A flame retardant lamp

Abstract

The present invention provides a flame-retardant lamp, comprising: a PCB board, a power supply, and a light-emitting panel disposed within the lamp body; a controller and a drive circuit disposed on the PCB board; and a first temperature sensor disposed on the light-emitting panel; the controller being electrically connected to the light-emitting panel via the drive circuit, the first temperature sensor being electrically connected to an input terminal of the controller, and the power supply being electrically connected to a power terminal on the PCB board; the controller being configured to execute a computer program stored therein to implement the following steps: obtaining a temperature value of the light-emitting panel via the first temperature sensor at predetermined intervals; comparing the current temperature value of the light-emitting panel with the temperature value of the light-emitting panel at a previous moment and generating a comparison result; and controlling the drive circuit to stop driving when it is determined, based on the comparison result, that the light-transmitting surface of the lamp body is covered, thereby extinguishing the light-emitting panel. This avoids the problem of fires that can occur in existing lamps due to the inability to dissipate heat when the light source is blocked.

Description

Technical Field

[0001] The present invention relates to the field of lamps, and in particular to a flame retardant lamp. Background Art

[0002] During the operation of the lamp, a large amount of heat will be generated in the light source. When the light source is not blocked, the heat will be automatically dissipated. However, when the lamp falls over or there is foreign matter in the light source of the lamp, causing the light source to be blocked, the heat at the light source will not be able to dissipate. This will cause the temperature of the light source to rise rapidly. Blocking the light source for a long time may cause damage to the lamp. When the covering is flammable, long-term high temperature will also cause the covering to carbonize, burn, or burn, which may lead to safety accidents and may even eventually cause a fire.

[0003] In view of this, this application is filed. Summary of the Invention

[0004] The invention discloses a flame retardant lamp, which aims to avoid the problem of fire caused by failure to dissipate heat when the light source of the existing lamp is blocked.

[0005] An embodiment of the present invention provides a flame-retardant lamp, comprising: a PCB board, a power supply, and a light-emitting board arranged inside a lamp body, a controller and a drive circuit arranged on the PCB board, and a first temperature sensor arranged on the light-emitting board;

[0006] The controller is electrically connected to the light-emitting board through the driving circuit, the first temperature sensor is electrically connected to the input terminal of the controller, and the power supply is electrically connected to the power supply terminal on the PCB board;

[0007] The controller is configured to implement the following steps by executing a computer program stored therein:

[0008] acquiring the temperature value of the light-emitting panel through the first temperature sensor at every preset time period;

[0009] Comparing the temperature value of the light-emitting panel at the current moment with the temperature value of the light-emitting panel at the previous moment, and generating a first comparison result;

[0010] When it is determined according to the first comparison result that the light-transmitting surface of the lamp body is covered, the driving circuit is controlled to stop driving so that the light-emitting panel is turned off.

[0011] Preferably, when it is determined according to the comparison result that the light-transmitting surface of the lamp body is covered, controlling the driving circuit to stop driving so as to extinguish the light-emitting panel is specifically:

[0012] When it is determined according to the comparison result that the difference between the temperature value of the light-emitting panel at the current moment and the temperature value of the light-emitting panel at the previous moment is greater than a preset threshold or the temperature change rate is greater than a preset threshold, it is determined that the light-transmitting surface of the lamp body is covered, and the driving circuit is controlled to stop driving so that the light-emitting panel is extinguished.

[0013] Preferably, it further comprises a second temperature sensor configured on the PCB board;

[0014] Wherein, the second temperature sensor is electrically connected to the input end of the controller.

[0015] Preferably, it also includes:

[0016] obtaining a temperature value inside the lamp body by using the second temperature sensor;

[0017] When it is determined that the temperature value inside the lamp body is greater than a preset threshold, the driving circuit is controlled to stop driving so that the light-emitting panel is extinguished.

[0018] Preferably, the lamp further comprises a key module disposed outside the lamp body, wherein the key module is electrically connected to the input end of the controller.

[0019] Preferably, it also includes a voltage sampling circuit;

[0020] The input end of the voltage sampling circuit is electrically connected to the power supply, and the output end of the voltage sampling circuit is electrically connected to the input end of the controller.

