A lighting drive circuit and lamp with power-off delay control function

Abstract

A lighting drive circuit and a lamp with a power-off delay control function, the lighting drive circuit comprising: a power detection component, a power control component, a power management component, a switch component, a light source control component and a standby drive component; when the power detection component is connected to a power supply device, the power control component converts a first power signal output by the power supply device, charges the power management component and drives a first light-emitting module to emit light; the switch component generates a first dial signal, a second dial signal or a third dial signal; the light source control component converts and outputs a power-off signal, a second dial signal or a third dial signal output by the power detection component respectively; the standby drive component controls the second light-emitting module to present different power-off delay light-emitting states according to the signal output by the light source control component; this embodiment adjusts the light-emitting state of the second light-emitting module after the power supply device is powered off through each dial signal output by the switch component, which is simple and practical.

Description

Technical Field

[0001] The present application belongs to the technical field of electronic circuits, and in particular, relates to a lighting drive circuit and a lamp with a power-off delay control function. Background Art

[0002] With the rapid development of electronic technology, daily electronic devices have gradually evolved from single circuit functions to complex and comprehensive circuit functions. Electronic devices have various control methods to meet the various needs of users. The application scope and practical value of electronic devices are also getting higher and higher, bringing users a good use experience. Taking lamps as an example, the original lamps were only used as light sources to bring lighting to people. In modern industrial society, lamps are gradually used in landscape decoration, emergency lighting and other places. Therefore, lamps are gradually extending and developing in different industrial directions.

[0003] If lamps in traditional technology want to expand other circuit functions, such as emergency lighting, then traditional lamps need to add additional emergency circuits and light source chips, etc. The circuits are relatively complex, the operation steps, and the control costs of emergency lighting are high; and when lamps in traditional technology are used for power outage lighting, the light source emitted by the lamps cannot be adaptively adjusted according to the actual needs of the user, which brings great inconvenience to the user and reduces the user experience. Summary of the invention

[0004] In view of this, the embodiments of the present application provide a lighting driving circuit and a lamp with a power-off delay control function, aiming to solve the problems in traditional technical solutions that the control cost of the lighting of the lamp after power off is high, the circuit structure is relatively complex, and the control flexibility of the light source emitted by the lamp after the power-off delay is low, which brings great inconvenience to users.

[0005] A first aspect of an embodiment of the present application provides a lighting driving circuit with a power-off delay control function, comprising:

[0006] A power detection component configured to detect whether a power supply device is connected, and if so, receive a first power signal output by the power supply device;

[0007] connected to the power detection component and the first light-emitting module, and configured to convert the first power signal to obtain a second power signal and a third power signal, and output the second power signal to the power control component of the first light-emitting module;

[0008] a power management component connected to the power control component and configured to charge according to the third power signal;

[0009] A switch component configured to generate a first dial signal, a second dial signal or a third dial signal according to a key signal of a user;

[0010] a light source control component connected to the power detection component, the switch component and the power management component, and configured to generate a first pulse drive signal with a first preset duty cycle according to a power-off signal output by the power detection component, or generate a second pulse drive signal with a second preset duty cycle according to the second dial signal, or generate a third pulse drive signal with a third preset duty cycle according to the third dial signal when detecting that the power detection component is not connected to a power supply device; and

[0011] A standby driving component connected to the light source control component, the power management component and the second light-emitting module, and configured to adjust the discharge electric energy of the power management component according to the first pulse driving signal to generate a first light source driving signal, and control the second light-emitting module to emit a light source within a first preset time period; or adjust the discharge electric energy of the power management component according to the second pulse driving signal to generate a second light source driving signal, and control the second light-emitting module to emit a light source; or adjust the discharge electric energy of the power management component according to the third pulse driving signal to generate a third light source driving signal, and control the second light-emitting module to emit a light source.

[0012] In one embodiment, the power control component includes:

[0013] A power conversion chip, a first switch, a rectifier bridge, a first inductor, a first transformer, a first diode, a second diode, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a first capacitor, a second capacitor, a third capacitor and a fourth capacitor;

[0014] Wherein, the first end of the first switch is the positive input end of the power control component, the second end of the first switch and the first end of the first capacitor are connected to the positive power input end of the rectifier bridge, and the second end of the first capacitor and the negative power input end of the rectifier bridge are connected to form the negative input end of the power control component;

[0015] The positive input terminal of the power control component and the negative input terminal of the power control component are both connected to the power detection component;

[0016] The positive output end of the rectifier bridge and the anode of the first diode are commonly connected to the power detection component, the negative output end of the rectifier bridge, the first end of the second capacitor, the first end of the third capacitor and the first end of the second resistor are commonly connected to the power input pin of the power conversion chip, and the second end of the second resistor is connected to the enable control pin of the power conversion chip;

[0017] The cathode of the first diode, the second end of the second capacitor and the first end of the first resistor are connected to the first end of the first inductor, the second end of the first inductor, the second end of the first resistor, the second end of the third capacitor, the power feedback pin of the power conversion chip, the cathode of the second diode, the first end of the fourth capacitor and the first end of the fifth resistor are connected to form the power forward output end of the power control component;

[0018] The power output pin of the power conversion chip is connected to one end of the primary winding of the first transformer, the other end of the primary winding of the first transformer, the second end of the fourth capacitor and the second end of the fifth resistor are connected together to form the negative power output end of the power control component, the first end of the third resistor and the first end of the fourth resistor are connected together to the ground pin of the power conversion chip, and the second end of the third resistor and the second end of the fourth resistor are connected together to the ground;

[0019] The positive output terminal of the power control component and the negative output terminal of the power control component are connected to the first light-emitting module;

[0020] The secondary winding of the first transformer is connected to the power management component.

[0021] In one embodiment, the light source control component includes:

[0022] A light source control chip, a sixth resistor, a seventh resistor, a third diode, a fifth capacitor, a first key switch and a second key switch;

[0023] The signal output pin of the light source control chip is connected to the first end of the sixth resistor, and the second end of the sixth resistor is connected to the standby driving component;

[0024] The ground pin of the light source control chip, the anode of the third diode and the first end of the fifth capacitor are connected to the ground, the cathode of the third diode, the second end of the fifth capacitor and the first end of the seventh resistor are connected to the level detection pin of the light source control chip, and the second end of the seventh resistor is used to connect the power detection component and the switch component;

[0025] The first gear control pin of the light source control chip is connected to the first end of the first key switch, and the second end of the first key switch is grounded;

[0026] The second gear control pin of the light source control chip is connected to the first end of the second key switch, and the second end of the second key switch is grounded;

[0027] The power input pin of the light source control chip is connected to the power management component.

[0028] In one embodiment, the power management component includes:

[0029] An electric energy storage component connected to the light source control component and the backup drive component and configured to perform charging or discharging; and

[0030] An electric energy control component connected to the power control component and the electric energy storage component, and configured to detect the voltage of the electric energy storage component and perform charging protection on the electric energy storage component when the third power supply signal is received; and to detect the voltage of the electric energy storage component and perform discharging protection on the electric energy storage component when the third power supply signal is not received.

