Light control circuit and lighting device

Abstract

The utility model relates to a light control circuit and a lighting device, the circuit comprises a power supply conversion module, a load driving module and a switching control module, and the power supply conversion module is used for connecting an input power supply; the power supply conversion module is also used for connecting a light assembly to supply power to the light assembly; the light assembly comprises at least two light-emitting components. The load driving module is connected with the power conversion module and the light assembly. The switching control module is connected with the power supply conversion module and the load driving module, and the switching control module is configured to control the load driving module to switch the corresponding light-emitting component to emit light according to the on-off of the input power supply, so that the accurate switching control of the corresponding light-emitting component in the light assembly is realized, the error of light state switching is further reduced, and the switching efficiency is improved. The accuracy of light switching is improved, and the reliability of circuit control is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of lighting, in particular to a light control circuit and a lighting device. BACKGROUND

[0002] With the development of lighting technology, the intelligent degree of lighting is getting higher and higher. The intelligent development of lighting makes the light system more intelligent and convenient. For example, through intelligent sensing and dimming technology, the light system can adjust the lighting intensity and color temperature according to the environmental light and the user's activity, so that the indoor and outdoor lighting is more in line with the user's needs, and the energy waste is reduced.

[0003] At present, in the existing light switching system, the error of light state switching is large, which easily leads to temporary failure of light state switching, and the accuracy of light switching is low, which affects the reliability of the system. CONTENT OF THE INVENTION

[0004] Therefore, it is necessary to provide a light control circuit and a lighting device which can reduce the error of light state switching, improve the accuracy and reliability of light switching, aiming at the problems existing in the above-mentioned existing light switching system.

[0005] In a first aspect, the present application provides a light control circuit, comprising:

[0006] A power conversion module is used to connect an input power supply; the power conversion module is also used to connect a light component to supply power to the light component; the light component comprises at least two light emitting parts;

[0007] A load driving module is connected to the power conversion module and the light component;

[0008] A switching control module is connected to the power conversion module and the load driving module, and the switching control module is configured to control the load driving module to switch the corresponding light emitting part to emit light according to the on-off of the input power supply.

[0009] In one embodiment, the power conversion module comprises a first voltage conversion circuit and a second voltage conversion circuit; the light component comprises a first light emitting part and a second light emitting part;

[0010] The input end of the first voltage conversion circuit is used to connect the input power supply, and the output end of the first voltage conversion circuit is connected to the input end of the second voltage conversion circuit and the first light emitting part;

[0011] The output end of the second voltage conversion circuit is connected to the switching control module and the load driving module, and the second light emitting part is connected to the input power supply.

[0012] In one embodiment, the power conversion module further comprises a power protection circuit and a rectifier filter circuit;

[0013] The input end of the power protection circuit is connected with an input power supply, and the output end of the power protection circuit is connected with the input end of the rectification filtering circuit and the second light-emitting component;

[0014] The output end of the rectification filtering circuit is connected with the first voltage conversion circuit.

[0015] In one embodiment, the first voltage conversion circuit comprises a power chip, a first capacitor, a second capacitor, a third capacitor, a first resistor, a second resistor, a third resistor, a first diode, a second diode and a first inductor;

[0016] The first pin of the power chip is connected with the first end of the first capacitor and the cathode of the first diode respectively, the second end of the first capacitor is connected with the cathode of the second diode, the anode of the second diode is connected with a ground wire, the anode of the first diode is connected with the first end of the first resistor, and the second end of the first resistor is connected with the ground wire; the second pin of the power chip is connected with the second end of the first capacitor, the third pin of the power chip is connected with the first end of the second capacitor, and the second end of the second capacitor is connected with the second end of the first capacitor; the fourth pin of the power chip is connected with the first end of the second resistor and the first end of the third resistor respectively, the second end of the second resistor is connected with the second end of the first capacitor, and the second end of the third resistor is connected with the second end of the first capacitor; the fifth pin, the sixth pin, the seventh pin and the eighth pin of the power chip are connected with the positive electrode of the third capacitor respectively, and the negative electrode of the third capacitor is connected with the ground wire;

[0017] The first end of the first inductor is connected with the second end of the first capacitor, and the second end of the first inductor is connected with the first end of the first resistor.

