CN218473452U

CN218473452U - COB lamp area

Info

Publication number: CN218473452U
Application number: CN202222848659.5U
Authority: CN
Inventors: 李荣刚; 李亚; 吴东
Original assignee: Zhangzhou Handing Intelligent Drive Technology Co ltd
Current assignee: Zhangzhou Handing Intelligent Drive Technology Co ltd
Priority date: 2022-10-27
Filing date: 2022-10-27
Publication date: 2023-02-10
Anticipated expiration: 2032-10-27

Abstract

The utility model relates to a COB lamp area, it includes the baseband, first luminous mechanism and second luminous mechanism are installed to the baseband, the power end of first luminous mechanism and the power end of second luminous mechanism all are connected with first power VCC1, current detection module and control module are installed to the baseband, the earthing terminal of first luminous mechanism is connected with control module's first control end, the earthing terminal of second luminous mechanism is connected with control module's second control end, control module's third control end is connected with current detection module's sense terminal, current detection module's output is connected with control module's input, current detection module's earthing terminal and control module's earthing terminal all are connected with power ground. This application has the effect that makes things convenient for COB lamp area to exceed the temperature that can bear when the temperature, and COB lamp area can continue the illumination and wait for the maintenance to change.

Description

COB lamp area

Technical Field

The application relates to the field of lamps and lanterns, especially relate to a COB lamp area.

Background

A COB lamp strip is a lamp in which an LED chip is mounted on a flexible substrate. COB lamp area is widely used in illumination and bill-board decoration.

COB lamp area generally is the constant voltage power supply, and COB lamp area can rise to being greater than the temperature that COB lamp area can bear because of ageing or the bad scheduling problem temperature of heat dissipation in the use to make the damage in COB lamp area cause the potential safety hazard. At present, a current detection module can be additionally installed on the conventional COB lamp strip, and the current of the COB lamp strip is detected through the current detection module, so that the temperature of the COB lamp strip is judged. Cut off being connected of COB lamp area and power when the electric current is too high to play the guard action.

To the correlation technique among the above-mentioned, the inventor thinks that when COB lamp area surpassed the temperature that can bear at the temperature, current detection module can cut off the COB lamp area and be connected between the power to make COB lamp area extinguish. But change COB lamp area and need some time to make COB lamp area when the lamp area maintenance is changed, COB lamp area is difficult to play the illuminating effect.

SUMMERY OF THE UTILITY MODEL

For COB lamp area when the temperature surpasss the temperature that can bear, COB lamp area can continue the illumination and wait for the maintenance to change, and this application provides a COB lamp area.

The application provides a COB lamp area adopts following technical scheme:

the utility model provides a COB lamp area, includes the baseband, first light-emitting mechanism and second light-emitting mechanism are installed to the baseband, the power end of first light-emitting mechanism and the power end of second light-emitting mechanism all are connected with first power VCC1, current detection module and control module are installed to the baseband, the earthing terminal of first light-emitting mechanism is connected with control module's first control end, the earthing terminal of second light-emitting mechanism is connected with control module's second control end, control module's third control end is connected with current detection module's sense terminal, current detection module's output is connected with control module's input, current detection module's earthing terminal and control module's earthing terminal all are connected with the power ground, current detection module is used for opening and close control module according to the electric current of first light-emitting mechanism and second light-emitting mechanism, control module is used for opening and close first light-emitting mechanism and second light-emitting mechanism in turn.

By adopting the technical scheme, when the first light-emitting mechanism and the second light-emitting mechanism are started, the current detection module can detect the total current of the first light-emitting mechanism and the second light-emitting mechanism. When first luminescence mechanism and second luminescence mechanism generate heat and exceed the temperature that COB lamp area can bear, the electric current that the current detection module detected increases to start control module. Control module controls first light-emitting mechanism and second light-emitting mechanism after starting and lights in turn to reduce the power in COB lamp area, let COB lamp area cool down. The user lights through first luminous mechanism and second luminous mechanism in turn to it is high to know COB lamp area temperature, needs to maintain the change. Before COB lamp area maintenance is changed, light through first light-emitting mechanism and second light-emitting mechanism in turn to make things convenient for COB lamp area when the temperature surpassed the temperature that can bear, COB lamp area can continue the illumination and wait for the maintenance to change.