[0021] Preferably, the lamp further comprises an indicator light module arranged outside the lamp body, wherein the indicator light module is electrically connected to the output end of the controller.

[0022] Preferably, it also includes:

[0023] When a power-on request is detected by the key module, the voltage value of the battery is obtained by the voltage sampling circuit;

[0024] When it is determined that the voltage value is greater than a preset value, controlling the driving circuit to light up the light-emitting panel;

[0025] When it is determined that the voltage value is less than the preset value, the light-emitting panel is controlled to be in an off state, and the current voltage is displayed through the indicator light module.

[0026] Preferably, the method further comprises a third temperature sensor disposed on the inner wall of the light-transmitting surface, wherein the third temperature sensor is electrically connected to the input terminal of the controller; and the steps further comprise:

[0027] acquiring the temperature value of the light-transmitting surface by the third temperature sensor at every preset time period;

[0028] Comparing the temperature value of the light-transmitting surface at the current moment with the temperature value of the light-transmitting surface at the previous moment, and generating a second comparison result;

[0029] When it is determined according to the second comparison result that the difference between the temperature value at the light-transmitting surface at the current moment and the temperature value at the light-transmitting surface at the previous moment is greater than a preset threshold or the temperature change rate is greater than a preset threshold, the driving circuit is controlled to stop driving so that the light-emitting panel is extinguished.

[0030] Preferably, the device further comprises a fourth temperature sensor disposed on the inner wall of the light-transmitting surface and a fifth temperature sensor disposed on the lamp body away from the light-transmitting surface; the fourth temperature sensor and the fifth temperature sensor are both electrically connected to the input end of the controller; and the steps further comprise:

[0031] At every preset time period, the fourth temperature sensor is used to obtain the temperature value at the light-transmitting surface, and the fifth temperature sensor is used to obtain the temperature value outside the lamp body;

[0032] Comparing the temperature value at the light-transmitting surface at the current moment with the temperature value at the light-transmitting surface at the previous moment to obtain a first temperature change condition at the light-transmitting surface at the current moment; the first temperature change condition is a temperature change value or a temperature change rate;

[0033] Comparing the temperature value of the outer side of the lamp body at the current moment with the temperature value of the outer side of the lamp body at the previous moment to obtain a second temperature change condition of the outer side of the lamp body at the current moment;

[0034] When the first temperature change is greater than a preset first threshold and the second temperature change is less than or equal to the first threshold, controlling the light-emitting panel to be turned off;

[0035] When the first temperature change and the second temperature change are both greater than a preset first threshold, the light-emitting panel is controlled to keep working.

[0036] Based on a flame-retardant lamp provided by the present invention, the controller collects the temperature value on the light-emitting panel once every preset time period through the first temperature sensor. When it is detected that the difference between the temperature value at the current moment and the temperature value at the previous moment is greater than the preset value, it can be determined that the light-transmitting surface of the light-emitting panel is covered. At this time, the controller can control the driving circuit to stop driving, so that the light-emitting panel is extinguished, avoiding further temperature rise of the lamp, causing damage to the lamp, and at the same time avoiding the phenomenon of carbonization, burning, and burning of the covering due to high temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 This is a schematic diagram of a module of a flame-retardant lamp provided by an embodiment of the present invention;

[0038] Figure 2 This is a circuit diagram of a flame-retardant lamp provided by an embodiment of the present invention;

[0039] Figure 3 This is a schematic diagram of the flow of steps executed by the controller according to an embodiment of the present invention;

[0040] Figure 4 is a schematic diagram of a first temperature sensor provided by an embodiment of the present invention being configured on a light-emitting panel;

[0041] Figure 5 Schematic diagram of a second temperature sensor provided by an embodiment of the present invention configured on a PCB board;

[0042] Figure 6 is a schematic diagram of a third temperature sensor provided by an embodiment of the present invention being disposed on a light-transmitting surface;

[0043] Figure 7 It is a schematic diagram of the positions of the fourth temperature sensor and the fifth temperature sensor provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the invention for which protection is sought, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0045] The specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0046] The invention discloses a flame retardant lamp, which aims to avoid the problem of fire caused by failure to dissipate heat when the light source of the existing lamp is blocked.