[0018] In one embodiment, the second voltage conversion circuit comprises a voltage stabilizing chip, a fourth capacitor, a fifth capacitor, a sixth capacitor, a seventh capacitor, an eighth capacitor, a fourth resistor and a third diode;

[0019] The input pin of the voltage stabilizing chip is connected with the first end of the fourth capacitor, the positive electrode of the fifth capacitor and the first end of the fourth resistor respectively, the second end of the fourth capacitor is connected with the ground wire, the negative electrode of the fifth capacitor is connected with the ground wire, the second end of the fourth resistor is connected with the cathode of the third diode, the anode of the third diode is connected with the positive electrode of the sixth capacitor, and the negative electrode of the sixth capacitor is connected with the ground wire;

[0020] The output pin of the voltage stabilizing chip is connected with the first end of the seventh capacitor and the first end of the eighth capacitor respectively, the second end of the seventh capacitor is connected with the ground wire, and the second end of the eighth capacitor is connected with the ground wire; the ground pin of the voltage stabilizing chip is connected with the ground wire.

[0021] In one embodiment, the load driving module comprises a first driving circuit and a second driving circuit;

[0022] The first driving circuit is connected between the switching control module and the first light-emitting component, and the second driving circuit is connected between the switching control module and the second light-emitting component.

[0023] In one embodiment, the first driving circuit comprises a first switch tube, a fifth resistor and a sixth resistor.

[0024] The gate of the first switch tube is connected to the first end of the fifth resistor and the first end of the sixth resistor respectively, the first end of the fifth resistor is connected to the ground wire, and the second end of the sixth resistor is connected to the switching control module; the source of the first switch tube is connected to the ground wire, and the drain of the first switch tube is connected to the first light-emitting component.

[0025] In one embodiment, the second driving circuit comprises a driving chip, a seventh resistor, an eighth resistor, a ninth resistor and a bidirectional thyristor.

[0026] The first pin of the driving chip is connected to the first end of the seventh resistor, and the second end of the seventh resistor is connected to the second voltage conversion circuit.

[0027] The second pin of the driving chip is connected to the switching control module, the third pin of the driving chip is connected to the first end of the eighth resistor and the first end of the bidirectional thyristor respectively, the second end of the eighth resistor is connected to the second light-emitting component, the second end of the bidirectional thyristor is connected to the second end of the eighth resistor, and the third end of the bidirectional thyristor is connected to the input end of the power conversion module.

[0028] The fifth pin of the driving chip is connected to the first end of the ninth resistor, and the second end of the ninth resistor is connected to the third end of the bidirectional thyristor.

[0029] In one embodiment, the switching control module comprises a control chip, a first triode, a tenth resistor, an eleventh resistor, a twelfth resistor and a ninth capacitor.

[0030] The first pin of the control chip is connected to the second voltage conversion circuit; the second pin of the control chip is connected to the collector of the first triode, the emitter of the first triode is connected to the ground wire, the base of the first triode is connected to the first end of the tenth resistor, the second end of the tenth resistor is connected to the first end of the eleventh resistor and the first end of the twelfth resistor respectively, the second end of the eleventh resistor is connected to the input end of the power conversion module, the second end of the twelfth resistor is connected to the ground wire, the first end of the ninth capacitor is connected to the second end of the tenth resistor, and the second end of the ninth capacitor is connected to the ground wire.

[0031] The third pin of the control chip is connected to the ground wire, and the fourth pin and the fifth pin of the control chip are connected to the load driving module.

[0032] In a second aspect, the application provides a lighting device, comprising a light assembly and a light control circuit as described in any one of the above embodiments; the light control circuit is connected to the light assembly.

[0033] One of the above technical solutions has the following advantages and beneficial effects:

[0034] In the above light control circuit, the power conversion module is used to connect the input power; the power conversion module is also used to connect the light assembly to supply power to the light assembly; the light assembly includes at least two light emitting components; the load driving module is connected to the power conversion module and the light assembly; the switching control module is connected to the power conversion module and the load driving module, and the switching control module is configured to control the load driving module to switch the corresponding light emitting components to emit light according to the on-off of the input power, thereby achieving precise switching control of the corresponding light emitting components in the light assembly. The power conversion module converts the input power and supplies power to the light assembly, the load driving module and the switching control module to meet the power supply requirements of the light assembly, the load driving module and the switching control module. The switching control module controls the load driving module to work according to the on-off of the input power, and then the load driving module switches the corresponding light emitting components in the light assembly to emit light, thereby achieving precise switching control of each light emitting component in the light assembly, reducing the error of light state switching, improving the accuracy of light switching, and improving the reliability of circuit control. BRIEF DESCRIPTION OF DRAWINGS

[0035] Figure 1 It is a first block schematic diagram of the light control circuit in one embodiment;

[0036] Figure 2 It is a second block schematic diagram of the light control circuit in one embodiment;

[0037] Figure 3 It is a third block schematic diagram of the light control circuit in one embodiment;

[0038] Figure 4 It is a fourth block schematic diagram of the light control circuit in one embodiment;

[0039] Figure 5 It is a circuit schematic diagram of the light control circuit in one embodiment.