Optionally, the first light-emitting mechanism includes a plurality of first light-emitting modules, the first light-emitting modules are mounted to the baseband at intervals along the length direction of the baseband, the second light-emitting mechanism includes a plurality of second light-emitting modules, a power end of each of the first light-emitting modules is connected to a power end of the first light-emitting mechanism, a ground end of each of the first light-emitting modules is connected to a ground end of the first light-emitting mechanism, the second light-emitting modules are mounted to the baseband at intervals along the length direction of the baseband, a second light-emitting module is disposed between two adjacent first light-emitting modules, a power end of each of the second light-emitting modules is connected to a power end of the second light-emitting mechanism, and a ground end of each of the second light-emitting modules is connected to a ground end of the second light-emitting mechanism.

By adopting the technical scheme, the first light-emitting module and the second light-emitting module are alternately arranged on the base band, so that the display brightness of the COB lamp band is uniform when the first light-emitting module and the second light-emitting module alternately emit light.

Optionally, the first light emitting module includes a plurality of first diodes D1, the first diodes D1 are light emitting diodes, each of the first diodes D1 is sequentially connected in series between a power end and a ground end of the first light emitting module, the second light emitting module includes a plurality of second diodes D2, the second diodes D2 are light emitting diodes, and each of the second diodes D2 is sequentially connected in series between a power end and a ground end of the second light emitting module.

By adopting the technical scheme, the first diode D1 is connected in series for improving the voltage of the first light-emitting module, and the second diode D2 is connected in series for improving the voltage of the second light-emitting module. And then the first light-emitting module and the second light-emitting module are connected in parallel to supply power by using a constant voltage power supply conveniently.

Optionally, the current detection module includes a first resistor R1, a second resistor R2, a third resistor R3, and a first comparator IC1, one end of the first resistor R1 and a forward input end of the first comparator IC1 are both connected to the detection end of the current detection module, an inverting input end of the first comparator IC1 is connected to one end of the second resistor R2 and one end of the third resistor R3, an output end of the first comparator IC1 and another end of the second resistor R2 are both connected to an output end of the current detection module, a power supply end of the first comparator IC1 is connected to the second power VCC2, and a ground end of the first comparator IC1, another end of the first resistor R1, and another end of the third resistor R3 are all connected to a ground end of the current detection module.

By adopting the above technical scheme, the first resistor R1 samples and converts the current of the first light emitting mechanism and the second light emitting mechanism into a voltage, and the voltage is input to the first comparator IC1. First comparator IC1, second resistor R2 and third resistor R3 constitute the amplifier to the voltage that makes first resistor R1 gather enlargies, and then makes things convenient for control module to receive the electric current in COB lamp area that current detection module gathered. By adjusting the ratio of the second resistor R2 and the third resistor R3, the amplification of the signal acquired by the first resistor R1 is adjusted.

Optionally, the control module includes a comparison sub-module, a first on-off sub-module and a second on-off sub-module, an input end of the comparison sub-module is connected to an input end of the control module, a power end of the comparison sub-module is connected to a second power VCC2, a first output end of the comparison sub-module is connected to an input end of the first on-off sub-module, a first control end of the first on-off sub-module is connected to a first control end of the control module, a second output end of the comparison sub-module is connected to an input end of the second on-off sub-module, a first control end of the second on-off sub-module is connected to a second control end of the control module, a second control end of the first on-off sub-module and a second control end of the second on-off sub-module are both connected to a third control end of the control module, a grounding end of the comparison sub-module, a grounding end of the first on-off sub-module and a grounding end of the second on-off sub-module are all connected to a power ground, the first control end of the first on-off sub-module and the second on-off sub-module are used for on-off and off of the second light emitting mechanism according to a current detected by the current detection module.

Through adopting above-mentioned technical scheme, after current detection module converted the electric current in COB lamp area that detects into voltage signal and sent control module, the voltage signal was received to the comparison submodule piece. When the current in COB lamp area is greater than the threshold value that COB lamp area can bear, the comparison submodule piece starts first break-make submodule piece and second break-make submodule piece in turn. When the first on-off submodule is started, the first light-emitting mechanism is lightened. When the first on-off submodule is closed, the first light-emitting mechanism is turned off. When the second switching sub-module is started, the second light-emitting mechanism is lightened. When the second switching-on sub-module is closed, the second light-emitting mechanism is turned off. First break-make submodule piece and the alternative start of second break-make submodule piece to make first luminescence mechanism and the alternative start of second luminescence mechanism, and then make things convenient for COB lamp area when the temperature exceedes the temperature that can bear, COB lamp area can continue the illumination and wait for the maintenance to change.