[0031] In one embodiment, the power control component includes: a power management chip, an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, a sixth capacitor and a seventh capacitor;

[0032] The electrical energy storage component includes: a battery;

[0033] The first end of the sixth capacitor, the power input pin of the power management chip, the first end of the eighth resistor and the charging control pin of the power management chip are connected to the power control component, the second end of the eighth resistor, the first end of the ninth resistor and the power output negative pin of the power management chip are connected to the first end of the eleventh resistor, and the voltage stabilization control pin of the power management chip is connected to the first end of the tenth resistor;

[0034] The negative electrode of the battery, the second end of the eleventh resistor, the first end of the seventh capacitor, the ground pin of the power management chip, the second end of the tenth resistor, the second end of the ninth resistor and the second end of the sixth capacitor are connected to the ground;

[0035] The power output positive pin of the power management chip, the second end of the seventh capacitor and the positive electrode of the battery are commonly connected to the light source control component and the standby driving component.

[0036] In one embodiment, the backup drive assembly comprises:

[0037] A power driver chip, an eighth capacitor, a ninth capacitor, a twelfth resistor, a fourth diode and a second inductor;

[0038] Wherein, the pulse width control pin of the power driver chip is connected to the light source control component;

[0039] The power input pin of the power driver chip, the first end of the eighth capacitor and the first end of the second inductor are commonly connected to the power management component, and the second end of the second inductor and the anode of the fourth diode are commonly connected to the voltage enable pin of the power driver chip;

[0040] The cathode of the fourth diode, the positive power output pin of the power driver chip and the first end of the ninth capacitor are connected together to form a positive power output end of the backup driver component;

[0041] The power output negative electrode pin of the power driving chip and the first end of the twelfth resistor are connected together to form the negative power output end of the standby driving component;

[0042] The positive power output terminal of the standby driving component and the negative power output terminal of the standby driving component are used to connect to the second light-emitting module;

[0043] The second end of the twelfth resistor, the ground pin of the power driver chip and the second end of the ninth capacitor are connected to the ground.

[0044] In one embodiment, the switch assembly includes: a dip switch;

[0045] The coding switch is specifically used to adjust to the first gear position according to the first key signal and generate the first coding signal; adjust to the second gear position according to the second key signal and generate the second coding signal; adjust to the third gear position according to the third key signal and generate the third coding signal.

[0046] In one embodiment, it also includes:

[0047] A standby control component connected to the standby driving component and configured to generate an on signal or an off signal according to a trigger signal;

[0048] The standby driving component is further used to transmit the first light source driving signal, the second light source driving signal, or the third light source driving signal to the second light emitting module according to the on signal; or to stop working according to the off signal.

[0049] In one embodiment, it also includes:

[0050] An energy detection component connected to the power management component and the light source control component, and configured to detect the supply current of the discharged electric energy of the power management component when the power detection component is not connected to the power supply device and the discharged electric energy of the power management component is output to the backup driving component.

[0051] A second aspect of an embodiment of the present application provides a lamp, including:

[0052] The lighting driving circuit as described above;

[0053] A first light-emitting module and a second light-emitting module, wherein the first light-emitting module and the second light-emitting module are both connected to the lighting driving circuit; and

[0054] The housing is used to package and protect the lighting driving circuit, the first light-emitting module and the second light-emitting module.

[0055] The above-mentioned lighting driving circuit with power-off delay control function can detect whether the power supply device is connected through the power supply detection component to identify whether the power supply device is powered off; when the power supply device is normally connected to the power supply detection component, the first power signal output by the power supply device is converted, and the first light-emitting module is powered, and the power management component can realize the charging function; if a power-off event of the power supply device is detected, different dial signals are output according to the switch component to adjust the light-emitting effect of the second light-emitting module respectively, and then the second light-emitting module is flexibly and simply powered off delay control is performed on the second light-emitting module, meeting the user's various light source lighting needs; thus, this embodiment can still control the light-emitting state of the second light-emitting module in real time through the switch component when the power supply device is disconnected, and the power-off delay control is relatively convenient, which brings great convenience to the user; the lighting driving circuit only needs to realize the adaptive adjustment function of the light-emitting state of the second light-emitting module according to the signal output state of the switch component, which simplifies the circuit module structure of the lighting driving circuit, reduces the light source control cost of the power supply device when it is disconnected, and has high practical value. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0057] Figure 1 A schematic diagram of the structure of a lighting drive circuit with a power-off delay control function provided in one embodiment of the present application;

[0058] Figure 2 A schematic diagram of the circuit structure of a power control component provided in one embodiment of the present application;

[0059] Figure 3 A schematic diagram of the circuit structure of a light source control component provided in one embodiment of the present application;

[0060] Figure 4 A schematic diagram of the structure of a power management component provided in one embodiment of the present application;

[0061] Figure 5 A schematic diagram of the circuit structure of a power management component provided in one embodiment of the present application;

[0062] Figure 6 A schematic diagram of the circuit structure of a backup drive assembly provided in one embodiment of the present application;

[0063] Figure 7 Another structural schematic diagram of a lighting driving circuit with a power-off delay control function provided in one embodiment of the present application;

[0064] Figure 8 A schematic diagram of the structure of a lamp provided in one embodiment of the present application. DETAILED DESCRIPTION

[0065] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0066] See also Figure 1 , a schematic diagram of the structure of a lighting driving circuit 10 with a power-off delay control function provided in an embodiment of the present application, wherein the lighting driving circuit 10 can not only delay power supply and issue power when the external power supply is disconnected, but also can flexibly adjust the display state of the light source after the power-off delay, thereby ensuring the flexibility and simplicity of adjusting the light source after the power-off delay; for ease of explanation, only the parts related to the present embodiment are shown, which are described in detail as follows:

[0067] The lighting driving circuit 10 comprises: a power detection component 101 , a power control component 102 , a power management component 103 , a switch component 104 , a light source control component 105 and a standby driving component 106 .

[0068] The power detection component 101 is configured to detect whether the power device 20 is connected, and when the power device is connected, a first power signal output by the power device is received.

[0069] The power detection component 101 has a power detection function. When the power detection component 101 detects that the power supply device 20 is connected, an electrical connection is established between the power supply device 20 and the lighting drive circuit 10. At this time, the power supply device 20 serves as an external power supply to continuously supply power to the lighting drive circuit 10. When the power detection component 101 detects that the power supply device 20 is not connected, the power supply device 20 and the lighting drive circuit 10 cannot be electrically connected. At this time, the power supply device 20 loses power, and the lighting drive circuit 10 starts the power-off delay power supply function. Therefore, this embodiment uses the power detection component 101 to perform real-time detection of the access status of the power supply device 20 to ensure the power supply flexibility and stability of the lighting drive circuit 10, and the lighting drive circuit 10 has higher light source control simplicity and compatibility.

[0070] The power control component 102 is connected to the power detection component 101 and the first light emitting module 30 , and is configured to convert the first power signal into a second power signal and a third power signal, and output the second power signal to the first light emitting module 30 .

