Lighting device capable of monitoring lighting quality

Abstract

The present disclosure relates to a lighting device capable of monitoring lighting quality, the lighting device comprising: a lighting diode connected to an external power source through a driver to receive power from the external power source and emit light; the sampling and control unit is connected to the lighting diode in parallel so as to sample the voltage of the lighting diode or a specific device in the circuit when the lighting diode receives the electric energy and emits light; the indicating diode is located on a parallel branch where the sampling and control unit is located; wherein the sampling and control unit compares the sampled voltage with a preset value, and when the sampled voltage is greater than the preset value or is greatly changed from the preset value, the sampling and control unit sends out a control signal; the control signal controls the light-emitting state of the indicating diode to change or controls the light-emitting state of the lighting diode to change without the indicating diode. According to the lighting device, the lighting quality condition of the lighting device can be effectively indicated to a user, and the user is helped to take measures in time.

Description

Technical Field

[0001] The present disclosure relates to the field of lighting, and in particular to a lighting device capable of monitoring lighting quality. Background Art

[0002] Typically, the rated lifespan of lighting fixtures (or LED lamps) ranges from 10,000 to 50,000 hours. Nearing the end of their lifespan, lighting fixtures present safety risks. First, the lumen output (the total amount of light emitted by the light source) decreases significantly. Second, the lighting fixture may emit smoke or catch fire.

[0003] In order to address the safety risks that exist when a lighting device is about to end its life, the present application proposes a lighting device that can monitor the lighting quality. The lighting device controls the circuit state of an indicator to change or directly controls the light-emitting state of the lighting diode to change when the voltage of the lighting diode increases by determining that the voltage exceeds a preset value, allowing the user to perform operations such as inspection, maintenance or replacement of the lighting device with increased voltage, thereby avoiding potential safety risks of the lighting device, avoiding eye fatigue of the user, and increasing sales of the lighting device.

[0004] Through the above design, the lighting device of the present application can effectively indicate the lighting quality of the lighting device to the user, helping the user to take timely measures. Utility Model Content

[0005] In view of this, the present disclosure aims to propose an improved lighting device, which is capable of sensing, through a microcontroller unit or a sensing element, when the voltage of a lighting diode exceeds a preset value, and in this case, controlling the circuit state of the indicator diode to change or directly controlling the light-emitting state of the lighting diode to change without the need for an indicator diode, so as to effectively indicate the lighting quality of the lighting device to the user, thereby avoiding potential safety risks of the lighting device, avoiding eye fatigue of the user, and increasing sales of the lighting device.

[0006] According to one aspect of the present disclosure, a lighting device capable of monitoring lighting quality is provided, wherein the lighting device includes a lighting diode connected to an external power supply via a driver to receive electrical energy from the external power supply and emit light; a sampling and control unit connected to the lighting diode, the sampling and control unit comprising: a sampling end for sampling the voltage of a specific device in a circuit when the lighting diode receives electrical energy and emits light, an output end for making a judgment based on the sampled voltage and issuing a control signal; an indicator diode located on a branch where the sampling and control unit is located to receive a control signal; wherein, when a comparison result between the sampled voltage and a preset value changes, the output end of the sampling and control unit issues a control signal to the indicator diode, and the control signal controls the circuit state of the indicator diode to change.

[0007] In this way, the present disclosure can monitor the voltage of a lighting diode, which increases with the duration of lighting. When the voltage exceeds a preset value, the indicator diode acts as an indicator to indicate that the lighting diode should be inspected, maintained, or replaced. Alternatively, if the indicator diode is not required, the lighting state of the lighting diode is directly controlled by the driver to prompt the lighting diode to undergo inspection, maintenance, or replacement. Thus, the present disclosure can, in an intuitive and simple manner, avoid potential safety risks of lighting devices, prevent user eyestrain, and increase sales of lighting devices.

[0008] According to an exemplary embodiment of the present disclosure, the circuit state of the indicator diode can be changed from the on state to the off state, or from the off state to the on state.

[0009] In this way, through the turning off or on of the indicating diode serving as an indicator, the user is intuitively and obviously reminded that the lighting quality of the lighting diode is deteriorating, or that the rated lighting duration of the lighting diode is about to be reached.

