the invention

[0004] The purpose of the present application is to provide an LED component, a light-emitting device, a monitoring method and a device with a protection circuit, so that damage to a single LED lamp body does not affect the light emission of other LED lamp bodies, and it is convenient for staff to locate and maintain the damaged LED lamp body.

[0005] In a first aspect, the present application provides an LED assembly with a protection circuit, the LED assembly with a protection circuit comprising: LED lamp body; A voltage stabilizing component, connected in parallel with the LED lamp body, comprising a voltage stabilizing diode and a first resistor connected in series; A power semiconductor switch component, which is connected in parallel with the LED lamp body, and whose control electrode is connected to one end of the voltage-stabilizing diode connected to the first resistor; A current inflow end connected to the anode of the LED lamp body; The current output terminal is connected to the cathode of the LED lamp body.

[0006] The LED component with a protection circuit of the present application is used as a single light-emitting unit. When the LED lamp body is damaged, the voltage can be applied to the control electrode of the power semiconductor switch component based on the voltage stabilizing component, thereby turning on the bypass where the power semiconductor switch component is located, so that the remaining light-emitting units can work normally, ensuring the lighting effect, and making it easy for staff to locate and maintain the damaged LED lamp body, with the advantages of low maintenance cost and easy maintenance.

[0007] The LED assembly with a protection circuit, wherein the LED assembly with a protection circuit further comprises: A second resistor, a cathode of the voltage stabilizing component and a cathode of the power semiconductor switch component are connected, and the second resistor is connected to the cathode of the LED lamp body to be connected in parallel with the LED lamp body.

[0008] The second resistor is introduced into the leakage circuit where the power semiconductor switch component is located, which plays a role in diverting and limiting the leakage current. The introduction of the second resistor in the LED component with a protection circuit of the present application can reduce the current impact borne by the power semiconductor switch component, so that the power semiconductor switch component can avoid damage due to overcurrent, thereby improving the overall reliability and stability of the circuit.

[0009] In the LED component with protection circuit, the power semiconductor switch component is a thyristor or a MOS tube.

[0010] The LED assembly with a protection circuit, wherein the LED assembly with a protection circuit further comprises: A third resistor, the control electrode of the power semiconductor switch component is connected to one end of the voltage regulator diode connected to the first resistor through the third resistor.

[0011] In a second aspect, the present application also provides a light emitting device, comprising a plurality of LED components with a protection circuit; The LED assembly with protection circuit comprises: LED lamp body; A voltage stabilizing component, connected in parallel with the LED lamp body, comprising a voltage stabilizing diode and a first resistor connected in series; A power semiconductor switch component, which is connected in parallel with the LED lamp body, and whose control electrode is connected to one end of the voltage-stabilizing diode connected to the first resistor; A current inflow end connected to the anode of the LED lamp body; A current output terminal connected to the cathode of the LED lamp body; The multiple LED components with protection circuits are connected in series, the current inflow end of the first LED component with protection circuit is connected to the power supply voltage, and the current outflow end of the last LED component with protection circuit is grounded.

[0012] The light-emitting device of the present application is based on a device circuit of multiple light-emitting units formed by connecting multiple LED components with protection circuits in series. When the LED lamp body is damaged, each LED component with a protection circuit used as a single light-emitting unit can apply voltage to the control electrode of the power semiconductor switch component based on the voltage regulator component, thereby turning on the bypass where the power semiconductor switch component is located, so that the remaining light-emitting units can work normally, ensuring the lighting effect, and making it easy for staff to locate and maintain the damaged LED lamp body, with the advantages of low maintenance cost and easy maintenance.

[0013] The light emitting device, wherein the LED component with a protection circuit further comprises: A second resistor, a cathode of the voltage stabilizing component and a cathode of the power semiconductor switch component are connected, and the second resistor is connected to the cathode of the LED lamp body to be connected in parallel with the LED lamp body.