[0040] REFERENCE NUMERALS:

[0041] 10, power conversion module; 110, first voltage conversion circuit; 120, second voltage conversion circuit; 130, power protection circuit; 140, rectifier filter circuit; 20, load driving module; 210, first driving circuit; 220, second driving circuit; 30, switching control module; 40, input power; 50, light assembly; 510, first light emitting component; 520, second light emitting component;

[0042] C1, first capacitor; C2, second capacitor; C3, third capacitor; C4, fourth capacitor; C5, fifth capacitor; C6, sixth capacitor; C7, seventh capacitor; C8, eighth capacitor; C9, ninth capacitor; R1, first resistor; R2, second resistor; R3, third resistor; R4, fourth resistor; R5, fifth resistor; R6, sixth resistor; R7, seventh resistor; R8, eighth resistor; R9, ninth resistor; R10, tenth resistor; R11, eleventh resistor; R12, twelfth resistor; D1, first diode; D2, second diode; D3, third diode; L1, first inductor; Q1, first switch tube; Q2, first triode; TR1, bidirectional thyristor; U1, power supply chip; U2, voltage stabilizing chip; U3, driving chip; U4, control chip. DETAILED DESCRIPTION

[0043] In order to make the personnel in the technical field better understand the scheme of the present application, the technical scheme in the embodiments of the present application will be clearly and completely described below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by the person of ordinary skill in the art without making creative labor should belong to the protection scope of the present application.

[0044] It should be noted that the terms "first", "second" and the like in the specification and claims of the present application and the above-described drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or a chronological sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented. In addition, the terms "comprise" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device comprising a series of steps or units does not necessarily limit to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0045] In addition, the meaning of the term "a plurality of" should be two and more than two.

[0046] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0047] In one embodiment, as Figure 1As shown, a light control circuit is provided, which includes a power conversion module 10, a load driving module 20 and a switching control module 30. The power conversion module 10 is configured to connect an input power source 40. The power conversion module 10 is further configured to connect a light assembly 50 to supply power to the light assembly 50. The light assembly 50 includes at least two light emitting components. The load driving module 20 is connected to the power conversion module 10 and the light assembly 50. The switching control module 30 is connected to the power conversion module 10 and the load driving module 20. The switching control module 30 is configured to control the load driving module 20 to switch the corresponding light emitting components to emit light according to the on-off of the input power source 40.

[0048] The input power source 40 can be an AC power source of 120V. The input power source 40 can be connected to an operation switch. A user can control the on-off of the operation switch to control the on-off of the input power source 40. The light assembly 50 can include at least two light emitting components. For example, the light assembly 50 can include light emitting components with different brightness and / or different light emitting colors. The light emitting components can be LED elements or energy-saving lamps.

[0049] The power conversion module 10 is configured to convert the AC signal transmitted by the input power source 40 to obtain a signal that can meet the power supply requirements of the light assembly 50, the load driving module 20 and the switching control module 30. For example, the power conversion module 10 converts the AC signal to a DC signal with a corresponding power supply voltage to supply power to the load driving module 20, the switching control module 30 and the corresponding light emitting components. The power conversion module 10 can also process the AC signal of the input power source 40 to obtain a stable AC signal to supply AC power to the corresponding light emitting components, thereby improving the power supply reliability of the circuit.

[0050] The switching control module 30 can be configured to detect the on-off times and the on-off frequency of the input power source 40. For example, the switching control module 30 can detect the on-off times and the on-off frequency of the operation switch by a user to control the load driving module 20 to work according to the detected on-off of the input power source 40, thereby achieving the state control of the light assembly 50. For example, the switching control module 30 can detect the on-off times of the input power source 40 by a counter and detect the on-off frequency of the input power source 40 by a timer.

[0051] The load driving module 20 can be used to switch control the light assembly 50 according to the control of the switch control module 30, and then switch the light-emitting components to emit light, so as to realize the working mode switching of the light assembly 50. For example, one of the light-emitting components is used to provide normal lighting, and the other light-emitting component is used to improve the indication state light-emitting; when the user controls the operation switch to click, the switch control module 30 can control the load driving module 20 to perform load switching operation according to the on-off state of the input power supply 40, and then the load driving module 20 controls the light-emitting component corresponding to the normal lighting to emit light, and controls the light-emitting component corresponding to the indication state light-emitting to be turned off, so as to realize the normal lighting required by the user; when the user controls the operation switch to double-click quickly, the switch control module 30 can also control the load driving module 20 to perform load switching operation according to the on-off state of the input power supply 40, and then the load driving module 20 controls the light-emitting component corresponding to the normal lighting to be turned off, and controls the light-emitting component corresponding to the indication state light-emitting to emit light, so as to realize the low-power lighting or indication state display for the user, thereby realizing the light-emitting state switching of the light assembly 50 according to the single click or double-click of the user control operation switch, simplifying the switching circuit structure, and improving the reliability of the circuit control.