[0010] According to an exemplary embodiment of the present disclosure, the sampling and control unit is a sensing element, which senses the voltage of the lighting diode in real time, and when the comparison result between the sampled voltage and the preset value changes, the sampling and control unit controls the circuit state of the indicator diode to change through a control signal.

[0011] In this way, the present disclosure can use a sensing element to sense voltage in real time. The sensing element can determine the magnitude relationship between the voltage and a preset value in real time and control the circuit of the indicator diode to be turned on or off.

[0012] According to an exemplary embodiment of the present disclosure, the sampling and control unit is a microcontroller unit, which samples the voltage of the lighting diode at a predetermined sampling frequency, and when the comparison result of the sampled voltage and the preset value changes, the sampling and control unit controls the circuit state of the indicator diode to change.

[0013] In this way, the present disclosure can sample the voltage of the lighting diode at a predetermined frequency, and the microcontroller unit determines the magnitude relationship between the voltage and a preset value at the predetermined frequency, thereby indicating whether the circuit of the diode is turned on or off.

[0014] According to an exemplary embodiment of the present disclosure, the lighting device further includes a voltage regulating device connected between the lighting diode and ground, wherein when the lighting duration of the lighting diode reaches a rated life duration, the voltage of the voltage regulating device changes.

[0015] According to an exemplary embodiment of the present disclosure, a voltage regulating device includes a first diode connected between a lighting diode and ground, and a second diode connected in parallel with the first diode, wherein the first diode has a first forward voltage drop, and the second diode has a second forward voltage drop that is smaller than the first forward voltage drop; when the conduction time of the second diode reaches the rated lighting time of the lighting diode and is disconnected, the voltage across the first diode increases.

[0016] In this manner, the present disclosure connects two diodes between a lighting diode and ground, and the two diodes have different forward voltage drops. When the second diode's conduction duration reaches the rated lighting duration of the lighting diode and automatically disconnects, the voltage across the first diode increases. After the voltage across the first diode increases, the sampling and control unit can capture a more significant voltage, thereby more accurately determining that the lighting quality of the lighting diode has deteriorated and indicating to the user that the rated lighting duration has been reached.

[0017] According to an exemplary embodiment of the present disclosure, the voltage regulating device is a resistor.

[0018] In this way, after the lighting diode has been illuminated for a long time, the resistor of the present invention begins to heat up and causes the resistance value to increase, thereby increasing the voltage across the resistor. The sampling and control unit can collect a more significant voltage, thereby more accurately judging the deterioration of the lighting quality of the lighting diode and indicating to the user that the lighting diode has reached the rated lighting time.

[0019] According to an exemplary embodiment of the present disclosure, the first diode is a silicon tube and the second diode is a germanium tube.

[0020] According to an exemplary embodiment of the present disclosure, the lighting device further includes a bridge rectifier connected between the external power source and the lighting diode, and the bridge rectifier rectifies the AC power of the external power source into DC power.

[0021] According to an exemplary embodiment of the present disclosure, the lighting device further includes a lighting diode driver connected between a positive electrode of the external power supply and a positive electrode of the lighting diode, the lighting diode driver converting electric energy from the external power supply so that a current flowing through the lighting diode is constant.

[0022] In this way, the lighting diode driver can effectively control the operating current of the lighting diode and provide a stable current output, thereby preventing the lighting fixture from being unstable or damaged due to voltage fluctuations or other external factors.

[0023] According to an exemplary embodiment of the present disclosure, when the sampling and control unit is a microcontroller unit, the lighting device further includes a microcontroller unit driver connected between the positive pole of the external power supply and the microcontroller unit, and the microcontroller unit driver converts the voltage from the external power supply to drive the microcontroller unit.

[0024] In this way, the microcontroller unit driver can convert the voltage from the external power supply into a voltage suitable for the microcontroller unit, meeting the requirements of the microcontroller unit.

[0025] According to an exemplary embodiment of the present disclosure, the sampling and control unit includes a voltage comparator connected to the sampling terminal and the output terminal, wherein the voltage comparator compares the sampled voltage with a preset value and outputs the comparison result from the output terminal.