[0014] In a third aspect, the present application further provides a monitoring method for a light emitting device, which is applied to the above light emitting device, and the monitoring method for the light emitting device comprises the following steps: S1. Monitor and obtain the power supply voltage; S2. Compare the power supply voltage with a reference voltage to determine whether there is a damaged LED lamp body, wherein the reference voltage is set based on the number of LED components with protection circuits.

[0015] The monitoring method of the light emitting device, wherein the monitoring method of the light emitting device further comprises the steps of: S3. When there is a damaged LED lamp body, generate fault information.

[0016] The monitoring method of the light emitting device, wherein the monitoring method of the light emitting device further comprises the steps of: S4. When there are damaged LED lamp bodies, the number of damaged LED lamp bodies is calculated according to the supply voltage, the reference voltage and the resistance value of the second resistor.

[0017] The monitoring method of the light-emitting device of the present application can determine whether there is a damaged LED lamp body by monitoring the power supply voltage, which is convenient for the staff to conduct remote and coordinated monitoring of the light-emitting device, quickly determine whether there is any abnormality in the operation of the light-emitting device, and promptly discover and deal with the damaged LED lamp body.

[0018] In a fourth aspect, the present application further provides a monitoring device for a light emitting device, which is applied to the above light emitting device, and the monitoring device for the light emitting device comprises: An acquisition module, used for monitoring and acquiring the power supply voltage; The comparison module is used to compare the supply voltage with a reference voltage to determine whether there is a damaged LED lamp body, and the reference voltage is set based on the number of LED components with protection circuits.

[0019] From the above, it can be seen that the present application provides an LED component with a protection circuit, a light-emitting device, a monitoring method and a device, wherein the LED component with a protection circuit is used as a single light-emitting unit, and when the LED lamp body is damaged, a voltage can be applied to the control electrode of the power semiconductor switch component based on the voltage stabilizing component, thereby turning on the bypass where the power semiconductor switch component is located, so that the remaining light-emitting units can work normally, ensuring the lighting effect, and facilitating the staff to locate and maintain the damaged LED lamp body, which has the advantages of low maintenance cost and easy maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of the structure of an LED assembly with a protection circuit provided in an embodiment of the present application.

[0021] Figure 2 A schematic diagram of the structure of an LED component with a protection circuit provided in an embodiment of the present application after a second resistor is added.

[0022] Figure 3 A schematic diagram of the structure of an LED component with a protection circuit provided in an embodiment of the present application after a second resistor and a third resistor are added.

[0023] Figure 4 A schematic diagram of the structure of an LED component with a protection circuit provided in an embodiment of the present application after a second resistor and a first capacitor are added.

[0024] Figure 5 A schematic diagram of the equivalent structure of the LED assembly with a protection circuit provided in an embodiment of the present application after the LED lamp body is damaged.

[0025] Figure 6 A schematic diagram of the structure of a light-emitting device provided in an embodiment of the present application.

[0026] Figure 7 A flowchart of a method for monitoring a light-emitting device provided in some embodiments of the present application.

[0027] Figure 8 A flowchart of a monitoring method for a light-emitting device provided in some other embodiments of the present application.

[0028] Fig. 9 A schematic diagram of the structure of a monitoring device for a light-emitting device provided in some embodiments of the present application.

[0029] Fig.10 A schematic diagram of the structure of a monitoring device for a light-emitting device provided in some other embodiments of the present application.

[0030] Figure numerals: LED1, LED lamp body; ZD, Zener diode; R1, first resistor; Q1, power semiconductor switch component; I, current inflow end; O, current output end; R2, second resistor; R3, third resistor; C1, first capacitor; VCC, power supply voltage; 401, acquisition module; 402, comparison module; 403, fault module; 404, counting module. DETAILED DESCRIPTION

[0031] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0032] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0033] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0035] The disclosure below provides many different embodiments or examples to realize different structures of the present invention. In order to simplify the disclosure of the present invention, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention. In addition, the present invention can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplicity and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides various specific examples of processes and materials, but those of ordinary skill in the art can be aware of the application of other processes and / or the use of other materials.