[0071] The power control component 102 is capable of performing real-time conversion on the electric energy output by the power supply device 20 to obtain a second power signal and a third power signal respectively; illustratively, the first power signal is an alternating current, and the power control component 102 performs rectification and voltage stabilization on the first power signal to obtain a second power signal and a third power signal, and the second power signal and the third power signal have different voltages, for example, the voltage of the second power signal is 3.3V, and the voltage of the third power signal is 3V, and the second power signal or the third power signal output by the power control component 102 can respectively realize the power-on functions of different electronic components, thereby ensuring the internal power conversion efficiency and conversion flexibility of the lighting drive circuit 10.

[0072] When the power control component 102 outputs the second power signal to the first light-emitting module 30, the first light-emitting module 30 receives the second power signal and is powered on according to the rated power, thereby ensuring the power-on safety and power-on stability of the first light-emitting module 30, and thus the first light-emitting module 30 can emit a light source with a preset light intensity; on the contrary, when the power supply device 20 is not connected to the power supply detection component 101, the power control component 102 cannot output the second power signal and the third power signal, and the first light-emitting module 30 is in an off state; therefore, when the power supply device 20 is normally connected to the power supply detection component 101, the electric energy output by the power supply device 20 is efficiently converted to ensure the light-emitting safety and light-emitting efficiency of the first light-emitting module 30; then when the power supply device 20 is normally connected, the first light-emitting module 30 can be directly powered by an external power supply, thereby improving the power supply continuity of the first light-emitting module 30 and meeting the actual light source needs of the user.

[0073] The power management component 103 is connected to the power control component 102 and is configured to charge according to the third power signal.

[0074] The third power signal includes electric energy of a specific voltage, and the power management component 103 has an electric energy storage function. The power management component 103 is charged or discharged so that the power management component 103 can input and output electric energy. Therefore, the power management component 103 in this embodiment is efficiently charged according to the third power signal, and the remaining power stored in the power management component 103 will continue to increase to ensure the safety of electric energy storage of the power management component 103. Therefore, when the power supply device 20 is connected to the lighting drive circuit 10, the rated charging function of the power management component 103 is realized after the external power supply is converted by the power control component 102. Then, when the power supply device 20 is connected, the power management component 103 is efficiently charged to prepare for emergency function when the power supply device 20 has an abnormal power failure. Therefore, this embodiment improves the utilization rate of the electric energy output by the power supply device 20 by adding a power management component 103 inside the lighting drive circuit 10, and then storing the electric energy output by the power supply device 20 in real time.

[0075] The switch component 104 is configured to generate a first dial code signal, a second dial code signal or a third dial code signal according to a key signal of a user.

[0076] The switch component 104 has a switch selection function, and the key signal contains the user's function selection information. Therefore, the first dial signal, the second dial signal and the third dial signal output by the switch component 104 respectively contain different circuit control information; the first dial signal, the second dial signal or the third dial signal can respectively drive the lighting drive circuit 10 to enter different light source display modes after power failure, thereby realizing flexible control of the light source of the lighting drive circuit 10; therefore, this embodiment can flexibly adjust the luminous state of the lighting drive circuit 10 when the external power supply is lost through the switch component 104, which is easy to operate and brings great convenience to the user's dimming control process.

[0077] The light source control component 105 is connected to the power detection component 101, the switch component 104 and the power management component 103, and is configured to generate a first pulse drive signal with a first preset duty cycle according to a power-off signal output by the power detection component 101 when it detects that the power detection component 101 is not connected to the power supply device 20, generate a second pulse drive signal with a second preset duty cycle according to a second dial signal, or generate a third pulse drive signal with a third preset duty cycle according to a third dial signal.

[0078] The power management component 103 is used for discharging, and the light source control component 105 is charged by the discharged electric energy of the power management component 103 to ensure that the light source control component 105 realizes stable and safe circuit functions, and the light source control component 105 has high power supply stability.

[0079] In one embodiment, when the switch component 101 outputs the first dial signal according to the key signal, it means that the switch component 101 is in neutral at this time, and the switch component 101 generates a first pulse drive signal with a first preset duty cycle according to the first dial signal and the power-off signal output by the power detection component 101. When the power detection component 101 is not connected to the power supply device 20, it means that an external power-off event occurs in the lighting drive circuit 10, and the power detection component 101 outputs a power-off signal; then the light source control component 105 generates a pulse drive signal with a specific duty cycle, so that the lighting drive circuit 10 automatically enters the power-off delay control state; when the switch component 104 generates a second dial signal or a third dial signal according to the key signal When a code signal is received, it indicates that the lighting driving circuit 10 enters a specific power-off delay control mode respectively; it should be noted that the duty cycle refers to the ratio of the time occupied by the pulse to the total time during a period of continuous working time of the signal; and the duty cycle is one of the important parameters of the signal, and different circuit control functions can be achieved by adjusting the duty cycle of the signal; therefore, in this embodiment, the light source control component 105 efficiently converts the power-off signal output by the power detection component 101 and the dial signal output by the switch component 104 to generate a pulse driving signal with a specific duty cycle, which greatly improves the adjustment accuracy of the lighting driving circuit 10 for the luminous state after power failure, and simplifies the adjustment steps of the lighting driving circuit 10 for the luminous state after power failure.

[0080] Exemplarily, the first preset duty cycle is 15%, the second preset duty cycle is 33%, and the third preset duty cycle is 100%, so that different circuit functions can be realized for electronic components through the first pulse drive signal, the second pulse drive signal and the third pulse drive signal.

[0081] The backup driving component 106 is connected to the light source control component 105, the power management component 103 and the second light-emitting module 40, and is configured to adjust the discharge electric energy of the power management component 103 according to the first pulse driving signal to generate a first light source driving signal, and control the second light-emitting module 40 to emit a light source within a first preset time period; or adjust the discharge electric energy of the power management component 103 according to the second pulse driving signal to generate a second light source driving signal, and control the second light-emitting module 40 to emit a light source; or adjust the discharge electric energy of the power management component 103 according to the third pulse driving signal to generate a third light source driving signal, and control the second light-emitting module 40 to emit a light source.

[0082] Among them, discharge is performed through the power management component 103, and then the standby drive component 106 can access the discharged electric energy in real time; when the power supply device 20 is abnormally powered off, the power management component 103 controls the second light-emitting module 40 to continue to emit light after the power off, so as to achieve the effect of delayed power off; specifically, when the power detection component 101 outputs a power-off signal, and the light source control component 105 outputs a first pulse drive signal to the standby drive component 106, the first pulse drive signal can change the power conversion state of the standby drive component 106, so that the second light-emitting module 40 emits a light source within a specific time period, and then after the power supply device 20 is powered off, the second light-emitting module 40 can still emit light. It is enough to delay lighting for a period of time to achieve the function of emergency lighting; illustratively, when the first preset time period is 2 minutes, the switch component 104 is in a neutral condition, and when the power detection component 101 outputs a power-off signal, the light source control component 105 continuously outputs a first pulse drive signal within 2 minutes according to the power-off signal output by the power detection component 101, and the backup drive component 106 drives the second light-emitting module 40 to emit light within 2 minutes according to the first pulse drive signal, then the second light-emitting module 40 emits a light source with a preset light intensity. Therefore, after the power supply device 20 is disconnected, the backup drive component 106 can still drive the second light-emitting module 40 to delay lighting for 2 minutes, thereby achieving the effect of automatic delayed lighting.