[0026] According to an exemplary embodiment of the present disclosure, the lighting diode includes a red light emitting diode emitting red light, a green light emitting diode emitting green light, or a blue light emitting diode emitting blue light.

[0027] In this way, the lighting diode can emit light of various colors such as red, green, and blue, and different colors of light can be mixed as needed to achieve colorful lighting effects.

[0028] According to an exemplary embodiment of the present disclosure, the preset value is a value input from the outside or an initial value sampled by the sampling and control unit.

[0029] According to an exemplary embodiment of the present disclosure, the lighting device further includes a current limiting resistor connected in series with the sensing element to limit the current flowing through the sensing element to protect the sensing element.

[0030] In this way, the current-limiting resistor limits the current flowing through the sensing element to prevent the sensing element from being overloaded and damaged. The resistance of the current-limiting resistor can be selected based on the rated current and operating voltage of the sensing element to ensure that the sensing element is not overloaded under normal operating conditions.

[0031] According to an exemplary embodiment of the present disclosure, the lighting device further includes a voltage-dividing resistor connected in parallel with the sensing element to provide a suitable sampling voltage for the sampling and control unit.

[0032] In this way, the voltage divider resistor is usually designed as a fixed-value resistor. Its purpose is to convert the voltage of the lighting diode into a voltage within the safe range acceptable to the sensing element. This effectively protects the sensing element from damage due to excessive voltage and prevents malfunction of the sampling and control unit.

[0033] According to an exemplary embodiment of the present disclosure, the sensing element is a TL431 element or a similar AZ431 element.

[0034] According to another aspect of the present disclosure, a lighting device capable of monitoring lighting quality is provided, the lighting device including a lighting diode connected to an external power supply via a driver to receive electrical energy from the external power supply and emit light; a sampling and control unit connected to the lighting diode, the sampling and control unit including: a sampling end for sampling the voltage of a specific device in a circuit when the lighting diode receives electrical energy and emits light, an output end for making a judgment based on the sampled voltage and issuing a control signal; wherein, when a comparison result between the sampled voltage and a preset value changes, the output end of the sampling and control unit issues a control signal to the driver, and the driver changes the lighting state of the lighting diode according to the control signal.

[0035] In this way, the present disclosure can intuitively understand the degradation of the lighting quality of the lighting diode at low cost by directly controlling the lighting diode to flash or dim without an indicator through the driver.

[0036] According to an exemplary embodiment of the present disclosure, the sampling and control unit is a sensing element, which senses the voltage of the lighting diode in real time, and when the comparison result between the sampled voltage and the preset value changes, the sampling and control unit controls the light-emitting state of the lighting diode to change through a control signal.

[0037] According to an exemplary embodiment of the present disclosure, the sampling and control unit is a microcontroller unit, which samples the voltage of the lighting diode at a predetermined sampling frequency, and when the comparison result of the sampled voltage and the preset value changes, the sampling and control unit controls the light-emitting state of the lighting diode to change through a control signal.

[0038] According to an exemplary embodiment of the present disclosure, the lighting device further includes a voltage regulating device connected between the lighting diode and ground, wherein when the lighting duration of the lighting diode reaches a rated life duration, the voltage of the voltage regulating device changes.

[0039] According to an exemplary embodiment of the present disclosure, the sampling and control unit includes a voltage comparator, wherein the voltage comparator is connected to the sampling terminal and the output terminal, wherein the voltage comparator compares the sampled voltage with a preset value and outputs the comparison result from the output terminal.

[0040] According to an exemplary embodiment of the present disclosure, the light emitting state of the lighting diode is changed to flicker or the brightness is dimmed.

[0041] In an embodiment of the present disclosure, a technical solution is provided in which a sampling and control unit controls the circuit state of an indicator or directly controls the luminous state of a lighting diode by comparing the sampled lighting diode voltage with a preset value, so as to at least solve the technical problems in the prior art of deteriorated lighting quality, potential safety risks, and poor user experience, thereby achieving the technical effects of avoiding potential safety risks of lighting devices, avoiding eye fatigue of users, and increasing sales of lighting devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an improper limitation on this application. In the drawings:

[0043] Figure 1 is a schematic diagram showing the use of a sensing element to control an indicator diode.