[0036] First, please refer to Figure 1-Figure 5 Some embodiments of the present application provide an LED assembly with a protection circuit, and the LED assembly with a protection circuit includes: LED lamp body LED1; A voltage stabilizing component, connected in parallel with the LED lamp body LED1, comprising a voltage stabilizing diode ZD and a first resistor R1 connected in series; A power semiconductor switch component Q1, which is connected in parallel with the LED lamp body LED1, and whose control electrode is connected to one end of the voltage stabilizing diode ZD connected to the first resistor R1; The current flows into terminal I, which is connected to the anode of the LED lamp body LED1; The current output terminal O is connected to the cathode of the LED lamp body LED1.

[0037] Specifically, the LED component with a protection circuit in the embodiment of the present application is a light-emitting unit in a light-emitting device with multiple light-emitting units, and the multiple light-emitting units are generally connected in series. Among them, the LED lamp body LED1 in the LED component with a protection circuit as a light-emitting unit can be one or more LED (light-emitting diode) lamp beads connected in series, and in the embodiment of the present application, it is preferably one.

[0038] More specifically, under normal working conditions, current flows from the current inflow terminal I through the LED lamp body LED1 to the current output terminal O, thereby lighting up the LED lamp body LED1. At this time, the voltage stabilizing component and the power semiconductor switch component Q1 are in a non-working state and do not affect the normal light emission of the LED lamp body LED1. When the LED lamp body LED1 is damaged, the voltage across the damaged LED lamp body LED1 will increase. Since the voltage stabilizing component is connected in parallel with the LED lamp body LED1, the voltage across the voltage stabilizing component will also increase. When the voltage increases to the stabilizing value of the voltage stabilizing diode ZD, the voltage stabilizing diode ZD is broken down and turned on. The current flows through the voltage stabilizing diode ZD and the first resistor R1, and a voltage Vr1 is generated on the first resistor R1. The voltage Vr1 is applied to the control electrode of the power semiconductor switch component Q1. When the control electrode voltage of the power semiconductor switch component Q1 reaches the turn-on voltage, the power semiconductor switch component Q1 is turned on. After the power semiconductor switch component Q1 is turned on, a bypass is formed at both ends of the damaged LED lamp body LED1. The current can bypass the damaged LED lamp body LED1 and continue to flow to the subsequent light-emitting units, ensuring that the path of the entire series circuit is not interrupted, so that other light-emitting units can continue to work normally, thereby solving the technical problem of the entire circuit not being able to work normally due to damage to a single light-emitting unit in the LED lamp series circuit, and improving the reliability and stability of the LED lamp series circuit.

[0039] More specifically, in an implementation where multiple light-emitting units are used in combination, a damaged LED component with a protection circuit directly appears to be in a dark state, and the LED lamp bodies LED1 of other LED components emit light normally, making it easy for staff to locate the damaged LED lamp body LED1 and perform maintenance on the LED lamp body LED1, which has the advantages of low maintenance cost and easy maintenance.

[0040] It should be noted that the voltage stabilization value of the voltage stabilizing diode ZD in the voltage stabilizing component is designed to be higher than the normal working voltage value of the LED lamp body LED1.

[0041] The LED component with a protection circuit in the embodiment of the present application is used as a single light-emitting unit. When the LED lamp body LED1 is damaged, the voltage can be applied to the control electrode of the power semiconductor switch component Q1 based on the voltage stabilizing component, thereby turning on the bypass where the power semiconductor switch component Q1 is located, so that the remaining light-emitting units can work normally, ensuring the lighting effect, and making it convenient for the staff to locate and maintain the damaged LED lamp body LED1, which has the advantages of low maintenance cost and easy maintenance.

[0042] In some preferred embodiments, Figure 2 As shown, the LED assembly with protection circuit also includes: The second resistor R2, the cathode of the voltage stabilizing component and the cathode of the power semiconductor switch component Q1 are connected, and is connected to the cathode of the LED lamp body LED1 through the second resistor R2 to be connected in parallel with the LED lamp body LED1.