Optionally, the comparison sub-module includes a second comparator IC2, a third comparator IC3, a fourth resistor R4, a fifth resistor R5 and a sixth resistor R6, an inverting input terminal of the second comparator IC2 and a forward input terminal of the third comparator IC3 are both connected to an input terminal of the comparison sub-module, one end of the fourth resistor R4 is connected to a power supply terminal of the comparison sub-module, the other end of the fourth resistor R4 and a forward input terminal of the second comparator IC2 are both connected to one end of the fifth resistor R5, the other end of the fifth resistor R5 and an inverting input terminal of the third comparator IC3 are both connected to one end of the sixth resistor R6, the other end of the sixth resistor R6 is connected to a power ground, an output terminal of the second comparator IC2 is connected to a first output terminal of the comparison sub-module, and an output terminal of the third comparator IC3 is connected to a second output terminal of the comparison sub-module.

By adopting the above technical solution, the fourth resistor R4, the fifth resistor R5 and the sixth resistor R6 divide the voltage, thereby providing the reference voltage for the second comparator IC2 and the third comparator IC 3. When the voltage output by the current detection module is greater than the voltage of the positive input end of the second comparator IC2, the second comparator IC2 sends out a low level, so that the first on-off sub-module is started. The first on-off sub-module delays to turn off the first light-emitting mechanism, so that the voltage output by the current detection module is smaller than the voltages of the forward input end of the second comparator IC2 and the reverse input end of the third comparator IC 3. Then, the second comparator IC2 outputs a high level, and the third comparator IC3 outputs a low level. When the second comparator IC2 outputs a high level, the first on-off submodule delays and starts the first light-emitting mechanism; when the third comparator IC3 outputs a low level, the second on-off submodule delays to turn off the second light-emitting mechanism. Thereby causing the first and second light emitting mechanisms to alternately emit light.

Optionally, the first on-off submodule includes a first capacitor C1, a seventh resistor R7, and a first triode Q1, one end of the first capacitor C1 and one end of the seventh resistor R7 are both connected to the input end of the first on-off submodule, the other end of the seventh resistor R7 is connected to the base of the first triode Q1, the collector of the first triode Q1 is connected to the first control end of the first on-off submodule, the emitter of the first triode Q1 is connected to the second control end of the first on-off submodule, and the other end of the first capacitor C1 is connected to the ground end of the first on-off submodule.

By adopting the technical scheme, when the first on-off submodule receives a high level, the seventh resistor R7 charges the first capacitor C1, and the voltage of the first capacitor C1 gradually rises, so that a time delay effect is achieved. When the voltage of the first capacitor C1 is greater than the trigger voltage of the first transistor Q1, the first transistor Q1 is turned on, so that the first light emitting mechanism is lighted. When the first on-off submodule receives a low level, the first capacitor C1 discharges. When the voltage of the first capacitor C1 is less than the trigger voltage of the first transistor Q1, the first transistor Q1 is turned off, so that the first light emitting mechanism is turned off.

Optionally, the second switching sub-module includes a second capacitor C2, an eighth resistor R8, a ninth resistor R9, a second triode Q2 and a third triode Q3, one end of the second capacitor C2 and one end of the eighth resistor R8 are both connected to the input end of the second switching sub-module, the other end of the eighth resistor R8 is connected to the base of the second triode Q2, the collector of the second triode Q2 and the collector of the third triode Q3 are both connected to the first control end of the second switching sub-module, the emitter of the second triode Q2 and the emitter of the third triode Q3 are both connected to the second control end of the second switching sub-module, the base of the third triode Q3 is connected to one end of the ninth resistor R9, the other end of the ninth resistor R9 is connected to the third control end of the second switching sub-module, and the other end of the second capacitor C2 is connected to the ground end of the second switching sub-module.