[0083] When the switch component 104 generates the second dial signal or the third dial signal according to the user's key signal, the light source control component 105 enters a specific brightness control mode. When the light source control component 105 outputs the second pulse drive signal or the third pulse drive signal to the standby drive component 106, since the second pulse drive signal and the third pulse drive signal have specific duty cycles respectively, the standby drive component 106 can output the second light source drive signal or the third light source drive signal to the second light-emitting module 40 after adjusting the discharge power of the power management component 103, so that the second light-emitting module 40 emits a light source with different light intensities. The second light-emitting module 40 can achieve flexible dimming control performance after the external power supply is disconnected, and the light brightness of the second light-emitting module 40 can fully meet the user's visual viewing needs; therefore, when the switch component 104 generates the second dial signal or the third dial signal according to the user's function selection information, at this time, the second light-emitting module 40 relies on the power management component after the power supply device 20 is disconnected. The electric energy generated by the discharge of 103 continues to power on the second light-emitting module 40, so that the second light-emitting module 40 emits a light source of a specific light intensity, and the second light-emitting module 40 will not be extinguished until the discharge electric energy of the power management component 103 ends; it should be noted that when a power-off event occurs in the power detection component 101, if the switch component 104 generates a second dial signal or a third dial signal according to the user's key signal, the lighting drive circuit 10 preferentially enters the brightness adjustment mode according to the user's key function. At this time, the standby drive component 106 will generate a second light source drive signal or a third light source drive signal, so that the second light-emitting module 40 has different light brightness during the power-off delay stage; therefore, this embodiment adjusts the switch component 104 to output the second dial signal or the third dial signal, which can control the second light-emitting module 40 to emit light for a long time only by relying on the discharge electric energy of the power management component 103 when the external power is lost, thereby improving the light source adjustment flexibility of the second light-emitting module 40 and meeting the user's diverse dimming control needs.

[0084] exist Figure 1In the structural schematic diagram of the lighting driving circuit 10, the lighting driving circuit 10 has a relatively simplified circuit module structure. On the one hand, when the power supply device 20 is normally connected, the power control component 102 converts the electric energy output by the power supply device 20, and drives the first light-emitting module 30 to emit light normally, and enables the power management component 103 to charge; when the power supply device 20 is disconnected, the delayed lighting function of the second light-emitting module 40 is started, and three different types of dial signals are output respectively through the switch component 104 to change the power conversion state of the standby driving component 106 respectively; when the switch component 104 does not output any one of the second dial signal and the third dial signal, and the power detection component 101 outputs a power-off signal, the second light-emitting module 40 is connected to electric energy within a specific time period and emits a light source of preset brightness to achieve an emergency automatic lighting effect; when the switch component 104 outputs the second dial signal or the third dial signal, the standby driving component 106 is in a pulse with a specific duty cycle Driven by the adjustment signal, the output electric energy with a specific voltage is used to drive the second light-emitting module 40 to continuously emit a light source with a preset brightness, which brings a good visual experience to the user. Therefore, the present embodiment can control the delayed lighting state of the second light-emitting module 40 when the external power supply is lost through the switch component 104, which is convenient to operate and satisfies the user's multi-faceted visual experience. The emergency lighting of the second light-emitting module 40 is maintained by relying on the power stored in the power management component 103, which further simplifies the internal circuit module of the lighting drive circuit 10 and reduces the control cost of the delayed power-off of the lighting drive circuit 10 when the power supply device 20 is disconnected. The lighting drive circuit 10 can adjust the light-emitting state after the power supply device 20 is disconnected according to the use environment and the use time, and has strong compatibility and flexibility. This effectively solves the problem that the traditional technology has low flexibility in controlling the delayed light source of the lamp after power failure, the control steps and circuit structure are relatively complex, and the user's multi-functional power-off delay control requirements cannot be met, resulting in poor user experience.

[0085] As an optional implementation, Figure 2 The circuit structure of the power control component 102 provided in this embodiment is shown in FIG. Figure 2 The power control component 102 includes: a power conversion chip U1, a first switch S1, a rectifier bridge, a first inductor L1, a first transformer T1, a first diode D1, a second diode D2, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a first capacitor C1, a second capacitor C2, a third capacitor C3 and a fourth capacitor C4.

[0086] Among them, the first end of the first switch S1 is the positive input end of the power control component 102, the second end of the first switch S1 and the first end of the first capacitor C1 are connected to the positive power input end of the rectifier bridge, and the second end of the first capacitor C1 and the negative power input end of the rectifier bridge are connected to form the negative input end of the power control component 102.

[0087] The positive input terminal of the power control component 102 and the negative input terminal of the power control component 102 are both connected to the power detection component 101 .

[0088] When the power supply device 20 is connected to the power supply detection component 101, the power control component 102 receives the first power supply signal output by the power supply detection component 101 through the positive input terminal and the negative input terminal, and there is a high power transmission efficiency between the power supply detection component 101 and the power control component 102; wherein the power transmission process between the power supply detection component 101 and the power control component 102 can be controlled by the first switch S1, and only when the first switch S1 is closed can the power control component 102 be connected to the first power supply signal.

[0089] The positive output end of the rectifier bridge and the anode of the first diode D1 are connected to the power detection component 101. When the power detection component 101 detects that the power supply device 20 is connected, the power detection component 101 notifies the power control component 102 of the connection status, so that the power control component 102 can achieve efficient power conversion function; the negative output end of the rectifier bridge, the first end of the second capacitor C2, the first end of the third capacitor C3 and the first end of the second resistor R2 are connected to the power input pin of the power conversion chip U7, and the second end of the second resistor R2 is connected to the enable control pin of the power conversion chip U7; for example, please refer to Figure 2 The power input pin of the power conversion chip U7 is the 4th pin, and the enable control pin of the power conversion chip U7 is the 3rd pin. Then, the power conversion chip U7 is connected to the DC power through the power input pin and the enable control pin to complete the power conversion operation.

[0090] The cathode of the first diode D2, the second end of the second capacitor C2 and the first end of the first resistor R1 are connected to the first end of the first inductor L1, the second end of the first inductor L1, the second end of the first resistor R1, the second end of the third capacitor C3, the power feedback pin of the power conversion chip U1, the cathode of the second diode D2, the first end of the fourth capacitor C4 and the first end of the fifth resistor R5 are connected to form the power forward output end of the power control component 102; please refer to Figure 2 , the power feedback pin of the power conversion chip U1 is pin 1.