[0043] Specifically, after the LED lamp body LED1 is damaged, the voltage stabilizing component drives the bypass where the power semiconductor switch component Q1 is located to be turned on and used as a leakage circuit. The second resistor R2 is introduced into the leakage circuit where the power semiconductor switch component Q1 is located to divert and limit the leakage current. The LED component with a protection circuit in the embodiment of the present application introduces the second resistor R2 to reduce the current shock borne by the power semiconductor switch component Q1, so that the power semiconductor switch component Q1 can avoid damage due to overcurrent, thereby improving the overall reliability and stability of the circuit.

[0044] In addition, when an overvoltage condition occurs, the voltage stabilizing diode ZD in the voltage stabilizing component begins to conduct, and the power semiconductor switch component Q1 is immediately triggered to conduct, and the second resistor R2 connected between the cathode of the voltage stabilizing component, the cathode of the MOS tube and the cathode of the LED lamp body LED1 can limit the current flowing through the MOS tube, so that the current passing through the MOS tube will not be too large, thereby avoiding the MOS tube from being damaged due to overcurrent, and realizing short-circuit protection for the LED lamp body LED1, thereby improving the protection capability of the LED component with a protection circuit under abnormal voltage.

[0045] More specifically, the second resistor R2 can also be used as a monitoring benchmark for damage to the LED lamp body LED1. After the LED lamp body LED1 is damaged, the second resistor R2 will produce a voltage drop on the entire circuit. Therefore, when multiple light-emitting units are used, the LED component with a protection circuit in the embodiment of the present application can determine whether the LED lamp body LED1 is damaged based on whether the voltage is affected by the voltage drop generated by the second resistor R2.

[0046] In some preferred embodiments, the power semiconductor switch component Q1 is a thyristor or a MOS tube.

[0047] Specifically, the control electrode of the silicon controlled rectifier (SCR) is the gate, and the control electrode of the MOS tube is the gate.

[0048] More specifically, both thyristors and MOS tubes are mature semiconductor switching devices with fast switching speed and reliability. When used as power semiconductor switch component Q1, they can quickly conduct and shunt when abnormal conditions occur in the LED lamp body LED1, thereby protecting the LED lamp body LED1 from damage caused by overvoltage or overcurrent.

[0049] More specifically, in the embodiment of the present application, the power semiconductor switch component Q1 is preferably a thyristor.

[0050] In some preferred embodiments, Figure 3 As shown, the LED assembly with protection circuit also includes: The third resistor R3, the control electrode of the power semiconductor switch component Q1 is connected to one end of the first resistor R1 connected to the Zener diode ZD through the third resistor R3.

[0051] Specifically, the third resistor R3 is used to adjust the control electrode voltage of the power semiconductor switch component Q1 to achieve more precise control of the opening and closing of the power semiconductor switch component Q1.

[0052] More specifically, the LED assembly with a protection circuit in the embodiment of the present application can limit the current flowing into the control electrode by adding the third resistor R3, so as to prevent the control electrode from being damaged due to overcurrent.

[0053] In some preferred embodiments, Figure 4 As shown, the LED assembly with protection circuit also includes: The first capacitor C1 has one end connected to the control electrode of the power semiconductor switch component and the other end connected to the cathode of the power semiconductor switch component.

[0054] Specifically, in this embodiment, after the LED lamp body LED1 is damaged, the first capacitor C1 and the first resistor R1 form a parallel RC circuit, which can produce a filtering effect, reduce noise interference, and improve the anti-interference ability of the protection circuit, thereby further improving the reliability and stability of the circuit.