By adopting the technical scheme, when the first light-emitting mechanism is lightened, the third triode Q3 is conducted; when the first light-emitting mechanism is turned off, the third triode Q3 is cut off. Meanwhile, when the second switching sub-module receives a high level, the eighth resistor R8 charges the second capacitor C2, the voltage of the second capacitor C2 gradually increases, and when the voltage of the second capacitor C2 is greater than the trigger voltage of the second triode Q2, the second triode Q2 is switched on. When the second switching sub-module receives a low level, the second capacitor C2 discharges, and when the voltage of the second capacitor C2 is less than the trigger voltage of the second triode Q2, the second triode Q2 is cut off. The second light-emitting mechanism is controlled by the second triode Q2 and the third triode Q3 together, so that the first light-emitting mechanism and the second light-emitting mechanism are alternately switched on and off.

In summary, the present application includes at least one of the following beneficial technical effects:

1. when COB lamp area used, the electric current in COB lamp area was detected to the current detection module, and when the electric current in COB lamp area was greater than the electric current that COB lamp area can bear, it was serious to explain that COB lamp area generates heat. The current detection module starts the control module, and the control module alternately starts the first light-emitting mechanism and the second light-emitting mechanism, so that the power of the COB lamp strip is reduced. Through the power that reduces COB lamp area to make things convenient for COB lamp area to cool down. Simultaneously through first light-emitting mechanism and the alternative start-up of second light-emitting mechanism to make things convenient for COB lamp area when the temperature surpasss the temperature that can bear, COB lamp area can continue the illumination and wait for the maintenance to change.

Drawings

FIG. 1 is a functional block diagram of an embodiment of the present application;

FIG. 2 is a schematic diagram of the overall structure of an embodiment of the present application;

FIG. 3 is a circuit diagram of a first lighting mechanism of an embodiment of the present application;

FIG. 4 is a circuit diagram of a second light emitting mechanism of an embodiment of the present application;

fig. 5 is an overall circuit diagram of an embodiment of the present application.

Description of the reference numerals: 1. a baseband; 2. a first light emitting mechanism; 21. a first light-emitting module; 3. a second light emitting mechanism; 31. a second light emitting module; 4. a current detection module; 5. a control module; 51. a comparison submodule; 52. a first on-off submodule; 53. and a second switching-off submodule.

Detailed Description

The present application is described in further detail below with reference to figures 1-5.

The embodiment of the application discloses COB lamp area.

Referring to fig. 1 and 2, a COB lamp strip includes a current detection module 4, a control module 5, a base band 1, a first light-emitting mechanism 2, and a second light-emitting mechanism 3.

Referring to fig. 2 and 3, the first lighting mechanism 2 includes a plurality of first lighting modules 21, a power terminal of each first lighting module 21 is connected to the power terminal of the first lighting mechanism 2, and a ground terminal of each first lighting module 21 is connected to the ground terminal of the first lighting mechanism 2. The first light-emitting modules 21 are attached to the base tape 1 at intervals in the longitudinal direction of the base tape 1. The first light emitting module 21 includes a plurality of first diodes D1, and the first diodes D1 are light emitting diodes. Each of the first diodes D1 is sequentially connected in series between a power terminal and a ground terminal of the first light emitting module 21.

Referring to fig. 2 and 4, the second light emitting mechanism 3 includes a plurality of second light emitting modules 31, and the second light emitting modules 31 are mounted on the base tape 1 at intervals along the length direction of the base tape 1. A second light-emitting module 31 is arranged between two adjacent first light-emitting modules 21, and a power supply end of each second light-emitting module 31 is connected to a power supply end of the second light-emitting mechanism 3. The ground terminal of each second light emitting module 31 is connected to the ground terminal of the second light emitting mechanism 3. The second light emitting module 31 includes a plurality of second diodes D2, and the second diodes D2 are light emitting diodes. Each of the second diodes D2 is sequentially connected in series between the power terminal and the ground terminal of the second light emitting module 31.

Referring to fig. 1 and 5, the power supply terminal of the first light-emitting mechanism 2 and the power supply terminal of the second light-emitting mechanism 3 are both connected to a first power supply VCC1. First power VCC1 supplies power for the constant voltage power supply in COB lamp area. The ground terminal of the first light-emitting mechanism 2 is connected to the first control terminal of the control module 5, and the ground terminal of the second light-emitting mechanism 3 is connected to the second control terminal of the control module 5. And a third control end of the control module 5 is connected to the detection end of the current detection module 4. The output end of the current detection module 4 is connected to the input end of the control module 5. The ground terminal of the current detection module 4 and the ground terminal of the control module 5 are both connected to the power ground.