[0047] See also Figures 1 to 6 The embodiment of the present invention provides a flame-retardant lamp, comprising: a PCB board 7, a power supply 8, and a light-emitting board 6 arranged inside the lamp body, a controller 1 and a drive circuit 2 arranged on the PCB board 7, and a first temperature sensor 4 arranged on the light-emitting board 6;

[0048] The controller 1 is electrically connected to the light-emitting board 6 through the driving circuit 2, the first temperature sensor 4 is electrically connected to the input terminal of the controller 1, and the power supply 8 is electrically connected to the power supply 8 terminal on the PCB board 7;

[0049] The controller 1 is configured to implement the following steps by executing the computer program stored therein:

[0050] Obtaining the temperature value of the light-emitting panel 6 through the first temperature sensor 4 at every preset time period;

[0051] Comparing the temperature value of the light-emitting panel 6 at the current moment with the temperature value of the light-emitting panel 6 at the previous moment, and generating a first comparison result;

[0052] When it is determined according to the first comparison result that the light-transmitting surface of the lamp body is covered, the driving circuit 2 is controlled to stop driving, so that the light-emitting panel 6 is turned off.

[0053] It should be noted that the inventors have found that in some small lamps and small work lamps, if they are forgotten to be turned off after use and are placed on a table or other objects, or the light outlet is covered, the light source will be blocked, causing the lamp to heat up quickly and the temperature to be unable to dissipate, which will lead to damage to the lamp and the phenomenon of carbonization, burning, and burning of the cover due to high temperature.

[0054] In this embodiment, the power supply 8 is used to power the lamp body and controller 1 configured on the light-emitting panel 6. It can be a rechargeable battery or other types of batteries. The controller 1 can collect the temperature value on the light-emitting panel 6 through the first temperature sensor 4. In this embodiment, the temperature value on the light-emitting panel 6 can be collected once every preset time period, for example, once every two minutes or five minutes. When the temperature value at the current moment is detected, it is compared with the temperature value at the previous moment to determine whether the light-transmitting surface is covered. When it is determined that the light-transmitting surface is covered, the controller 1 controls the drive circuit 2 to stop driving, so that the light-emitting panel 6 is extinguished. Specifically, in this embodiment, when it is determined according to the comparison result that the difference between the temperature value of the light-emitting panel 6 at the current moment and the temperature value of the light-emitting panel 6 at the previous moment is greater than the preset threshold value or the temperature change rate is greater than the preset threshold value, the distance is collected every five minutes, the temperature value of the light-emitting panel 6 when the time axis is 10 minutes is 50°C, and the temperature value of the light-emitting panel 6 when the time axis is 5 minutes is 40°C, the preset value, that is, the preset temperature rise is 3°C, and the difference is greater than the preset temperature rise, it is determined that the light-transmitting surface of the lamp body is covered, and the controller 1 extinguishes the light-emitting panel 6 through the driving circuit 2, that is, turns off the lamp body configured on the light-emitting panel 6.

[0055] In a possible embodiment of the present invention, the second temperature sensor 5 is further included and is arranged on the PCB board 7;

[0056] The second temperature sensor 5 is electrically connected to the input end of the controller 1 .

[0057] It should be noted that the second temperature sensor 5 is configured to collect the temperature value inside the lamp body. The temperature value inside the lamp body can also be used to determine whether the light-transmitting surface of the lamp body is blocked. When blocked, the internal temperature will also rise rapidly. In other embodiments, the second temperature sensor 5 can also be configured in other positions, which is not specifically limited here, but these solutions are all within the scope of protection of the present invention.

[0058] In a possible embodiment of the present invention, the controller 1 may perform the following steps:

[0059] Acquiring the temperature value inside the lamp body through the second temperature sensor 5;

[0060] When it is determined that the temperature value inside the lamp body is greater than a preset threshold, the driving circuit 2 is controlled to stop driving, so that the light-emitting panel 6 is extinguished.