[0044] Figure 2 is a schematic diagram showing the control of an indicator diode using a microcontroller unit.

[0045] Figure 3 is a schematic diagram showing the use of two diodes as voltage regulating means.

[0046] Figure 4 is a schematic diagram showing the use of a resistor as a voltage regulating device.

[0047] Figure 5 2 is a schematic diagram showing that a microcontroller unit sends a control signal to a lighting diode driver to directly control a lighting diode via the lighting diode driver without an indicator diode.

[0048] Figure 6 Schematic diagram showing the structure of a lighting diode and an indicator diode in a light bulb.

[0049] Reference numerals

[0050] 1: Lighting device;

[0051] 10: External power supply;

[0052] 20: lighting diode;

[0053] 30: sampling and control unit;

[0054] 40: indicator diode;

[0055] D1: first diode;

[0056] D2: second diode;

[0057] 50: Bridge rectifier;

[0058] 60: lighting diode driver;

[0059] 70: microcontroller unit driver;

[0060] R3: current limiting resistor;

[0061] R1, R2: voltage divider resistors;

[0062] 80: voltage regulator;

[0063] 90: Bubble shell. DETAILED DESCRIPTION

[0064] Hereinafter, embodiments of the present application will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily implement the embodiments of the present application. However, the present application can be implemented in many different forms and should not be construed as being limited to the embodiments described herein. In the accompanying drawings, for the sake of clarity, parts that are not related to the description of the present application will be omitted. Similar reference numerals refer to similar elements throughout the description. In addition, when providing a description with reference to the accompanying drawings, although the elements are represented by the same numerals, the reference numerals relating to the elements may be changed, and the reference numerals are described only for the convenience of description, and should not be understood as limiting the concepts, features, functions or effects of the elements to the reference numerals.

[0065] In actual applications, when the cumulative lighting time of a lighting device (or LED lamp) exceeds the rated lighting life, not only will the lumen decrease, but there may also be safety hazards such as smoke or fire, and insufficient brightness may cause eye fatigue in the user.

[0066] Therefore, it is crucial to determine whether the lighting quality of a lighting device has deteriorated and whether there are potential safety issues.

[0067] To this end, the present disclosure provides a lighting device capable of monitoring lighting quality. It controls an indicator diode to indicate by determining whether the voltage of a lighting diode is greater than a preset value, or directly controls the lighting diode to flash or dim through a driver without the need for an indicator diode, thereby facilitating users to inspect, repair or replace the lighting device according to the indication.

[0068] Figure 1 is a schematic diagram showing the use of a sensing element to control an indicator diode. Figure 2 Schematic diagram for controlling an indicator diode using a microcontroller unit.

[0069] like Figure 1 or Figure 2 As shown, the external power source 10 is electrically connected to the lighting device 1 via a wire to provide power to the lighting device 1. The power source 10 may be a renewable energy source, a mobile power source, etc., but the present disclosure is not limited thereto.

[0070] The lighting device 1 includes a lighting diode 20, a sampling and control unit 30, an indicator diode 40, a bridge rectifier 50, and a diode driver 60. In addition, the lighting device 1 may further include a microcontroller unit driver 70 and the like.

[0071] The bridge rectifier 50 is connected between the external power source 10 and the lighting diode 20, and rectifies the AC power of the external power source 10 into DC power. The bridge rectifier 50 is composed of four diodes and can rectify the AC power into DC power.

[0072] The lighting diode driver 60 is connected between the external power supply 10 and the lighting diode 20, and can be used as a constant current source, for example, to keep the current flowing through the lighting diode 20 constant, thereby avoiding unstable operation or damage of the lamp due to voltage fluctuations or other external factors.

[0073] The microcontroller unit driver 70 is connected between the external power supply 10 and the sampling and control unit 30 as a microcontroller unit, and converts the voltage from the external power supply 10 to drive the microcontroller unit 30 to meet the needs of the microcontroller unit.