[0091] The power output pin of the power conversion chip U1 is connected to one end of the primary winding of the first transformer T1, and the other end of the primary winding of the first transformer T1, the second end of the fourth capacitor C4 and the second end of the fifth resistor R5 are connected together to form the negative power output end of the power control component 102; Figure 2 As shown, the power output pins of the power conversion chip U1 include the 7th pin and the 8th pin.

[0092] The first end of the third resistor R3 and the first end of the fourth resistor R4 are connected to the ground pin of the power conversion chip U1, and the second end of the third resistor R3 and the second end of the fourth resistor R4 are connected to the ground GND. Figure 2 As shown, the ground pin of the power conversion chip U1 is the fifth pin.

[0093] The positive output terminal of the power control component 102 and the negative output terminal of the power control component 102 are connected to the first light-emitting module 30 .

[0094] The secondary winding of the first transformer T1 is connected to the power management component 103 .

[0095] After the power conversion chip U1 converts the first power signal, on the one hand, the second power signal is output to the first light-emitting module 30 through the positive power output end of the power control component 102 and the negative power output end of the power control component 102, so that the first light-emitting module 30 is powered on and emits light; on the other hand, through the coupling isolation between the primary winding and the secondary winding of the first transformer T1, the electric energy is isolated and transmitted, and then the secondary winding is used to charge the power management component 103 in real time, thereby improving the power transmission efficiency between the power control component 102 and the power management component 103, and the power control component 102 has a high power transmission compatibility.

[0096] Exemplarily, the model of the power conversion chip U1 is LM7805 or LM2940. Therefore, the first power signal can be flexibly converted through the power conversion chip U1, thereby simplifying the internal circuit structure of the power control component 102.

[0097] As an optional implementation, Figure 3 The circuit structure of the light source control component 105 provided in this embodiment is shown in FIG. Figure 3 The light source control component 105 includes: a light source control chip U2, a sixth resistor R6, a seventh resistor R7, a third diode D3, a fifth capacitor C5, a first key switch SW1 and a second key switch SW2.

[0098] The signal output pin P1.0 of the light source control chip U2 is connected to the first end of the sixth resistor R6, and the second end of the sixth resistor R6 is connected to the backup driving component 106; the signal output pin P1.0 of the light source control chip U2 can output the first pulse driving signal, the second pulse driving signal or the third pulse driving signal.

[0099] The ground pin of the light source control chip U2, the anode of the third diode D3 and the first end of the fifth capacitor C5 are connected to the ground GND, the cathode of the third diode D3, the second end of the fifth capacitor C5 and the first end of the seventh resistor R7 are connected to the level detection pin P1.5 of the light source control chip U2, and the second end of the seventh resistor R7 is used to connect the power detection component 101 and the switch component 104; the level detection pin P1.5 of the light source control chip U2 can identify whether the power supply device 20 is connected according to the level state of the access signal, and the recognition accuracy of the access status of the power supply device 20 is relatively high; for example, when a power-off event occurs in the power detection component 101, the level detection pin P1.5 of the light source control chip U2 is connected to the power-off signal.

[0100] The first gear control pin P1 - 2 of the light source control chip U2 is connected to a first end of the first key switch SW1 , and a second end of the first key switch SW1 is grounded GND.

[0101] The second gear control pin P1-3 of the light source control chip U2 is connected to the first end of the second key switch SW2, and the second end of the second key switch SW2 is grounded GND; which respectively controls the on or off state of the first key switch SW1 and the second key switch SW2, and can match various dial signals output by the switch component 104 to adjust the light-emitting state of the second light-emitting module 20 in real time.

[0102] The power input pin VDD of the light source control chip U2 is connected to the power management component 103 ; further, the light source control chip U2 is connected to the discharge power of the power management component 103 through the power input pin VDD to achieve the rated power-on function.

[0103] Exemplarily, the light source control chip U2 is a STM32 series single-chip microcomputer chip, and the light source control chip U2 can efficiently convert the power-off signal and the dial signal, thereby ensuring the light control efficiency of the second light-emitting module 20 .

[0104] As an optional implementation, Figure 4 The structure of the power management component 103 provided in this embodiment is shown in FIG. Figure 4The power management component 103 includes: an energy storage component 1031 and an energy control component 1032; the energy storage component 1031 is connected to the light source control component 105 and the backup drive component 106, and is configured to charge or discharge; wherein the energy storage component 1031 pre-stores electric energy so that when the power supply device 20 is disconnected, the light source control component 105 and the backup drive component 106 are charged respectively, so as to achieve a high charging stability for the second light-emitting module 40 when the external power supply is lost.

[0105] The power control component 1032 is connected to the power control component 102 and the power storage component 1031, and is configured to detect the voltage of the power storage component 1031 and perform charging protection on the power storage component 1031 when a third power supply signal is received; and detect the voltage of the power storage component 1031 and perform discharging protection on the power storage component 1031 when no third power supply signal is received.

[0106] The power control component 1032 can control the charging and discharging of the power storage component 1031. When the power supply device 20 is connected to the power supply detection component 101, the power control component 1032 detects that the power storage component 1031 meets the safe charging conditions, and then efficiently charges the power storage component 1031 through the third power supply signal; on the contrary, when the power supply device 20 is disconnected, the power control component 1032 detects whether the power storage component 1031 meets the safe discharge conditions. When it is determined that the power storage component 1031 meets the safe discharge conditions, the power control component 1032 controls the power storage component 1031 to discharge safely to ensure the continuity and stability of the light emission of the second light-emitting module 40.

[0107] Exemplarily, the power control component 1032 performs trickle charging protection, overcharging protection, over-discharging protection, and over-temperature protection on the power storage component 1031, and then the discharged power can be stably output to the light source control component 105 and the backup drive component 106 through the power storage component 1031 to ensure the power-on safety and working stability of the circuit components of the two: for example, when the voltage of the power storage component 1031 is lower than the preset discharge voltage, the discharge is stopped to protect the power storage component 1031; when the voltage of the power storage component 1031 is higher than the preset charging voltage, it is charged according to the third power supply signal; when the voltage of the power storage component 1031 is higher than the preset trickle voltage, trickle charging is performed until the voltage of the power storage component 1031 reaches the maximum charging voltage, and then charging is stopped, thereby realizing the charge and discharge protection of the power storage component 1031, and the lighting drive circuit 10 has a higher power safety inside to provide a more stable power supply to the second light-emitting module 40.

[0108] As an optional implementation, Figure 5 The circuit structure of the power management component 103 provided in this embodiment is shown in FIG. Figure 5 The power control component 1032 includes: a power management chip U3, an eighth resistor R8, a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11, a sixth capacitor C6 and a seventh capacitor C7.

[0109] The electric energy storage component 1031 includes a battery BAT.