[0061] It should be noted that, since the first temperature sensor 4 on the light-emitting panel 6 determines whether the lamp is covered every preset time period, if the program period is too long at the beginning, for example, collecting data once every 30 minutes, if the obstruction is collected five minutes before the last moment, then the difference between the last moment and the moment before the last moment may be less than the preset value. At this time, it is impossible to trigger the light to be turned off. Then the time when the obstruction occurs is within 35 minutes, and the temperature of the lamp body may be too high, or the obstruction may be ignited. Therefore, when the second temperature sensor 5 in this embodiment detects that the temperature value inside the lamp body is greater than the preset value, it is necessary to promptly control the drive circuit 2 to stop driving so that the light-emitting panel 6 is extinguished.

[0062] In a possible embodiment of the present invention, a key module 9 is further included that is arranged outside the lamp body, wherein the key module 9 is electrically connected to the input end of the controller 1 .

[0063] It should be noted that the button module 9 is used to control the operation of the lamp body between on and off. Of course, in other embodiments, other control methods can also be used to turn the lamp body on and off, such as a voice module. No specific limitation is made here, but these solutions are within the scope of protection of the present invention.

[0064] In a possible embodiment of the present invention, it further includes a voltage sampling circuit 10;

[0065] An input end of the voltage sampling circuit 10 is electrically connected to the power supply 8 , and an output end of the voltage sampling circuit 10 is electrically connected to an input end of the controller 1 .

[0066] It should be noted that the voltage sampling circuit 10 is used to collect the power of the power supply 8 in real time and transmit the power to the controller 1 in real time.

[0067] In a possible embodiment of the present invention, an indicator light module 11 is further included and is arranged outside the lamp body, wherein the indicator light module 11 is electrically connected to the output end of the controller 1 .

[0068] It should be noted that the indicator light module 11 can be configured to indicate the power level of the power supply 8. The indicator light module may include one or more LED lamp bodies, which can indicate the power level of the power supply 8 by changing the color of the LED lamp body, or measuring different numbers of LED lamp bodies to indicate the power level of the power supply 8. These schemes can be selected according to actual conditions and are not specifically limited here, but these schemes are all within the scope of protection of the present invention.

[0069] In a possible embodiment of the present invention, the method may further include:

[0070] When a power-on request is detected by the key module 9, the voltage value of the battery is obtained by the voltage sampling circuit 10;

[0071] When it is determined that the voltage value is greater than a preset value, the driving circuit 2 is controlled to light up the light-emitting panel 6;

[0072] When it is determined that the voltage value is less than the preset value, the light emitting panel 6 is controlled to be in an off state, and the current voltage is displayed through the indicator light module 11 .

[0073] It should be noted that, in this embodiment, the voltage value of the power supply 8 can be collected by the voltage sampling circuit 10. When the voltage value is less than a preset value, the lamp body on the light-emitting panel 6 is restricted from being turned on to avoid excessive discharge of the power supply 8, which may cause damage to the power supply 8.

[0074] In a possible embodiment of the present invention, a third temperature sensor 3 is further included, which is arranged on the inner wall of the light-transmitting surface. The third temperature sensor 3 is electrically connected to the input end of the controller 1 .

[0075] It should be noted that the third temperature sensor 3 can be configured on the inner surface of the light-transmitting surface. In other embodiments, it can also be set at other positions of the shell. No specific limitation is made here, but these solutions are all within the scope of protection of the present invention.

[0076] In a possible embodiment of the present invention, the method may further include:

[0077] Obtaining the temperature value inside the light-transmitting surface through the third temperature sensor 3 at every preset time period;

[0078] Comparing the temperature value of the light-transmitting surface at the current moment with the temperature value of the light-transmitting surface at the previous moment, and generating a second comparison result;

[0079] When it is determined according to the second comparison result that the difference between the temperature value at the light-transmitting surface at the current moment and the temperature value at the light-transmitting surface at the previous moment is greater than the preset threshold or the temperature change rate is greater than the preset threshold, the driving circuit 2 is controlled to stop driving so that the light-emitting panel 6 is extinguished.