[0074] The lighting diode 20 has a rated lighting life of, for example, 10,000 hours to 50,000 hours, and is connected to the external power source 10 through a driver to receive power from the external power source 10 and emit light.

[0075] The lighting diode 20 can convert electrical energy into light energy. The lighting diode 20 has advantages such as high efficiency, long life, and low energy consumption, and is therefore widely used in the field of lighting. Common lighting diodes include LEDs (light emitting diodes).

[0076] The lighting diode 20 can emit light of various colors such as red, green, and blue, and can mix light of different colors as needed to achieve colorful lighting effects.

[0077] Generally, after the accumulated lighting time of the lighting diode 20 reaches the rated lighting time, the lighting diode 20 can still continue to emit light, but the light emitted will be weakened, the lighting quality will deteriorate, and there may be smoke or fire, which may endanger safety.

[0078] In addition, when the accumulated lighting time of the lighting diode 20 is long, the lighting quality of the lighting diode 20 may deteriorate, such as color shift, brightness reduction, and voltage increase.

[0079] To prevent further impacts on users from deteriorating lighting quality and to avoid potential safety issues, the present disclosure utilizes the characteristic that the voltage of the lighting diode 20 increases over time, enabling the sampling and control unit to continuously or at a predetermined sampling frequency sample the voltage across the lighting diode 20. When the sampled voltage reaches a preset value received from an external source, the sampling and control unit can issue a user alert using multiple alert methods. It should be noted that the sampling and control unit can not only sample the voltage across the lighting diode 20, but also the total voltage of the lighting diode 20 and any devices connected in series with the lighting diode 20 in the circuit. As described below, such devices can be resistors, diodes, and the like.

[0080] It should be noted that the preset value may be a value received from the outside, or may be a sampling value obtained by the sampling and control unit 30 when sampling the voltage for the first time, ie, an initial sampling value.

[0081] exist Figure 1 In the embodiment, the lighting diode 20 is connected to the external power supply 10 through a driver to receive electrical energy from the external power supply and emit light; the sampling and control unit 30 is connected in parallel to the lighting diode 20, and the sampling and control unit includes: a sampling end for sampling the voltage of the lighting diode or a specific device in the circuit when the lighting diode receives electrical energy and emits light, a comparator for comparing the sampled voltage with a preset value, and an output end for sending a control signal; the indicator diode 40 is located on the parallel branch where the sampling and control unit 30 is located to receive the control signal; wherein, when the sampled voltage is greater than the preset value, the output end of the sampling and control unit 30 sends a control signal to the indicator diode 40 or the driver of the lighting diode 20, and the control signal controls the circuit state of the indicator diode 40 to change or the lighting diode driver controls the lighting diode 20 to flash or dim.

[0082] The driver may be the lighting diode driver 60 , or another diode driver different from the lighting diode driver 60 .

[0083] exist Figure 1 In the example, sampling and control unit 30 is a sensing element that senses the voltage of the lighting diode in real time. In practical applications, the sensing element is an integrated circuit, specifically a TL431 or similar component. This sensing element integrates an amplifier and a transistor. The amplifier receives the voltage of the lighting diode at point A and compares it with a reference voltage. When the voltage of the lighting diode 20 exceeds the reference voltage, the transistor conducts, thereby changing the circuit state of the indicator diode 40 connected in series with the sensing element, causing the indicator diode 40 to function as an indicator.

[0084] Since the sensing element is an existing integrated element, this disclosure does not provide a detailed description thereof to avoid confusing the main purpose of this disclosure.

[0085] Furthermore, the circuit state of the indicator diode 40 is not limited to being changed from an off state to an on state, but may also be changed from an on state to an off state.

[0086] For example, in the initial state, the indicator diode 40 is in the off state and does not emit light. The sampling and control unit 30 compares the sampled voltage of the lighting diode 20 with a preset value, and when the sampled voltage is greater than the preset value, the sampling and control unit 30 sends a control signal to the indicator diode 40. The control signal controls the indicator diode 40 to turn on to emit light, so that the current life status of the lighting diode 20 is indicated to the user by the conduction of the indicator diode 40.