[0110] The first end of the sixth capacitor C6, the power input pin of the power management chip U3, the first end of the eighth resistor R8 and the charging control pin of the power management chip U3 are connected to the power control component 102. Figure 5 As shown, the power input pin of the power management chip U3 is the 4th pin, and the charging control pin of the power management chip U3 is the 8th pin. When the power control component 102 outputs the third power signal to the power input pin and the charging control pin of the power management chip U3, the power management chip U3 performs a power-on operation according to the third power signal; the second end of the eighth resistor R8, the first end of the ninth resistor R9 and the power output negative pin of the power management chip U3 are connected to the first end of the eleventh resistor 11, as shown in FIG. Figure 5 As shown, the negative power output pin of the power management chip U3 is the first pin.

[0111] The voltage control pin of the power management chip U3 is connected to the first end of the tenth resistor R10. Figure 5 As shown, the voltage stabilization control pin of the power management chip U3 is the second pin. The voltage stabilization control pin can ensure that the internal power of the power management chip U3 is in a stable state, thereby improving the charging control and discharging control stability of the power management chip U3.

[0112] The negative electrode of the battery BAT, the second end of the eleventh resistor R11, the first end of the seventh capacitor C7, the ground pin of the power management chip U3, the second end of the tenth resistor R10, the second end of the ninth resistor R9 and the second end of the sixth capacitor C6 are connected to the ground GND. Figure 5 , the ground pin of the power management chip U3 is the 3rd pin.

[0113] The positive power output pin of the power management chip U3, the second end of the seventh capacitor C7 and the positive electrode of the battery BAT are connected to the light source control component 105 and the standby driving component 106; Figure 5 The positive power output pin of the power management chip U3 is pin 5.

[0114] Exemplarily, the power management chip U3 is a buck chip or a boost chip, for example, the power management chip U3 is: an SP1596 chip or an LM2596 series chip; a third power signal is accessed through the power management chip U3 to control the battery BAT to store electrical energy, and a stable power control signal is output through the power output negative pin and the power output positive pin of the power management chip U3 to control the battery BAT to charge or discharge. The discharge electrical energy of the battery BAT can be used to maintain flexible light control performance for the second light-emitting module 40 when the external power supply is lost, thereby meeting the actual visual needs of the user; the power management component 103 has higher charging and discharging stability.

[0115] Exemplarily, the battery BAT is a lithium battery; the power management chip U3 can control the charging or discharging of the lithium battery, and use the electric energy stored in the lithium battery to discharge the light source control component 105 and the backup drive component 106 respectively, to ensure the power supply safety of the internal circuit components of the lighting drive circuit 10, so as to maintain the high efficiency and continuity of the power input of the second light-emitting module 40; for example, when the lithium battery voltage is lower than 2.8V, the power management chip U3 stops discharging the lithium battery to protect the lithium battery; when the lithium battery voltage is lower than 3V, the power management chip U3 quickly charges the lithium battery; when the lithium battery voltage is higher than 3V, the power management chip U3 trickle charges the lithium battery until the lithium battery voltage reaches 4.2V, and then stops charging the lithium battery; further, the present embodiment can stop charging the lithium battery by monitoring the temperature of the power management chip U3, so the power management component 103 in the present embodiment has a high charging and discharging safety performance.

[0116] As an optional implementation, Figure 6 The circuit structure of the backup drive assembly 106 provided in this embodiment is shown in FIG. Figure 6 The backup driving component 106 includes: a power driving chip U4, an eighth capacitor C8, a ninth capacitor C9, a twelfth resistor R12, a fourth diode D4 and a second inductor L2.

[0117] Among them, the pulse width control pin of the power driver chip U4 is connected to the light source control component 105, and the pulse width control pin of the power driver chip U4 is used to access the first pulse drive signal, the second pulse drive signal or the third pulse drive signal; Figure 6 As shown, the pulse width control pin of the power driver chip U4 is the 4th pin. The power conversion operation of the power driver chip U4 can be changed by the first pulse drive signal, the second pulse drive signal or the third pulse drive signal, and the power conversion process has a flexible control method.

[0118] The power input pin of the power driver chip U4, the first end of the eighth capacitor C8 and the first end of the second inductor L2 are connected to the power management component 103. Figure 6 As shown, the power input pin of the power driver chip U4 is the 6th pin, and the discharge power is output to the power driver chip U4 through the power management component 103, so that the power driver chip U4 starts the power conversion process; the second end of the second inductor L2 and the anode of the fourth diode D4 are connected to the voltage enable pin of the power driver chip U4, as shown in FIG. Figure 6 As shown, the voltage enable pin of the power driver chip U4 is the first pin, and the voltage enable pin can enable the power driver chip U4 to maintain normal circuit functions.

[0119] The cathode of the fourth diode D4, the positive power output pin of the power driver chip U4 and the first end of the ninth capacitor C9 are connected together to form the positive power output end of the backup driver component 106; Figure 6 As shown, the positive power output pin of the power driver chip U4 is the 5th pin.

[0120] The power output negative electrode pin of the power driver chip U4 and the first end of the twelfth resistor R12 are connected together to form the negative power output terminal of the backup driver component 106. Figure 6 As shown, the negative power output pin of the power driver chip U4 is the third pin.

[0121] The positive power output terminal of the backup driving component 106 and the negative power output terminal of the backup driving component 106 are used to connect the second light-emitting module 40; when the power driving chip U4 converts the discharge power of the power management component 103, the actual light-emitting state of the second light-emitting module 40 is flexibly changed, thereby improving the flexibility of adjusting the light-emitting state of the second light-emitting module 40.

[0122] The second end of the twelfth resistor R12, the ground pin of the power driver chip U4 and the second end of the ninth capacitor C9 are connected to the ground GND; Figure 6 As shown, the ground pin of the power driver chip U4 is the second pin.

[0123] Exemplarily, the model of the power driver chip U4 is: UC3846, KA3511 or SG3525.

[0124] As an optional embodiment, the switch assembly 104 includes: a dip switch; the dip switch is specifically used to adjust to a first gear position according to a first key signal and generate a first dip signal; adjust to a second gear position according to a second key signal and generate a second dip signal; adjust to a third gear position according to a third key signal and generate a third dip signal.

[0125] The dip switch has three gears. By adjusting the dip switch to make the dip switch in different gears, the signal conversion state of the light source control component 105 can be flexibly adjusted. Therefore, the dip switch has a relatively simple control process, so as to flexibly adjust the light-emitting state of the second light-emitting module 20; exemplarily, since the first key signal, the second key signal and the third key signal respectively represent different key information of the user, the dip switch is adjusted to different gears according to the key information of the user. When the power supply device 20 is disconnected, the delayed light-emitting state of the second light-emitting module 20 is changed according to the dip signal output by the dip switch, thereby meeting the user's all-round light source visual needs; therefore, this embodiment can adjust the actual light-emitting state of the second light-emitting module 20 by changing the gear of the switch component 104, and the light-emitting control process of the lighting drive circuit 10 is relatively simplified, which brings greater simplicity and flexibility to the user's delayed light-emitting control process.