[0055] Second, please refer to Figure 6 , some embodiments of the present application also provide a light emitting device, including a plurality of LED components with a protection circuit; LED assemblies with protection circuits include: LED lamp body LED1; A voltage stabilizing component, connected in parallel with the LED lamp body LED1, comprising a voltage stabilizing diode ZD and a first resistor R1 connected in series; A power semiconductor switch component Q1, which is connected in parallel with the LED lamp body LED1, and whose control electrode is connected to one end of the voltage stabilizing diode ZD connected to the first resistor R1; The current flows into terminal I, which is connected to the anode of the LED lamp body LED1; The current output terminal O is connected to the cathode of the LED lamp body LED1; A plurality of LED components with protection circuits are connected in series, a current inflow terminal I of the first LED component with protection circuit is connected to a power supply voltage VCC, and a current outflow terminal of the last LED component with protection circuit is grounded.

[0056] Specifically, when the light-emitting device is operating normally, current flows in from the power supply voltage VCC, passes through the LED components with protection circuits connected in series in sequence, and finally flows to the ground.

[0057] More specifically, based on the foregoing content, it can be known that an LED component with a protection circuit is equivalent to a light-emitting unit. The light-emitting device of the embodiment of the present application includes a plurality of light-emitting units connected in series, each of which has independent protection capabilities. Damage to the LED lamp body LED1 in any LED component with a protection circuit will not affect the normal operation of the LED lamp bodies LED1 in other LED components with protection circuits.

[0058] The light-emitting device of the embodiment of the present application is based on a device circuit with multiple light-emitting units formed in series by connecting multiple LED components with protection circuits. When the LED lamp body LED1 is damaged, each LED component with a protection circuit used as a single light-emitting unit can apply voltage to the control electrode of the power semiconductor switch component Q1 based on the voltage regulator component, thereby turning on the bypass where the power semiconductor switch component Q1 is located, so that the remaining light-emitting units can work normally, ensuring the lighting effect, and making it easy for staff to locate and maintain the damaged LED lamp body LED1, which has the advantages of low maintenance cost and easy maintenance.

[0059] In some preferred embodiments, the LED assembly with a protection circuit further comprises: The second resistor R2, the cathode of the voltage stabilizing component and the cathode of the power semiconductor switch component Q1 are connected, and is connected to the cathode of the LED lamp body LED1 through the second resistor R2 to be connected in parallel with the LED lamp body LED1.

[0060] Specifically, based on the foregoing content, it can be known that the second resistor R2 can improve the reliability and life of each LED component with a protection circuit, and can also serve as a monitoring benchmark for damage to the LED lamp body LED1.

[0061] Third, please refer to Figure 7 and Figure 8 Some embodiments of the present application further provide a monitoring method for a light emitting device, which is applied to the light emitting device having the second resistor R2. The monitoring method for the light emitting device comprises the following steps: S1, monitor and obtain the power supply voltage VCC; S2. Compare the power supply voltage VCC with the reference voltage to determine whether there is a damaged LED lamp body LED1. The reference voltage is set based on the number of LED components with protection circuits.

[0062] Specifically, step S1 monitors and obtains the power supply voltage VCC to obtain the real-time power supply status of the light-emitting device, and step S2 compares the power supply voltage VCC with the reference voltage to evaluate the working status of the LED lamp body LED1; wherein the reference voltage is pre-set based on the number of LED components with protection circuits, and is used to reflect the voltage level of the light-emitting device in a normal working state (all LED lamp bodies LED1 are working normally). Based on the foregoing content, it can be known that the voltage stabilizing circuit and the power semiconductor switch component Q1 in each LED component with a protection circuit are in a cut-off state when the LED lamp body LED1 is working normally, and the power supply voltage VCC satisfies: VCC=n*V led (1) Where n is the number of LED components with protection circuits, V led is the conduction voltage drop of each LED lamp body LED1; if some LED lamp bodies LED1 in the light-emitting device are damaged, the supply voltage VCC satisfies: VCC = (nm) V led +m*I o r2 (2) Where, m is the number of damaged LED lamp bodies LED1, I o is the input current of the LED lamp body LED1, and r2 is the resistance value of the second resistor R2.

[0063] It can be seen that the supply voltage VCC will change based on the number of damaged LED lamp bodies LED1, wherein the reference voltage can be set to the value of the supply voltage VCC in formula (1). Therefore, the monitoring method of the light-emitting device in the embodiment of the present application can determine whether there is a damaged LED lamp body LED1 by monitoring the supply voltage VCC.