[0052] In the above embodiment, the power conversion module 10 is connected to the input power supply 40; the power conversion module 10 is connected to the light assembly 50 to supply power to the light assembly 50; the light assembly 50 includes at least two light-emitting components; the load driving module 20 is connected to the power conversion module 10 and the light assembly 50; the switch control module 30 is connected to the power conversion module 10 and the load driving module 20, and the switch control module 30 is configured to control the load driving module 20 to switch the light-emitting components to emit light according to the on-off state of the input power supply 40, so as to realize the accurate switching control of the corresponding light-emitting components in the light assembly 50. The input power supply 40 is converted by the power conversion module 10, and the power conversion module 10 supplies power to the light assembly 50, the load driving module 20 and the switch control module 30 to meet the power supply requirements of the light assembly 50, the load driving module 20 and the switch control module 30. The switch control module 30 controls the load driving module 20 to work according to the on-off state of the input power supply 40, and then the load driving module 20 switches the corresponding light-emitting components in the light assembly 50 to emit light, so as to realize the accurate switching control of the light-emitting components in the light assembly 50, thereby reducing the error of the light state switching, improving the accuracy of the light switching, and improving the reliability of the circuit control.

[0053] In one embodiment, as Figure 2As shown, the power conversion module 10 includes a first voltage conversion circuit 110 and a second voltage conversion circuit 120; the light assembly 50 includes a first light emitting component 510 and a second light emitting component 520; an input end of the first voltage conversion circuit 110 is configured to be connected to the input power source 40, an output end of the first voltage conversion circuit 110 is connected to an input end of the second voltage conversion circuit 120 and the first light emitting component 510; an output end of the second voltage conversion circuit 120 is connected to the switching control module 30 and the load driving module 20, and the second light emitting component 520 is connected to the input power source 40.

[0054] The first voltage conversion circuit 110 can be configured to perform voltage reduction and rectification on the AC signal of the input power source 40, and then obtain a stable DC signal. For example, the first voltage conversion circuit 110 performs voltage reduction and rectification on the input 120V AC signal, and then obtains a stable 12V DC signal, which can be used to supply power to the corresponding light emitting component.

[0055] The second voltage conversion circuit 120 is configured to perform voltage reduction on the DC signal output by the first voltage conversion circuit 110, and then obtain a DC signal that meets the power supply requirements of the switching control module 30 and the load driving module 20. For example, the second voltage conversion circuit 120 performs voltage reduction on the 12V DC signal, and then obtains a stable 5V DC signal, which can be used to supply power to the corresponding switching control module 30 and load driving module 20.

[0056] The first light emitting component 510 can be a night light, and the second light emitting component 520 can be a main light. The luminous intensity of the second light emitting component 520 is greater than that of the first light emitting component 510, i.e., the output power of the second light emitting component 520 is greater than that of the first light emitting component 510. The first light emitting component 510 and the second light emitting component 520 can be LED elements. The first light emitting component 510 is powered by the first voltage conversion circuit 110, and the second light emitting component 520 is powered by the input power source 40.

[0057] In one example, as shown in FIG. 1, the power conversion module 10 includes a first voltage conversion circuit 110 and a second voltage conversion circuit 120; the light assembly 50 includes a first light emitting component 510 and a second light emitting component 520; an input end of the first voltage conversion circuit 110 is configured to be connected to the input power source 40, an output end of the first voltage conversion circuit 110 is connected to an input end of the second voltage conversion circuit 120 and the first light emitting component 510; an output end of the second voltage conversion circuit 120 is connected to the switching control module 30 and the load driving module 20, and the second light emitting component 520 is connected to the input power source 40. Figure 5As shown, the first voltage conversion circuit 110 includes a power supply chip U1, a first capacitor C1, a second capacitor C2, a third capacitor C3, a first resistor R1, a second resistor R2, a third resistor R3, a first diode D1, a second diode D2 and a first inductor L1; the first pin of the power supply chip U1 is connected to the first end of the first capacitor C1 and the cathode of the first diode D1 respectively, the second end of the first capacitor C1 is connected to the cathode of the second diode D2, the anode of the second diode D2 is connected to the ground wire, the anode of the first diode D1 is connected to the first end of the first resistor R1, and the second end of the first resistor R1 is connected to the ground wire; the second pin of the power supply chip U1 is connected to the second end of the first capacitor C1, the third pin of the power supply chip U1 is connected to the first end of the second capacitor C2, and the second end of the second capacitor C2 is connected to the second end of the first capacitor C1; the fourth pin of the power supply chip U1 is connected to the first end of the second resistor R2 and the first end of the third resistor R3 respectively, the second end of the second resistor R2 is connected to the second end of the first capacitor C1, and the second end of the third resistor R3 is connected to the second end of the first capacitor C1; the fifth pin, the sixth pin, the seventh pin and the eighth pin of the power supply chip U1 are connected to the positive electrode of the third capacitor C3 respectively, and the negative electrode of the third capacitor C3 is connected to the ground wire; the first end of the first inductor L1 is connected to the second end of the first capacitor C1, and the second end of the first inductor L1 is connected to the first end of the first resistor R1.