[0126] The power supply device 20 is AC power; therefore, the power control component 102 in this embodiment can convert the first power supply signal output by the AC power to drive the first light-emitting module 30 to emit light normally, and stably charge the power management component 103. The power control component 102 has a more precise power conversion function; therefore, the lighting drive circuit 10 in this embodiment is compatible with various different power system environments, and ensures the stability of power conversion, and drives the first light-emitting module 30 and the second light-emitting module 40 to be in the rated light-emitting state respectively, with higher practical value.

[0127] In order to better illustrate the principle of adjusting the light state of the second light-emitting module 40 by the lighting driving circuit 10 in this embodiment, the following is combined with the attached Figure 1 and attached Figure 6 , a specific example is used to illustrate as follows:

[0128] When the code switch is in the first gear, if the mains power is connected, the power control component 102 drives the first light-emitting module 30 to light up, and charges the power management component 103 through the secondary winding of the first transformer T2.

[0129] When the light source control component 105 detects that the AC power is disconnected and the level detection pin P1.5 of the light source control chip U2 detects a falling edge from 3.3V to 0V, the first gear control pin P1-2 of the light source control chip U2 and the second gear control pin P1.3 of the light source control chip U2 are in any state, and the signal output pin P1.0 of the light source control chip U2 outputs a first pulse drive signal with a positive duty cycle of 15% for 2 minutes, controlling the second light-emitting module 40 to light up.

[0130] When the light source control component 105 detects that the AC power is disconnected and the dip switch is in the second position, under the condition of no AC power input, that is, the level detection pin P1.5 of the light source control chip U2 does not detect the high level of the 3.3V voltage, thereafter, if the level detection pin P1.5 of the light source control chip U2 detects the falling edge from 3.3V to 0V (that is, the first push switch SW1 is closed), the signal output pin P1.0 of the light source control chip U2 outputs a second pulse drive signal with a positive duty cycle of 33% to control the second light-emitting module 40 to delay light emission.

[0131] When the light source control component 105 detects that the AC power is disconnected and the DIP switch is in gear 3, if the level detection pin P1.5 of the light source control chip U2 detects the falling edge from 3.3V to 0V (that is, the second push switch SW2 is closed), the duty cycle of the third pulse drive signal output by the signal output pin P1.0 of the light source control chip U2 is 100%, so as to control the second light-emitting module 40 to emit a light source of a preset intensity.

[0132] Therefore, this embodiment can control the signal conversion state of the light source control component 105 in real time by changing the gear position of the dip switch, and then when the power supply device 20 is disconnected, the second light-emitting module 20 can present different delayed light-emitting performances. The lighting drive circuit 10 has a relatively simple light source control process, which brings a good user experience.

[0133] As an optional implementation, Figure 7 Another structural schematic diagram of the lighting driving circuit 10 provided in this embodiment is shown. Figure 1 The structure of the lighting driving circuit 10 is shown in FIG. Figure 7 The lighting driving circuit 10 further includes: a backup control component 107 and an electric energy detection component 108, wherein the backup control component 107 is connected to the backup driving component 106 and is configured to generate an on signal or an off signal according to a trigger signal.

[0134] The trigger signal includes circuit control information, and the backup control component 107 can perform signal conversion, and can output an on signal or an off signal through the backup control component 107; according to the on signal or the off signal, the backup drive component 106 can be in different signal transmission states.

[0135] The standby driving component 106 is further used to transmit the first light source driving signal, the second light source driving signal, or the third light source driving signal to the second light emitting module 40 according to the on signal; or to stop working according to the off signal.

[0136] Exemplarily, the backup driving component 106 does not output the first light source driving signal, the second light source driving signal or the third light source driving signal to the second light-emitting module 40 according to the shutdown signal, and the second light-emitting module 40 loses power and stops emitting light. Then, the second light-emitting module 40 has a higher flexibility in light adjustment.

[0137] According to the on-signal, the standby drive component 106 can be in a stable signal transmission state, and according to the off-signal, the standby drive component 106 can be in a stopped state. Therefore, the standby drive component 106 in this embodiment has high control flexibility and simplicity; therefore, when the power supply device 20 is disconnected, the standby drive component 106 converts the discharge power of the power management component 103 according to the various pulse drive signals output by the light source control component 105; the power input state of the second light-emitting module 40 can be changed in real time according to the on-signal or the off-signal; for example, when the second light-emitting module 40 is connected When the first light source driving signal, the second light source driving signal or the third light source driving signal is input, the second light-emitting module 40 is in a delayed light-emitting state; when the second light-emitting module 40 cannot be connected to the first light source driving signal, the second light source driving signal and the third light source driving signal, the second light-emitting module 40 is in an off state; therefore, this embodiment can flexibly change the delayed light-emitting state of the second light-emitting module 40 through the backup control component 107, thereby improving the light-emitting adjustment flexibility of the second light-emitting module 40, and the lighting driving circuit 10 has a higher scope of application, which brings a good light-emitting control experience to users.

[0138] The power detection component 108 is connected to the power management component 103 and the light source control component 105, and is configured to detect the supply current of the discharge power of the power management component 103 when the power supply device 20 is not connected to the power detection component 101 and the discharge power of the power management component 103 is output to the backup drive component 106.

[0139] When the power supply device 20 is disconnected, the power conversion state of the standby drive component 106 can be changed through the light source control component 105, so that the standby drive component 106 can adjust the discharge power of the power management component 103 and drive the second light-emitting module 40 to emit light; the power detection component 108 in this embodiment has a current detection function. When the power management component 103 supplies power to the standby drive component 106 through the discharge power, the power detection component 108 can detect the current of the discharge power to obtain the actual power input state of the standby drive component 106, and then the discharge power of the power management component 103 can continuously and safely supply power to the second light-emitting module 40 to ensure that the second light-emitting module 40's luminous stability and power access safety; for example, after the power detection component 108 detects the supply current of the discharged power of the power management component 103, the power management component 103 can be prevented from being in a state of under-current discharge or over-current discharge; therefore, according to the supply current detection result of the power detection component 108, the power input safety of the backup drive component 106 can be more safely guaranteed. Therefore, the backup drive component 106 efficiently converts the discharged power of the power management component 103 according to various pulse drive signals to accurately adjust the luminous state of the second light-emitting module 40. The power input state of the second light-emitting module 40 has flexible adjustable performance, and the lighting drive circuit 10 has a high range of application and safety performance.

[0140] Figure 8 The structure of the lamp 80 provided in this embodiment is shown in FIG. Figure 8 The lamp 80 includes: the lighting drive circuit 10 as described above, the first light-emitting module 801, the second light-emitting module 802 and the shell 803; the first light-emitting module 801 and the second light-emitting module 802 are both connected to the lighting drive circuit 10, and the lighting drive circuit 10 can adjust the actual light-emitting states of the first light-emitting module 801 and the second light-emitting module 802 in real time, so that the actual light-emitting state of the lamp 80 can meet the actual viewing needs of the user; and when the lamp 80 loses external power, the lighting drive circuit 10 can still delay the power supply control of the second light-emitting module 802, so that when the external power is disconnected, the second light-emitting module 802 can adjust the light-emitting state of the second light-emitting module 802 under the power-off condition according to the actual visual function needs of the user, thereby ensuring the flexibility and stability of the light source adjustment of the second light-emitting module 802.