[0080] It should be noted that the inventors further discovered that the light-transmitting surface is a surface that is in direct contact with the obstruction, and the change in temperature rise is most obvious when it is blocked. Among them, the collection interval of the third temperature sensor 3 configured on the shell can be smaller than the collection interval of the first temperature sensor 4 configured on the light-emitting sensor. Of course, in other embodiments, the intervals can also be the same, and different starting points can be set. For example, the temperature sensor configured on the shell starts collecting five minutes after the light-emitting panel 6 is lit, while the first temperature sensor 4 configured on the light-emitting panel 6 starts collecting three minutes after it is lit. By setting the third temperature sensor 3 on the shell, it is possible to quickly sense whether the light-transmitting surface is blocked.

[0081] Based on a flame-retardant lamp provided by the present invention, the controller 1 collects the temperature value on the light-emitting panel 6 once every preset time period through the first temperature sensor 4. When it is detected that the temperature value at the current moment and the temperature value at the previous moment are greater than the preset value, it can be determined that the light-transmitting surface of the light-emitting panel 6 is covered. At this time, the controller 1 can control the driving circuit 2 to stop driving, so that the light-emitting panel 6 is extinguished, avoiding further temperature rise of the lamp, causing damage to the lamp, and at the same time avoiding the phenomenon of carbonization, burning, and burning of the covering due to high temperature.

[0082] like Figure 7 As shown, in a possible embodiment of the present invention, it may also include:

[0083] A fourth temperature sensor 13 is disposed on the inner wall of the light-transmitting surface, and a fifth temperature sensor 12 is disposed on the lamp body away from the light-transmitting surface; the fourth temperature sensor 13 and the fifth temperature sensor 12 are both electrically connected to the input end of the controller; the steps further include:

[0084] At every preset time period, the fourth temperature sensor 13 is used to obtain the temperature value of the light-transmitting surface, and the fifth temperature sensor 12 is used to obtain the temperature value of the outside of the lamp body;

[0085] Comparing the temperature value at the light-transmitting surface at the current moment with the temperature value at the light-transmitting surface at the previous moment to obtain a first temperature change condition at the light-transmitting surface at the current moment; the first temperature change condition is a temperature change value or a temperature change rate;

[0086] Comparing the temperature value of the outer side of the lamp body at the current moment with the temperature value of the outer side of the lamp body at the previous moment to obtain a second temperature change condition of the outer side of the lamp body at the current moment;

[0087] When the first temperature change is greater than a preset first threshold and the second temperature change is less than or equal to the first threshold, controlling the light-emitting panel to be turned off;

[0088] When the first temperature change and the second temperature change are both greater than a preset first threshold, the light-emitting panel is controlled to keep working.

[0089] Among them, a fifth temperature sensor 12 is added in the above embodiment to judge the temperature change at the light-transmitting surface and thus determine whether it is covered. However, the reason for the temperature change at the light-transmitting surface may not only be due to being covered. For example, when the user enters a relatively hot environment, it may also cause a large temperature change value or temperature change rate at the light-transmitting surface, but the lamp should not be extinguished at this time.

[0090] To this end, in this embodiment, a fifth temperature sensor 12 is further provided within the lamp body, away from the light-transmitting surface. Fifth temperature sensor 12 is used to detect the temperature of the environment surrounding the lamp. Thus, based on the changing trends of fourth temperature sensor 13 and fifth temperature sensor 12, it can be determined whether the temperature change at fourth temperature sensor 13 is due to the environment or to the light-transmitting surface being covered by foreign matter, thus avoiding the inconvenience of turning off the lamp in inappropriate circumstances.

[0091] The above are only preferred embodiments of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention.