[0087] For example, in the initial state, the indicator diode 40 is in the on state and emits light. The sampling and control unit 30 compares the sampled voltage of the lighting diode 20 with a preset value. When the sampled voltage is greater than the preset value, the sampling and control unit 30 sends a control signal to the indicator diode 40. The control signal controls the brightness change of the indicator diode 40, so that the current life status of the lighting diode 20 is indicated to the user through the brightness change of the indicator diode 40.

[0088] To further enhance protection for the sensing element, lighting device 1 also includes a current-limiting resistor R3, connected in series with the sensing element to limit the current flowing through the sensing element and protect it. The current-limiting resistor limits the current flowing through the sensing element to prevent damage from overload. The resistance value of the current-limiting resistor can be selected based on the rated current and operating voltage of the sensing element to ensure that the sensing element does not overload under normal operating conditions.

[0089] In addition, the lighting device 1 includes voltage-dividing resistors R1 and R2, which are connected in parallel with the sensing element. The voltage-dividing resistor is typically designed as a fixed-value resistor, whose purpose is to convert the voltage of the lighting diode into a suitable voltage acceptable to the sensing element. This effectively protects the sensing element from damage caused by excessive voltage and prevents malfunction. Specifically, resistor R1 is connected to point A, resistor R2 is connected between resistor R1 and ground, and sensing element 30 is connected in parallel with resistor R2. Point A is selected by the user according to the specific situation.

[0090] like Figure 2 As shown, as another implementation, the sampling and control unit 30 can be a microcontroller unit MCU, which samples the voltage of the lighting diode 20 at a predetermined sampling frequency, and when the sampled voltage is greater than a preset value, the processor of the microcontroller unit controls the circuit state of the indicator diode 40 to change by sending a control signal to the indicator diode 40.

[0091] The microcontroller unit (MCU) consists of a processor, memory, and an oscillator. After receiving power, the oscillator generates a stable clock signal. The processor performs calculations, logical analysis, and other operations according to program instructions. The memory stores program code, data, and intermediate results. The processor, memory, and oscillator in the MCU work together to achieve control functions.

[0092] exist Figure 1 and Figure 2 In the embodiment, the lighting device 1 further comprises a voltage regulating device 80 connected between the lighting diode 20 and the ground. When the lighting duration of the lighting diode reaches the rated life duration, the voltage of the voltage regulating device 80 changes.

[0093] The voltage regulating device 80 can be implemented in a variety of ways. In one example, Figure 3 As shown, the voltage regulating device 80 includes a first diode D1 connected between the lighting diode and the ground and a second diode D2 connected in parallel with the first diode. The first diode D1 is a silicon tube made of silicon material, and the second diode D2 is a germanium tube made of germanium material.

[0094] The first diode D1 has a first forward voltage drop, for example, 0.7V, and the second diode D2 has a second forward voltage drop, for example, 0.3V, which is smaller than the first forward voltage drop. When both the first diode D1 and the second diode D2 are conducting, the voltage across the first diode D1 is 0.3V. When the second diode D2 is turned off after the conduction duration reaches the rated lighting duration of the lighting diode 20 (for example, 20,000 hours), the voltage across the first diode D1 becomes 0.7V. As a result, the voltage across the first diode D1 increases, and the sampling and control unit (including the sensing element and the microcontroller unit) can sample or sense the significant voltage increase, resulting in more accurate voltage measurements and more precise monitoring of lighting quality degradation of the lighting diode 20.

[0095] As another example, Figure 4 As shown, voltage regulator 80 is resistor R4. When lighting diode 20 is operating normally, all current flows through resistor R4. Resistor R4 begins to heat up and its temperature rises. As the lighting time increases, the resistance of resistor R4 increases. Since the current is constant, according to Ohm's law, V = I × R, the voltage across resistor R4 also gradually increases.

[0096] Similarly, the sampling and control unit 30 (including the sensing element and the microcontroller unit) can sample or sense the significant voltage increase, so that the measured voltage value is more accurate and the monitoring of the degradation of the lighting quality of the lighting diode 20 is more accurate.