[0058] Among them, the 120V alternating current signal transmitted by the input power supply 40 is input to the power supply chip U1, the power supply chip U1 carries out voltage reduction and rectification processing on the 120V alternating current signal, and obtains a stable 12V direct current signal, which can further supply power to the first light emitting component 510.

[0059] In one example, as shown in Figure 5 The second voltage conversion circuit 120 includes a voltage stabilizing chip U2, a fourth capacitor C4, a fifth capacitor C5, a sixth capacitor C6, a seventh capacitor C7, an eighth capacitor C8, a fourth resistor R4 and a third diode D3; the input pin of the voltage stabilizing chip U2 is connected to the first end of the fourth capacitor C4, the positive electrode of the fifth capacitor C5 and the first end of the fourth resistor R4 respectively, the second end of the fourth capacitor C4 is connected to the ground wire, the negative electrode of the fifth capacitor C5 is connected to the ground wire, the second end of the fourth resistor R4 is connected to the cathode of the third diode D3, the anode of the third diode D3 is connected to the positive electrode of the sixth capacitor C6, and the negative electrode of the sixth capacitor C6 is connected to the ground wire; the output pin of the voltage stabilizing chip U2 is connected to the first end of the seventh capacitor C7 and the first end of the eighth capacitor C8 respectively, the second end of the seventh capacitor C7 is connected to the ground wire, and the second end of the eighth capacitor C8 is connected to the ground wire; the ground pin of the voltage stabilizing chip U2 is connected to the ground wire.

[0060] The 12V direct current signal output by the first voltage conversion circuit 110 is transmitted to the voltage stabilizing chip U2, and the voltage stabilizing chip U2 performs voltage reduction on the 12V direct current signal to obtain a stable 5V direct current signal, which can be used to supply power to the corresponding switching control module 30 and load driving module 20.

[0061] In one embodiment, as shown in FIG. 1, the power supply conversion module 10 further comprises a power protection circuit 130 and a rectification filtering circuit 140; the input end of the power protection circuit 130 is connected to the input power supply 40, the output end of the power protection circuit 130 is connected to the input end of the rectification filtering circuit 140 and the second light-emitting component 520; and the output end of the rectification filtering circuit 140 is connected to the first voltage conversion circuit 110. Figure 3

[0062] The rectification filtering circuit 140 can comprise a rectification module and a filtering module. The rectification module can be a bridge rectifier, for example, the rectification module can be a full-bridge rectifier. The rectification module is used to perform rectification on the alternating current signal transmitted by the input power supply 40, and then output a direct current signal. The filtering module is used to perform filtering on the direct current signal output by the rectification module, and then obtain a filtered direct current signal, thereby improving the reliability of the power supply signal. For example, the rectification filtering circuit 140 comprises a bridge rectifier, a second inductor and a tenth capacitor; the first end of the second inductor is connected to the first voltage conversion circuit 110, the second end of the second inductor is respectively connected to the positive electrode of the tenth capacitor and the bridge rectifier, and the bridge rectifier is respectively connected to the input power supply 40 and the second light-emitting component 520.

[0063] The power protection circuit 130 can be used to protect the input power supply 40 from overvoltage and overcurrent. For example, the power protection circuit 130 comprises a fuse and a fuse; the first end of the fuse is connected to the input power supply 40, the second end of the fuse is connected to the first end of the fuse, and the second end of the fuse is connected to the bridge rectifier.

[0064] In the above embodiment, by arranging the power protection circuit 130 and the rectification filtering circuit 140 in front of the first voltage conversion circuit 110, the safety and reliability of the power supply can be improved.