The current detection module 4 detects the current of the first light-emitting mechanism 2 and the second light-emitting mechanism 3 to form a voltage signal, and sends the voltage signal to the control module 5. When the temperature of the COB light strip rises, the currents of the first lighting mechanism 2 and the second lighting mechanism 3 also increase, so that the voltage signal received by the control module 5 increases. When the temperature in COB lamp area rises to the temperature that surpasss COB lamp area and can bear, voltage signal can be greater than the predetermined threshold value of control module 5 to make control module 5 start. After the control module 5 is started, the first light-emitting mechanism 2 and the second light-emitting mechanism 3 are alternately started, so that the power of the COB lamp strip is reduced and cooled. Meanwhile, the first light-emitting modules 21 and the second light-emitting modules 31 are alternately arranged on the COB lamp strip, so that the COB lamp strip is convenient to cool, and the brightness is kept uniform.

Referring to fig. 1 and 5, the current detection module 4 includes a first resistor R1, a second resistor R2, a third resistor R3, and a first comparator IC1. One end of the first resistor R1 and the positive input end of the first comparator IC1 are both connected to the detection end of the current detection module 4, and the negative input end of the first comparator IC1 is connected to one end of the second resistor R2 and one end of the third resistor R3. The output end of the first comparator IC1 and the other end of the second resistor R2 are both connected to the output end of the current detection module 4, and the power supply end of the first comparator IC1 is connected to the second power supply VCC2. The second power VCC2 is a power generated by the first power VCC1 after voltage reduction and stabilization. The ground terminal of the first comparator IC1, the other end of the first resistor R1, and the other end of the third resistor R3 are all connected to the ground terminal of the current detection module 4.

The first resistor R1 is a sampling voltage, so that the currents of the first and second

light emitting mechanisms

2 and 3 are converted into voltage signals to be input to the positive input terminal of the first comparator IC1. The first comparator IC1 and the second comparator IC2 constitute an amplifier, and the amplification factor is adjusted by the ratio of the resistance values of the second resistor R2 and the third resistor R3. The voltage signal is amplified and then input into the control module 5, so that the control module 5 can receive the voltage signal conveniently.

Referring to fig. 1 and 5, the control module 5 includes a comparison submodule 51, a first on-off submodule 52 and a second on-off submodule 53, an input terminal of the comparison submodule 51 is connected to an input terminal of the control module 5, a power supply terminal of the comparison submodule 51 is connected to a second power supply VCC2, and the second power supply VCC2 is obtained by the first power supply VCC1 through voltage reduction and voltage stabilization. A first output of the comparison submodule 51 is connected to an input of a first on-off submodule 52. The first control end of the first on-off submodule 52 is connected to the first control end of the control module 5, the second output end of the comparison submodule 51 is connected to the input end of the second on-off submodule 53, and the first control end of the second on-off submodule 53 is connected to the second control end of the control module 5. The second control end of the first switching submodule 52 and the second control end of the second switching submodule 53 are both connected to the third control end of the control module 5. The ground terminal of the comparison sub-module 51, the ground terminal of the first on-off sub-module 52 and the ground terminal of the second on-off sub-module 53 are all connected to the power ground. The first control terminal of the first switching submodule 52 is also connected to the third control terminal of the second switching submodule 53.

Referring to fig. 1 and 5, the comparison sub-module 51 includes a second comparator IC2, a third comparator IC3, a fourth resistor R4, a fifth resistor R5, and a sixth resistor R6. The inverting input terminal of the second comparator IC2 and the positive input terminal of the third comparator IC3 are both connected to the input terminal of the comparison sub-module 51, and one end of the fourth resistor R4 is connected to the power supply terminal of the comparison sub-module 51. The other end of the fourth resistor R4 and the positive input terminal of the second comparator IC2 are connected to one end of a fifth resistor R5, and the other end of the fifth resistor R5 and the negative input terminal of the third comparator IC3 are connected to one end of a sixth resistor R6. The other end of the sixth resistor R6 is connected to the power ground. The output of the second comparator IC2 is connected to a first output of the comparison submodule 51 and the output of the third comparator IC3 is connected to a second output of the comparison submodule 51.