[0097] As another implementation, the present disclosure can enable the sampling and control unit 30 to directly control the lighting state of the lighting diode 20 by sending a control signal to the diode driver 60, without requiring the indicator diode 40 as an indicator, thereby notifying the user of deteriorated lighting quality. It should be noted that the sampling and control unit 30 can also be a microcontroller unit or a sensing element.

[0098] like Figure 5 As shown, in the case where the indicator diode 40 is not provided in the lighting device 1, the sampling and control unit 30 is a microcontroller unit. The processor of the microcontroller unit samples the voltage at the selected point A of the lighting diode 20 and compares the sampled voltage with a preset value. When the sampled voltage exceeds the preset value, the processor of the microcontroller unit is communicatively connected to the lighting diode driver 60 to send a control signal to the lighting diode driver to cause the lighting diode 20 to flash or dim. The user can promptly inspect, maintain, or replace the lighting diode 20 based on the change in the lighting state of the lighting diode 20, such as the flashing or dimming of the lighting diode 20.

[0099] At this time, the lighting device 1 may further include a voltage regulating device 80 connected between the lighting diode and ground, wherein the voltage of the voltage regulating device changes when the lighting duration of the lighting diode reaches the rated life duration. The specific function of the voltage regulating device 80 is as described above.

[0100] In addition, if Figure 6 As shown, the lighting device 1 can be an LED bulb. The lighting diode 1 is located inside the bulb 90, and the indicator diode 40 is located near the bulb 90. Multiple diodes are placed on the bulb's circuit board, one of which is configured as the indicator diode 40, and the remaining diodes are lighting diodes 20. The portion of the bulb 90 near the indicator diode 40 is transparent, allowing the status of the indicator diode 40 to be observed. For example, a worker can visually see from the outside of the bulb whether the indicator diode 40 is lit.

[0101] The present disclosure can remind users of the safety risks and lighting quality degradation when the lamp is about to end its life without the help of additional devices, only through the structure of the lamp itself, to avoid causing eye fatigue to the user.

[0102] In an embodiment of the present disclosure, a technical solution is provided in which a sampling and control unit controls the circuit state of an indicator by comparing the sampled lighting diode voltage with a preset value, or a lighting diode driver directly controls the light-emitting state of the lighting diode, so as to at least solve the technical problems in the prior art of deteriorated lighting quality, potential safety risks, and poor user experience, and achieve the technical effect of avoiding potential safety risks of lighting devices and avoiding eye fatigue of users.

[0103] In the above embodiments of the present disclosure, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0104] In the several embodiments provided in the present disclosure, it should be understood that the disclosed technical content can be implemented in other ways.

[0105] The above is only a preferred embodiment of the present disclosure. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present disclosure. These improvements and modifications should also be regarded as within the scope of protection of the present disclosure.

Claims

1. A lighting device capable of monitoring lighting quality, characterized in that: The lighting device comprises: a lighting diode (20) connected to an external power source (10) via a driver to receive power from the external power source and emit light; A sampling and control unit (30) is connected to the lighting diode, the sampling and control unit comprising: a sampling terminal for sampling the voltage of a specific device in the circuit when the lighting diode receives electrical energy and emits light, and an output terminal for making a judgment based on the sampled voltage and issuing a control signal; an indicating diode (40), located on the branch where the sampling and control unit is located, to receive the control signal; When the comparison result between the sampled voltage and the preset value changes, the output end of the sampling and control unit sends the control signal to the indicator diode, and the control signal controls the circuit state of the indicator diode to change.

2. The lighting device according to claim 1, characterized in that The circuit state of the indicator diode can be changed from an on state to an off state, or from an off state to an on state.

3. The lighting device according to claim 1, wherein The sampling and control unit is a sensing element that senses the voltage of the lighting diode in real time. When the comparison result between the sampled voltage and the preset value changes, the sampling and control unit controls the circuit state of the indicator diode to change through the control signal.

4. The lighting device according to claim 1, wherein The sampling and control unit is a microcontroller unit, which samples the voltage of the lighting diode at a predetermined sampling frequency, and when the comparison result between the sampled voltage and the preset value changes, the sampling and control unit controls the circuit state of the indicator diode to change.