[0065] In one embodiment, as shown in FIG. 1, the load driving module 20 comprises a first driving circuit 210 and a second driving circuit 220; the first driving circuit 210 is connected between the switching control module 30 and the first light-emitting component 510, and the second driving circuit 220 is connected between the switching control module 30 and the second light-emitting component 520. Figure 4

[0066] ​​The first driving circuit 210 is configured to control the on-off of the first light-emitting component 510, and the second driving circuit 220 is configured to control the on-off of the second light-emitting component 520, so as to realize the state switching of the first light-emitting component 510 and the second light-emitting component 520.

[0067] For example, when the user controls the operation switch to be single-clicked, the switching control module 30 controls the first driving circuit 210 to be turned off, so as to cut off the current path of the first light-emitting component 510, and then the first light-emitting component 510 is turned off; and controls the second driving circuit 220 to be turned on, so as to turn on the current path of the second light-emitting component 520, and then the second light-emitting component 520 emits light to provide main light illumination, and realizes the switching to the main light mode. When the user controls the operation switch to be double-clicked quickly, the switching control module 30 controls the first driving circuit 210 to be turned on, so as to turn on the current path of the first light-emitting component 510, and then the first light-emitting component 510 emits light; and controls the second driving circuit 220 to be turned off, so as to cut off the current path of the second light-emitting component 520, and then the second light-emitting component 520 is turned off to provide night light illumination, and realizes the switching to the night light mode. Thus, the light-emitting state switching of the light assembly 50 is realized according to the single-click or double-click of the operation switch, the switching circuit structure is simplified, and the reliability of the circuit control is improved.

[0068] In one embodiment, as shown in Figure 5 The first driving circuit 210 includes a first switch tube Q1, a fifth resistor R5 and a sixth resistor R6. The gate of the first switch tube Q1 is connected to the first end of the fifth resistor R5 and the first end of the sixth resistor R6 respectively, the first end of the fifth resistor R5 is connected to the ground wire, and the second end of the sixth resistor R6 is connected to the switching control module 30. The source of the first switch tube Q1 is connected to the ground wire, and the drain of the first switch tube Q1 is connected to the first light-emitting component 510.

[0069] As shown in Figure 5 The second driving circuit 220 includes a driving chip U3, a seventh resistor R7, an eighth resistor R8, a ninth resistor R9 and a bidirectional thyristor TR1. The first pin of the driving chip U3 is connected to the first end of the seventh resistor R7, and the second end of the seventh resistor R7 is connected to the second voltage conversion circuit 120. The second pin of the driving chip U3 is connected to the switching control module 30, the third pin of the driving chip U3 is connected to the first end of the eighth resistor R8 and the first end of the bidirectional thyristor TR1 respectively, the second end of the eighth resistor R8 is connected to the second light-emitting component 520, the second end of the bidirectional thyristor TR1 is connected to the second end of the eighth resistor R8, and the third end of the bidirectional thyristor TR1 is connected to the input end of the power conversion module 10. The fifth pin of the driving chip U3 is connected to the first end of the ninth resistor R9, and the second end of the ninth resistor R9 is connected to the third end of the bidirectional thyristor TR1.

[0070] For example, when the user controls the operation switch to click, the switching control module 30 triggers the drive chip U3, so that the drive chip U3 controls the bidirectional thyristor TR1 to conduct, the second light-emitting component 520 (main light) is connected to the power supply, and then the second light-emitting component 520 lights up to provide normal lighting; at the same time, the switching control module 30 controls the first switch tube Q1 to be turned off, and then the current path of the first light-emitting component 510 (night light) is cut off, and then the first light-emitting component 510 is extinguished.

[0071] When the user controls the operation switch to double-click quickly, the switching control module 30 sends a stop trigger signal to the drive chip U3, so that the drive chip U3 stops triggering the bidirectional thyristor TR1, and then the bidirectional thyristor TR1 is turned off, and the second light-emitting component 520 (main light) loses the power supply and is extinguished; at the same time, the switching control module 30 controls the first switch tube Q1 to be turned on, and then the current path of the first light-emitting component 510 (night light) is turned on, and the first light-emitting component 510 obtains enough starting voltage to light up, realizing the switching of the light assembly 50 to the night light mode, thereby reducing the error of the light state switching, improving the accuracy of the light switching, and improving the reliability of the circuit control.

[0072] In one embodiment, as shown in Figure 5 The switching control module 30 includes a control chip U4, a first triode Q2, a tenth resistor R10, an eleventh resistor R11, a twelfth resistor R12, and a ninth capacitor C9; the first pin of the control chip U4 is connected to the second voltage conversion circuit 120; the second pin of the control chip U4 is connected to the collector of the first triode Q2, the emitter of the first triode Q2 is connected to the ground wire, the base of the first triode Q2 is connected to the first end of the tenth resistor R10, the second end of the tenth resistor R10 is respectively connected to the first end of the eleventh resistor R11 and the first end of the twelfth resistor R12, the second end of the eleventh resistor R11 is connected to the input end of the power conversion module 10, the second end of the twelfth resistor R12 is connected to the ground wire, the first end of the ninth capacitor C9 is connected to the second end of the tenth resistor R10, and the second end of the ninth capacitor C9 is connected to the ground wire; the third pin of the control chip U4 is connected to the ground wire, and the fourth pin and the fifth pin of the control chip U4 are respectively connected to the load driving module 20.