The fourth, fifth and sixth resistors R4, R5 and R6 function as a voltage divider to provide a reference voltage to the positive input terminal of the second comparator IC2 and the negative input terminal of the third comparator IC 3. When the voltage output by the current detection module 4 is greater than the positive input end of the second comparator IC2, the second comparator IC2 outputs a low level, and the third comparator IC3 outputs a high level. When the voltage output by the current detection module 4 is smaller than the voltage at the positive input end of the second comparator IC2 and larger than the negative input end of the third comparator IC3, the second comparator IC2 outputs a high level, and the third comparator IC3 outputs a high level. When the voltage output by the current detection module 4 is less than the inverting input terminal of the third comparator IC3, the second comparator IC2 outputs a high level, and the third comparator IC3 outputs a low level.

Referring to fig. 1 and 5, the first switching submodule 52 includes a first capacitor C1, a seventh resistor R7, and a first transistor Q1. One end of the first capacitor C1 and one end of the seventh resistor R7 are both connected to the input end of the first on-off submodule 52, and the other end of the seventh resistor R7 is connected to the base of the first triode Q1. The collector of the first transistor Q1 is connected to a first control terminal of the first on-off submodule 52. An emitter of the first transistor Q1 is connected to the second control terminal of the first on-off submodule 52, and the other end of the first capacitor C1 is connected to the ground terminal of the first on-off submodule 52.

When the second comparator IC2 outputs a high level, the seventh resistor R7 charges the first capacitor, when the voltage of the first capacitor C1 is greater than the trigger voltage of the first triode Q1, the first triode Q1 is turned on, and when the first triode Q1 is turned on, the first light emitting mechanism 2 lights up. When the second comparator IC2 outputs a low level, the first capacitor is discharged, and when the voltage of the first capacitor C1 is less than the trigger voltage of the first transistor Q1, the first transistor Q1 is turned off. When the first triode Q1 is cut off, the first light-emitting mechanism 2 is turned off, thereby playing a role of delaying the on-off of the first light-emitting mechanism 2.

The second switching submodule 53 includes a second capacitor C2, an eighth resistor R8, a ninth resistor R9, a second transistor Q2, and a third transistor Q3, and one end of the second capacitor C2 and one end of the eighth resistor R8 are both connected to an input end of the second switching submodule 53. The other end of the eighth resistor R8 is connected to the base of the second triode Q2, and the collector of the second triode Q2 and the collector of the third triode Q3 are both connected to the first control end of the second switching-on submodule 53. The emitter of the second triode Q2 and the emitter of the third triode Q3 are both connected to the second control end of the second switching-on submodule 53, and the base of the third triode Q3 is connected to one end of the ninth resistor R9. The other end of the ninth resistor R9 is connected to the third control terminal of the second switching sub-module 53, and the other end of the second capacitor C2 is connected to the ground terminal of the second switching sub-module 53.

When the third comparator IC3 outputs a high level, the eighth resistor R8 charges the second capacitor, and when the voltage of the second capacitor C2 is greater than the trigger voltage of the second transistor Q2, the second transistor Q2 is turned on. When the third comparator IC3 outputs a low level, the second capacitor is discharged, and when the voltage of the second capacitor C2 is less than the trigger voltage of the second transistor Q2, the second transistor Q2 is turned off. Meanwhile, when the first light-emitting mechanism 2 emits light, the third triode Q3 is conducted; when the first light-emitting mechanism 2 is turned off, the third triode Q3 is cut off. The second light emitting mechanism 3 is turned on and off together by the second triode Q2 and the third triode Q3, so that the first light emitting mechanism 2 and the second light emitting mechanism 3 are turned on and off alternately.

The implementation principle in this application embodiment of a COB lamp area does: when COB lamp area starts, current detection module 4 detects the electric current in COB lamp area, and generates voltage signal and sends to control module 5. When the temperature in COB lamp area is normal, voltage signal is less than the voltage of the positive input end of second comparator IC2, and is greater than the voltage of the reverse input end of third comparator IC3 to make second comparator IC2 output high level, third comparator IC3 output high level. The second comparator IC2 outputs a high level, thereby turning on the first triode Q1 and the third triode Q3; the third comparator IC3 outputs a high level, thereby turning on the second transistor Q2. The first triode Q1, the second triode Q2, and the third triode Q3 are all turned on, thereby causing the first light emitting mechanism 2 and the second light emitting mechanism 3 to illuminate.