Claims

1. A flame retardant lamp, characterized in that: include: A PCB board, a power supply and a light-emitting board are arranged inside the lamp body, a controller and a driving circuit are arranged on the PCB board, and a first temperature sensor is arranged on the light-emitting board; The controller is electrically connected to the light-emitting board through the driving circuit, the first temperature sensor is electrically connected to the input terminal of the controller, and the power supply is electrically connected to the power supply terminal on the PCB board; The controller is configured to implement the following steps by executing a computer program stored therein: acquiring the temperature value of the light-emitting panel through the first temperature sensor at every preset time period; Comparing the temperature value of the light-emitting panel at the current moment with the temperature value of the light-emitting panel at the previous moment, and generating a first comparison result; When it is determined according to the first comparison result that the light-transmitting surface of the lamp body is covered, the driving circuit is controlled to stop driving so that the light-emitting panel is extinguished; the fourth temperature sensor is arranged on the inner wall of the light-transmitting surface and the fifth temperature sensor is arranged on the lamp body away from the light-transmitting surface; the fourth temperature sensor and the fifth temperature sensor are both electrically connected to the input terminal of the controller; the steps further include: At every preset time period, the fourth temperature sensor is used to obtain the temperature value at the light-transmitting surface, and the fifth temperature sensor is used to obtain the temperature value outside the lamp body; Comparing the temperature value at the light-transmitting surface at the current moment with the temperature value at the light-transmitting surface at the previous moment to obtain a first temperature change condition at the light-transmitting surface at the current moment; the first temperature change condition is a temperature change value or a temperature change rate; Comparing the temperature value of the outer side of the lamp body at the current moment with the temperature value of the outer side of the lamp body at the previous moment to obtain a second temperature change condition of the outer side of the lamp body at the current moment; When the first temperature change is greater than a preset first threshold and the second temperature change is less than or equal to the first threshold, controlling the light-emitting panel to be turned off; When the first temperature change and the second temperature change are both greater than a preset first threshold, the light-emitting panel is controlled to keep working.

2. A flame retardant lamp according to claim 1, characterized in that: When it is determined according to the comparison result that the light-transmitting surface of the lamp body is covered, controlling the driving circuit to stop driving so as to extinguish the light-emitting panel is specifically as follows: When it is determined according to the comparison result that the difference between the temperature value of the light-emitting panel at the current moment and the temperature value of the light-emitting panel at the previous moment is greater than a preset threshold or the temperature change rate is greater than a preset threshold, it is determined that the light-transmitting surface of the lamp body is covered, and the driving circuit is controlled to stop driving so that the light-emitting panel is extinguished.

3. The flame retardant lamp according to claim 1, characterized in that: Also includes a second temperature sensor configured on the PCB board; Wherein, the second temperature sensor is electrically connected to the input end of the controller.

4. A flame retardant lamp according to claim 3, characterized in that: Also includes: obtaining a temperature value inside the lamp body by using the second temperature sensor; When it is determined that the temperature value inside the lamp body is greater than a preset threshold, the driving circuit is controlled to stop driving so that the light-emitting panel is extinguished.

5. The flame retardant lamp according to claim 1, characterized in that: It also includes a key module configured outside the lamp body, wherein the key module is electrically connected to the input end of the controller.

6. The flame retardant lamp according to claim 5, characterized in that: Also included is a voltage sampling circuit; The input end of the voltage sampling circuit is electrically connected to the power supply, and the output end of the voltage sampling circuit is electrically connected to the input end of the controller.

7. A flame retardant lamp according to claim 6, characterized in that: It also includes an indicator light module arranged outside the lamp body, wherein the indicator light module is electrically connected to the output end of the controller.

8. The flame retardant lamp according to claim 7, characterized in that: Also includes: When a power-on request is detected by the key module, the voltage value of the battery is obtained by the voltage sampling circuit; When it is determined that the voltage value is greater than a preset value, controlling the driving circuit to light up the light-emitting panel; When it is determined that the voltage value is less than the preset value, the light-emitting panel is controlled to be in an off state, and the current voltage is displayed through the indicator light module.

9. The flame retardant lamp according to claim 1, characterized in that: The method further includes a third temperature sensor disposed on the inner wall of the light-transmitting surface, wherein the third temperature sensor is electrically connected to the input terminal of the controller; the steps further include: acquiring the temperature value of the light-transmitting surface by the third temperature sensor at every preset time period; Comparing the temperature value of the light-transmitting surface at the current moment with the temperature value of the light-transmitting surface at the previous moment, and generating a second comparison result; When it is determined according to the second comparison result that the difference between the temperature value at the light-transmitting surface at the current moment and the temperature value at the light-transmitting surface at the previous moment is greater than a preset threshold or the temperature change rate is greater than a preset threshold, the driving circuit is controlled to stop driving so that the light-emitting panel is extinguished.

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