[0073] The control chip U4 is used to detect the on-off state of the input power supply 40, that is, detect the on-off state of the user control operation switch. For example, the control chip U4 can record the number of on-off times of the operation switch within a preset time, so as to realize the identification of single click or fast double click switch operation. Then, the control chip U4 can control the on-off of the first driving circuit 210 and the second driving circuit 220 according to the single click switch operation, so as to realize the precise state switching control of the first light emitting component 510 and the second light emitting component 520, thereby meeting the switching demand of the user for the main light and the night light mode, improving the precision of light switching, and improving the reliability of circuit control.

[0074] In one embodiment, a lighting device is also provided, which comprises a light assembly and a light control circuit according to any one of the above embodiments; the light control circuit is connected to the light assembly.

[0075] The light assembly can comprise at least two light emitting components, for example, the light assembly can comprise three light emitting components.

[0076] Based on the connection of the light assembly to the power conversion module and the load driving module in the light control circuit, the light assembly comprises at least two light emitting components, the power conversion module is connected to the input power supply, the load driving module is connected to the power conversion module, the switching control module is connected to the power conversion module and the load driving module, the power conversion module is used to supply power to the switching control module, the load driving module and the light assembly, and the switching control module is configured to control the load driving module to switch the corresponding light emitting component to emit light according to the on-off state of the input power supply, thereby realizing the precise switching control of the corresponding light emitting component in the light assembly. The present application converts the input power supply through the power conversion module, and supplies power to the light assembly, the load driving module and the switching control module, so as to meet the power supply requirements of the light assembly, the load driving module and the switching control module. The switching control module controls the load driving module to work according to the on-off state of the input power supply, and then the load driving module switches the corresponding light emitting component in the light assembly to emit light, thereby realizing the precise switching control of each light emitting component in the light assembly, reducing the error of light state switching, improving the precision of light switching, and improving the reliability of the lighting device.

[0077] It should be noted that the lighting device can also comprise a support assembly and other components. The specific lighting device can comprise more components than described in the above embodiments, or combine certain components, or have different component arrangements.

[0078] The technical features of the above-described embodiments can be combined in any manner. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described, but as long as the combinations of the technical features do not exist contradictions, they should be considered as the scope of the present disclosure.

[0079] The above-described embodiments are merely illustrative of several embodiments of the present application, which are described in more detail and in a specific manner, but should not be construed as limiting the scope of the patent. It should be noted that for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A lighting control circuit, characterized in that, include: A power conversion module, wherein the power conversion module is used to connect to an input power source; The power conversion module is also used to connect to the lighting assembly to supply power to the lighting assembly; the lighting assembly includes at least two light-emitting components; A load drive module, wherein the load drive module is connected to the power conversion module and the lighting component; A switching control module is provided, which is connected to the power conversion module and the load drive module. The switching control module is configured to control the load drive module to switch the light-emitting components to emit light according to the on / off state of the input power.

2. The lighting control circuit according to claim 1, characterized in that, The power conversion module includes a first voltage conversion circuit and a second voltage conversion circuit; the lighting assembly includes a first light-emitting component and a second light-emitting component. The input terminal of the first voltage conversion circuit is used to connect to the input power supply, and the output terminal of the first voltage conversion circuit is connected to the input terminal of the second voltage conversion circuit and the first light-emitting component; The output of the second voltage conversion circuit is connected to the switching control module and the load drive module, and the second light-emitting component is connected to the input power supply.

3. The lighting control circuit according to claim 2, characterized in that, The power conversion module also includes a power protection circuit and a rectifier and filter circuit; The input terminal of the power protection circuit is connected to the input power supply, and the output terminal of the power protection circuit is connected to the input terminal of the rectifier and filter circuit and the second light-emitting component. The output of the rectifier filter circuit is connected to the first voltage conversion circuit.