When the COB lamp area rises gradually to surpassing bearable temperature, voltage signal is greater than the voltage of second comparator IC 2's positive input end, and second comparator IC2 exports low level. When the second comparator IC2 outputs a low level, the first capacitor C1 supplies power to the base of the first transistor Q1, so that the first transistor Q1 continues to be turned on. After the voltage of the first capacitor C1 is lower than the trigger voltage of the base of the first triode Q1, the first triode Q1 is turned off, the first light-emitting mechanism 2 is turned off, and the third triode Q3 is turned off.

After the first lighting mechanism 2 is turned off, the current in the COB lamp strip decreases, so that the voltage signal is smaller than the voltage at the inverting input terminal of the third comparator IC 3. Then, the second comparator IC2 outputs a high level, and the third comparator IC3 outputs a low level. After the second comparator IC2 outputs a high level, the seventh resistor R7 charges the first capacitor C1; after the third comparator IC3 outputs a low level, the second capacitor C2 supplies power to the base of the second diode D2. After the voltage of the second capacitor C2 is lower than the trigger voltage of the second transistor Q2, the second transistor Q2 is turned off, so that the second light emitting mechanism 3 is turned off. After the voltage of the first capacitor C1 rises to be greater than the trigger voltage of the base of the first triode Q1, the first triode Q1 is turned on, and the first light-emitting mechanism 2 lights up. After the first light emitting mechanism 2 is turned on, the third transistor Q3 is turned on, so that the second light emitting mechanism 3 is turned on. Current detection module 4 continues to detect the electric current of first light-emitting mechanism 2 and second light-emitting mechanism 3 afterwards, so relapse to make first light-emitting mechanism 2 and second light-emitting mechanism 3 start in turn, and then make things convenient for COB lamp area when the temperature surpassed the temperature that can bear, COB lamp area can continue the illumination and wait for the maintenance to change.

The above are preferred embodiments of the present application, and the scope of protection of the present application is not limited thereto, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a COB lamp area which characterized in that: the lighting device comprises a baseband (1), wherein a first lighting mechanism (2) and a second lighting mechanism (3) are installed on the baseband (1), a power end of the first lighting mechanism (2) and a power end of the second lighting mechanism (3) are both connected with a first power VCC1, a current detection module (4) and a control module (5) are installed on the baseband (1), a grounding end of the first lighting mechanism (2) is connected with a first control end of the control module (5), a grounding end of the second lighting mechanism (3) is connected with a second control end of the control module (5), a third control end of the control module (5) is connected with a detection end of the current detection module (4), an output end of the current detection module (4) is connected with an input end of the control module (5), the grounding end of the current detection module (4) and the grounding end of the control module (5) are both connected with a power ground, the current detection module (4) is used for controlling the on and off of the control module (5) according to the first lighting mechanism (2) and the second lighting mechanism (3), and the control module (5) is used for alternately turning on and off the second lighting mechanism (3).

2. The COB lamp strip of claim 1, characterized in that: the first light-emitting mechanism (2) comprises a plurality of first light-emitting modules (21), the first light-emitting modules (21) are mounted on the base band (1) at intervals along the length direction of the base band (1), the second light-emitting mechanism (3) comprises a plurality of second light-emitting modules (31), the power end of each first light-emitting module (21) is connected with the power end of the first light-emitting mechanism (2), the grounding end of each first light-emitting module (21) is connected with the grounding end of the first light-emitting mechanism (2), the second light-emitting modules (31) are mounted on the base band (1) at intervals along the length direction of the base band (1), one second light-emitting module (31) is arranged between every two adjacent first light-emitting modules (21), the power end of each second light-emitting module (31) is connected with the power end of the second light-emitting mechanism (3), and the grounding end of each second light-emitting module (31) is connected with the grounding end of the second light-emitting mechanism (3).

3. The COB lamp strip of claim 2, characterized in that: the first light-emitting module (21) comprises a plurality of first diodes D1, the first diodes D1 are light-emitting diodes, each first diode D1 is sequentially connected between a power supply end and a grounding end of the first light-emitting module (21) in series, the second light-emitting module (31) comprises a plurality of second diodes D2, the second diodes D2 are light-emitting diodes, and each second diode D2 is sequentially connected between a power supply end and a grounding end of the second light-emitting module (31) in series.