5. The lighting device according to claim 3 or 4, characterized in that: The lighting device further comprises a voltage regulating device (80) connected between the lighting diode and ground, wherein when the lighting duration of the lighting diode reaches the rated life duration, the voltage of the voltage regulating device changes.

6. The lighting device according to claim 5, characterized in that The voltage regulating device includes a first diode (D1) connected between the lighting diode and the ground, and a second diode (D2) connected in parallel with the first diode, wherein the first diode has a first forward voltage drop, and the second diode has a second forward voltage drop smaller than the first forward voltage drop; when the conduction time of the second diode reaches the rated lighting time of the lighting diode and is disconnected, the voltage across the first diode increases.

7. The lighting device according to claim 5, characterized in that The voltage regulating device is a resistor (R4).

8. The lighting device according to claim 6, characterized in that The first diode is a silicon diode and the second diode is a germanium diode.

9. The lighting device according to claim 1, wherein: The lighting device further comprises a bridge rectifier (50) connected between the external power source and the lighting diode, and the bridge rectifier rectifies the alternating current of the external power source into direct current.

10. The lighting device according to claim 1, wherein The lighting device further comprises a lighting diode driver (60) connected between the positive electrode of the external power source and the positive electrode of the lighting diode, wherein the lighting diode driver converts the electric energy from the external power source so that the current flowing through the lighting diode is constant.

11. The lighting device according to claim 1, characterized in that When the sampling and control unit is a microcontroller unit, the lighting device further comprises a microcontroller unit driver (70) connected between the positive electrode of the external power supply and the microcontroller unit, the microcontroller unit driver converting the voltage from the external power supply to drive the microcontroller unit.

12. The lighting device according to claim 1, wherein The sampling and control unit includes a voltage comparator connected to the sampling terminal and the output terminal, wherein the voltage comparator compares the sampled voltage with a preset value and outputs the comparison result from the output terminal.

13. The lighting device according to claim 1, characterized in that The lighting diode includes a red light emitting diode emitting red light, a green light emitting diode emitting green light, or a blue light emitting diode emitting blue light.

14. The lighting device according to claim 1, characterized in that The preset value is a value input from the outside or an initial value sampled by the sampling and control unit.

15. A lighting device capable of monitoring lighting quality, characterized in that: The lighting device comprises: a lighting diode (20) connected to an external power source (10) via a driver to receive power from the external power source and emit light; A sampling and control unit (30) is connected to the lighting diode, the sampling and control unit comprising: a sampling terminal for sampling the voltage of a specific device in the circuit when the lighting diode receives electrical energy and emits light, and an output terminal for making a judgment based on the sampled voltage and issuing a control signal; When the comparison result between the sampled voltage and the preset value changes, the output end of the sampling and control unit sends the control signal to the driver, and the driver changes the light-emitting state of the lighting diode according to the control signal.

16. The lighting device according to claim 15, characterized in that The sampling and control unit is a sensing element, which senses the voltage of the lighting diode in real time. When the comparison result between the sampled voltage and the preset value changes, the sampling and control unit controls the light-emitting state of the lighting diode to change through the control signal.

17. The lighting device according to claim 15, characterized in that The sampling and control unit is a microcontroller unit, which samples the voltage of the lighting diode at a predetermined sampling frequency. When the comparison result between the sampled voltage and the preset value changes, the sampling and control unit controls the lighting state of the lighting diode to change through the control signal.

18. The lighting device according to claim 16 or 17, characterized in that: The lighting device further comprises a voltage regulating device (80) connected between the lighting diode and ground, wherein when the lighting duration of the lighting diode reaches the rated life duration, the voltage of the voltage regulating device changes.

19. The lighting device according to claim 16, characterized in that The sampling and control unit includes a voltage comparator, wherein the voltage comparator is connected to the sampling terminal and the output terminal, wherein the voltage comparator compares the sampled voltage with a preset value and outputs the comparison result from the output terminal.

20. The lighting device according to claim 15, characterized in that The lighting state of the lighting diode changes to flickering or dimming.

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