4. The lighting control circuit according to claim 3, characterized in that, The first voltage conversion circuit includes a power chip, a first capacitor, a second capacitor, a third capacitor, a first resistor, a second resistor, a third resistor, a first diode, a second diode, and a first inductor; The first pin of the power chip is connected to the first terminal of the first capacitor and the cathode of the first diode, the second terminal of the first capacitor is connected to the cathode of the second diode, the anode of the second diode is connected to ground, the anode of the first diode is connected to the first terminal of the first resistor, and the second terminal of the first resistor is connected to ground; the second pin of the power chip is connected to the second terminal of the first capacitor, the third pin of the power chip is connected to the first terminal of the second capacitor, and the second terminal of the second capacitor is connected to the second terminal of the first capacitor; the fourth pin of the power chip is connected to the first terminal of the second resistor and the first terminal of the third resistor, the second terminal of the second resistor is connected to the second terminal of the first capacitor, and the second terminal of the third resistor is connected to the second terminal of the first capacitor; the fifth, sixth, seventh, and eighth pins of the power chip are connected to the positive terminal of the third capacitor, and the negative terminal of the third capacitor is connected to ground; The first end of the first inductor is connected to the second end of the first capacitor, and the second end of the first inductor is connected to the first end of the first resistor.

5. The lighting control circuit according to claim 3, characterized in that, The second voltage conversion circuit includes a voltage regulator chip, a fourth capacitor, a fifth capacitor, a sixth capacitor, a seventh capacitor, an eighth capacitor, a fourth resistor, and a third diode; The input pins of the voltage regulator chip are respectively connected to the first terminal of the fourth capacitor, the positive terminal of the fifth capacitor, and the first terminal of the fourth resistor. The second terminal of the fourth capacitor is connected to the ground wire, the negative terminal of the fifth capacitor is connected to the ground wire, the second terminal of the fourth resistor is connected to the cathode of the third diode, the anode of the third diode is connected to the positive terminal of the sixth capacitor, and the negative terminal of the sixth capacitor is connected to the ground wire. The output pins of the voltage regulator chip are connected to the first terminal of the seventh capacitor and the first terminal of the eighth capacitor, respectively. The second terminal of the seventh capacitor is connected to the ground wire, and the second terminal of the eighth capacitor is connected to the ground wire. The ground pin of the voltage regulator chip is connected to the ground wire.

6. The lighting control circuit according to claim 2, characterized in that, The load driving module includes a first driving circuit and a second driving circuit. The first driving circuit is connected between the switching control module and the first light-emitting component, and the second driving circuit is connected between the switching control module and the second light-emitting component.

7. The lighting control circuit according to claim 6, characterized in that, The first driving circuit includes a first switching transistor, a fifth resistor, and a sixth resistor; The gate of the first switching transistor is connected to the first end of the fifth resistor and the first end of the sixth resistor, respectively. The first end of the fifth resistor is connected to the ground line, and the second end of the sixth resistor is connected to the switching control module. The source of the first switching transistor is connected to the ground line, and the drain of the first switching transistor is connected to the first light-emitting component.

8. The lighting control circuit according to claim 6, characterized in that, The second driving circuit includes a driving chip, a seventh resistor, an eighth resistor, a ninth resistor, and a bidirectional thyristor; The first pin of the driver chip is connected to the first end of the seventh resistor, and the second end of the seventh resistor is connected to the second voltage conversion circuit; The second pin of the driver chip is connected to the switching control module, the third pin of the driver chip is connected to the first end of the eighth resistor and the first end of the bidirectional thyristor, the second end of the eighth resistor is connected to the second light-emitting component, the second end of the bidirectional thyristor is connected to the second end of the eighth resistor, and the third end of the bidirectional thyristor is connected to the input terminal of the power conversion module. The fifth pin of the driver chip is connected to the first end of the ninth resistor, and the second end of the ninth resistor is connected to the third end of the bidirectional thyristor.

9. The lighting control circuit according to any one of claims 2 to 8, characterized in that, The switching control module includes a control chip, a first transistor, a tenth resistor, an eleventh resistor, a twelfth resistor, and a ninth capacitor; The first pin of the control chip is connected to the second voltage conversion circuit; the second pin of the control chip is connected to the collector of the first transistor, the emitter of the first transistor is connected to ground, the base of the first transistor is connected to the first terminal of the tenth resistor, the second terminal of the tenth resistor is connected to the first terminal of the eleventh resistor and the first terminal of the twelfth resistor, the second terminal of the eleventh resistor is connected to the input terminal of the power conversion module, the second terminal of the twelfth resistor is connected to ground, the first terminal of the ninth capacitor is connected to the second terminal of the tenth resistor, and the second terminal of the ninth capacitor is connected to ground. The third pin of the control chip is connected to ground, and the fourth and fifth pins of the control chip are respectively connected to the load drive module.

10. A lighting device, characterized in that, It includes a lighting assembly and a lighting control circuit as described in any one of claims 1 to 9; the lighting control circuit is connected to the lighting assembly.

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