4. The COB lamp strip of claim 1, characterized in that: the current detection module (4) comprises a first resistor R1, a second resistor R2, a third resistor R3 and a first comparator IC1, one end of the first resistor R1 and the positive input end of the first comparator IC1 are connected with the detection end of the current detection module (4), the negative input end of the first comparator IC1 is connected with one end of the second resistor R2 and one end of the third resistor R3, the output end of the first comparator IC1 and the other end of the second resistor R2 are connected with the output end of the current detection module (4), the power supply end of the first comparator IC1 is connected with a second power supply VCC2, and the grounding end of the first comparator IC1, the other end of the first resistor R1 and the other end of the third resistor R3 are connected with the grounding end of the current detection module (4).

5. The COB lamp strip of claim 1, characterized in that: the control module (5) comprises a comparison submodule (51), a first on-off submodule (52) and a second on-off submodule (53), the input end of the comparison submodule (51) is connected with the input end of the control module (5), the power end of the comparison submodule (51) is connected with a second power supply VCC2, the first output end of the comparison submodule (51) is connected with the input end of the first on-off submodule (52), the first control end of the first on-off submodule (52) is connected with the first control end of the control module (5), the second output end of the comparison submodule (51) is connected with the input end of the second on-off submodule (53), the first control end of the second on-off submodule (53) is connected with the second control end of the control module (5), the second control end of the first on-off submodule (52) and the second control end of the second on-off submodule (53) are both connected with the third control end of the control module (5), the ground end of the comparison submodule (51), the ground end of the comparison submodule (52) and the ground end of the second on-off submodule (53) are both connected with the first on-off submodule (53) and the ground end of the comparison submodule (53) and the on-off submodule (53) is connected with the second on-off submodule (4) and used for detecting the on-off submodule (4), the first on-off submodule (52) is used for opening and closing the first light-emitting mechanism (2), and the second on-off submodule (53) is used for opening and closing the second light-emitting mechanism (3).

6. The COB light strip of claim 5, wherein: the comparison submodule (51) comprises a second comparator IC2, a third comparator IC3, a fourth resistor R4, a fifth resistor R5 and a sixth resistor R6, wherein the reverse input end of the second comparator IC2 and the forward input end of the third comparator IC3 are connected with the input end of the comparison submodule (51), one end of the fourth resistor R4 is connected with the power supply end of the comparison submodule (51), the other end of the fourth resistor R4 and the forward input end of the second comparator IC2 are connected with one end of the fifth resistor R5, the other end of the fifth resistor R5 and the reverse input end of the third comparator IC3 are connected with one end of a sixth resistor R6, the other end of the sixth resistor R6 is connected with the power ground, the output end of the second comparator IC2 is connected with the first output end of the comparison submodule (51), and the output end of the third comparator IC3 is connected with the second output end of the comparison submodule (51).

7. The COB light strip of claim 5, wherein: the first on-off submodule (52) comprises a first capacitor C1, a seventh resistor R7 and a first triode Q1, one end of the first capacitor C1 and one end of the seventh resistor R7 are connected with the input end of the first on-off submodule (52), the other end of the seventh resistor R7 is connected with the base electrode of the first triode Q1, the collector electrode of the first triode Q1 is connected with the first control end of the first on-off submodule (52), the emitter electrode of the first triode Q1 is connected with the second control end of the first on-off submodule (52), and the other end of the first capacitor C1 is connected with the grounding end of the first on-off submodule (52).

8. The COB light strip of claim 5, wherein: the second switching submodule (53) comprises a second capacitor C2, an eighth resistor R8, a ninth resistor R9, a second triode Q2 and a third triode Q3, one end of the second capacitor C2 and one end of the eighth resistor R8 are both connected with the input end of the second switching submodule (53), the other end of the eighth resistor R8 is connected with the base electrode of the second triode Q2, the collector electrode of the second triode Q2 and the collector electrode of the third triode Q3 are both connected with the first control end of the second switching submodule (53), the emitter electrode of the second triode Q2 and the emitter electrode of the third triode Q3 are both connected with the second control end of the second switching submodule (53), the base electrode of the third triode Q3 is connected with one end of the ninth resistor R9, the other end of the ninth resistor R9 is connected with the third control end of the second switching submodule (53), and the other end of the second capacitor C2 is connected with the ground terminal of the second switching submodule (53).