[0064] It should be noted that, in order to ensure that the damaged LED lamp body LED1 can affect the power supply voltage VCC, the resistance value of the second resistor R2 needs to meet the following requirements: o *r2>V led or I o *r2<V led The specific resistance value can be selected according to the actual monitoring accuracy required.

[0065] The monitoring method of the light-emitting device in the embodiment of the present application can determine whether there is a damaged LED lamp body LED1 by monitoring the power supply voltage VCC, which is convenient for the staff to conduct remote and coordinated monitoring of the light-emitting device, quickly determine whether there is any abnormality in the operation of the light-emitting device, and promptly discover and deal with the damaged LED lamp body LED1.

[0066] In some preferred embodiments, the monitoring method of the light emitting device further comprises the steps of: S3. When there is a damaged LED lamp body LED1, generate fault information.

[0067] Specifically, step S3 converts the judgment result into information that can be recorded, displayed or further processed; wherein, the fault information can be recorded in a memory for subsequent query and analysis, or the fault information can be displayed on a display screen to intuitively prompt maintenance personnel, or the fault information can be sent to a remote monitoring system to achieve remote fault monitoring and management, making it convenient for maintenance personnel to understand and handle faults in a timely manner, thereby improving the maintenance efficiency and intelligence level of the light-emitting device.

[0068] In some preferred embodiments, the monitoring method of the light emitting device further comprises the steps of: S4. When there are damaged LED lamp bodies LED1, the number of damaged LED lamp bodies LED1 is calculated according to the power supply voltage VCC, the reference voltage and the resistance value of the second resistor R2.

[0069] Specifically, based on the above formula (2), it can be known that the actual value of the power supply voltage VCC is directly related to the number of damaged LED lamp bodies LED1, and the relationship is linear. The reference voltage can be set to the value of the power supply voltage VCC in formula (1). Based on the actual difference between the reference voltage and the power supply voltage VCC, the resistance value of the second resistor R2, and the conduction current of the LED lamp body LED1, the number of actually damaged LED lamp bodies LED1 can be conveniently calculated. This processing method can help the staff quickly and accurately grasp the damage of the light-emitting device, so as to facilitate timely maintenance and replacement, and ensure the normal use of the light-emitting device.

[0070] More specifically, in other implementations, step S4 can be transformed into: based on the comparison between the supply voltage VCC and the reference voltage, the voltage difference is obtained, and then combined with a pre-established model or lookup table, the number of damaged LED lamp bodies LED1 is screened and obtained.

[0071] More specifically, in an implementation method including step S3, step S4 may be executed after step S3 or before step S3; in an implementation method not including step S3, step S4 is executed after step S2.

[0072] Fourth, please refer to Fig. 9 and Fig.10 Some embodiments of the present application further provide a monitoring device for a light emitting device, which is applied to the light emitting device having the second resistor R2, and the monitoring device for the light emitting device includes: An acquisition module 401 is used to monitor and acquire a power supply voltage VCC; The comparison module 402 is used to compare the power supply voltage VCC with the reference voltage to determine whether there is a damaged LED lamp body LED1. The reference voltage is set based on the number of LED components with protection circuits.

[0073] The monitoring device of the light-emitting device in the embodiment of the present application can determine whether there is a damaged LED lamp body LED1 by monitoring the power supply voltage VCC, which is convenient for the staff to conduct remote and coordinated monitoring of the light-emitting device, quickly determine whether there is any abnormality in the operation of the light-emitting device, and promptly discover and deal with the damaged LED lamp body LED1.

[0074] In some preferred embodiments, the monitoring device of the light emitting device further comprises: The fault module 403 is used to generate fault information when there is a damaged LED lamp body LED1.

[0075] In some preferred embodiments, the monitoring device of the light emitting device further comprises: The counting module 404 is used for calculating and obtaining the number of the damaged LED lamp bodies LED1 according to the power supply voltage VCC, the reference voltage and the resistance value of the second resistor R2 when there are damaged LED lamp bodies LED1.

[0076] In some preferred embodiments, the monitoring device of the light-emitting device of the embodiment of the present application is used to execute the monitoring method of the light-emitting device provided in the third aspect above.

[0077] In the description of this specification, the description with reference to the terms "one embodiment", "certain embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0078] The above are only some embodiments of the present invention. For those skilled in the art, several modifications and improvements can be made without departing from the creative concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. An LED assembly with a protection circuit, characterized in that: The LED assembly with a protection circuit comprises: LED lamp body; A voltage stabilizing component, connected in parallel with the LED lamp body, comprising a voltage stabilizing diode and a first resistor connected in series; A power semiconductor switch component, which is connected in parallel with the LED lamp body, and whose control electrode is connected to one end of the voltage-stabilizing diode connected to the first resistor; A current inflow end connected to the anode of the LED lamp body; The current output terminal is connected to the cathode of the LED lamp body.

2. The LED assembly with a protection circuit according to claim 1, characterized in that: The LED assembly with protection circuit also includes: A second resistor, a cathode of the voltage stabilizing component and a cathode of the power semiconductor switch component are connected, and the second resistor is connected to the cathode of the LED lamp body to be connected in parallel with the LED lamp body.

3. The LED assembly with a protection circuit according to claim 1, characterized in that: The power semiconductor switch component is a thyristor or a MOS tube.

4. The LED assembly with a protection circuit according to claim 1, characterized in that: The LED assembly with protection circuit also includes: A third resistor, the control electrode of the power semiconductor switch component is connected to one end of the voltage regulator diode connected to the first resistor through the third resistor.

5. A light emitting device, characterized in that: including a plurality of LED assemblies having a protection circuit; The LED assembly with a protection circuit comprises: LED lamp body; A voltage stabilizing component, connected in parallel with the LED lamp body, comprising a voltage stabilizing diode and a first resistor connected in series; A power semiconductor switch component, which is connected in parallel with the LED lamp body, and whose control electrode is connected to one end of the voltage-stabilizing diode connected to the first resistor; A current inflow end connected to the anode of the LED lamp body; A current output terminal connected to the cathode of the LED lamp body; The multiple LED components with protection circuits are connected in series, the current inflow end of the first LED component with protection circuit is connected to the power supply voltage, and the current outflow end of the last LED component with protection circuit is grounded.

6. The light emitting device according to claim 5, characterized in that: The LED assembly with protection circuit also includes: A second resistor, a cathode of the voltage stabilizing component and a cathode of the power semiconductor switch component are connected, and the second resistor is connected to the cathode of the LED lamp body to be connected in parallel with the LED lamp body.

7. A method for monitoring a light emitting device, applied to the light emitting device as claimed in claim 6, characterized in that: The monitoring method of the light emitting device comprises the following steps: S1. Monitor and obtain the power supply voltage; S2. Compare the power supply voltage with a reference voltage to determine whether there is a damaged LED lamp body, wherein the reference voltage is set based on the number of LED components with protection circuits.

8. The method for monitoring a light emitting device according to claim 7, characterized in that: The monitoring method of the light emitting device further comprises the steps of: S3. When there is a damaged LED lamp body, generate fault information.

9. The method for monitoring a light emitting device according to claim 7, characterized in that: The monitoring method of the light emitting device further comprises the steps of: S4. When there are damaged LED lamp bodies, the number of damaged LED lamp bodies is calculated according to the supply voltage, the reference voltage and the resistance value of the second resistor.

10. A monitoring device for a light emitting device, characterized in that: In the light-emitting device as claimed in claim 6, the monitoring device of the light-emitting device comprises: An acquisition module, used for monitoring and acquiring the power supply voltage; The comparison module is used to compare the supply voltage with a reference voltage to determine whether there is a damaged LED lamp body, and the reference voltage is set based on the number of LED components with protection circuits.

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