[0141] Optionally, the first light-emitting module 801 and the second light-emitting module 802 both include blue lamp beads, red lamp beads, and at least any one of red lamp beads; for example, the actual light source display state of the second light-emitting module 802 during the power-off delay process can be changed in real time through the lighting driving circuit 10, and the second light-emitting module 802 can emit light sources of various colors to meet the actual visual needs of the user. The second light-emitting module 802 can be flexibly dimmed through the lighting driving circuit 10.

[0142] The shell 803 is used to encapsulate and protect the lighting drive circuit 10, the first light-emitting module 801 and the second light-emitting module 802; optionally, the shell 803 is a plastic shell, and the shell 803 can respectively provide safe physical protection for the lighting drive circuit 10, the first light-emitting module 801 and the second light-emitting module 802 to prevent the first light-emitting module 801 and the second light-emitting module 802 from being subjected to external physical impact or physical interference; for example, the first light-emitting module 801 can be splash-proofed by the shell 803, and the first light-emitting module 801 can be in a safe and stable light-emitting state. The lighting drive circuit 10 can change the light-emitting state of the second light-emitting module 802 in real time and flexibly when the external power supply is lost, thereby improving the compatibility and applicability of the lamp 80 and providing a better user experience.

[0143] Combined with Figure 1 To Attachment Figure 7 In the embodiment, the lamp 80 in this embodiment has a relatively simplified and integrated circuit module structure. The lighting driving circuit 10 can delay the power supply to the second light-emitting module 802 under the condition of losing external power supply, and the lighting driving circuit 10 can flexibly adjust the light-emitting state of the second light-emitting module 802 during the delayed power supply process, thereby flexibly adjusting the light-emitting state of the light-emitting module. The lamp 80 has higher practical value and brings greater convenience to users. Therefore, the lamp 80 in this embodiment has lower dimming control cost and simpler dimming control steps, and the user's experience is better. This will have an extremely important role in promoting the development of lighting control in this field and will produce important practical application value. It effectively solves the problem that traditional technology cannot adjust the lighting of the lamp in real time after power failure delay, has low flexibility and compatibility, cannot meet users' various light source adjustment needs, and has low practical value.

[0144] Various embodiments are described herein for various devices, circuits, apparatuses, systems and / or methods. Many specific details are set forth to provide a thorough understanding of the overall structure, function, manufacture and use of the embodiments as described in the specification and shown in the drawings. However, those skilled in the art will appreciate that the embodiments may be implemented without such specific details. In other examples, well-known operations, parts and elements are described in detail so as not to make the embodiments in the specification difficult to understand. Those skilled in the art will appreciate that the embodiments herein and shown are non-limiting examples, and therefore it will be appreciated that the specific structural and functional details disclosed herein may be representative and do not necessarily limit the scope of the embodiments.

[0145] References to "various embodiments", "in an embodiment", "one embodiment", or "an embodiment" throughout the specification, etc., mean that a particular feature, structure, or characteristic described with respect to an embodiment is included in at least one embodiment. Therefore, the appearance of the phrases "in various embodiments", "in some embodiments", "in an embodiment", or "in an embodiment", etc., in appropriate places throughout the specification, do not necessarily refer to the same embodiment. In addition, particular features, structures, or characteristics may be combined in any appropriate manner in one or more embodiments. Therefore, a particular feature, structure, or characteristic shown or described with respect to one embodiment may be combined in whole or in part with features, structures, or characteristics of one or more other embodiments without assuming that such a combination is not an illogical or non-functional limitation. Any directional references (e.g., plus, minus, upper, lower, up, down, left, right, leftward, rightward, top, bottom, above, below, vertical, horizontal, clockwise, and counterclockwise) are used for identification purposes to help the reader understand the present disclosure, and do not create limitations, particularly with respect to the location, orientation, or use of the embodiments.

[0146] Although certain embodiments are described above with a certain degree of detail, those skilled in the art may make many changes to the disclosed embodiments without departing from the scope of the present disclosure. Connection references (e.g., attachment, coupling, connection, etc.) should be interpreted broadly and may include intermediate members between the connection of elements and relative motion between elements. Therefore, connection references do not necessarily imply that two elements are directly connected / coupled and are in a fixed relationship with each other. The use of "for example" throughout the specification should be interpreted broadly and used to provide non-limiting examples of embodiments of the present disclosure, and the present disclosure is not limited to such examples. It is intended that all matters included in the above description or shown in the accompanying drawings should be interpreted as merely illustrative rather than restrictive. Changes in details or structure may be made without departing from the present disclosure.

[0147] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A lighting drive circuit with power-off delay control function, It is characterized in that include: A power detection component configured to detect whether a power supply device is connected, and if so, receive a first power signal output by the power supply device; connected to the power detection component and the first light-emitting module, and configured to convert the first power signal to obtain a second power signal and a third power signal, and output the second power signal to the power control component of the first light-emitting module; a power management component connected to the power control component and configured to charge according to the third power signal; A switch component configured to generate a first dial signal, a second dial signal or a third dial signal according to a key signal of a user; A light source control component connected to the power detection component, the switch component and the power management component, and configured to generate a first pulse drive signal with a first preset duty cycle according to a power-off signal output by the power detection component, or generate a second pulse drive signal with a second preset duty cycle according to the second dial signal, or generate a third pulse drive signal with a third preset duty cycle according to the third dial signal when detecting that the power detection component is not connected to a power supply device; as well as connected to the light source control component, the power management component and the second light-emitting module, and configured to adjust the discharge power of the power management component according to the first pulse drive signal to generate a first light source drive signal, and control the second light-emitting module to emit light within a first preset time period; or adjusting the discharge power of the power management component according to the second pulse drive signal to generate a second light source drive signal, and controlling the second light-emitting module to emit a light source; or adjusting the discharge power of the power management component according to the third pulse drive signal to generate a third light source drive signal, and controlling the second light-emitting module to emit a standby drive component of the light source; A standby control component connected to the standby driving component and configured to generate an on signal or an off signal according to a trigger signal; The standby driving component is further used to transmit the first light source driving signal or the second light source driving signal or the third light source driving signal to the second light emitting module according to the conduction signal; or stop working according to the shutdown signal; An energy detection component connected to the power management component and the light source control component, and configured to detect the supply current of the discharged electric energy of the power management component when the power detection component is not connected to the power supply device and the discharged electric energy of the power management component is output to the backup driving component.

2. The lighting driving circuit according to claim 1, It is characterized in that The power control component comprises: A power conversion chip, a first switch, a rectifier bridge, a first inductor, a first transformer, a first diode, a second diode, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a first capacitor, a second capacitor, a third capacitor and a fourth capacitor; Wherein, the first end of the first switch is the positive input end of the power control component, the second end of the first switch and the first end of the first capacitor are connected to the positive power input end of the rectifier bridge, and the second end of the first capacitor and the negative power input end of the rectifier bridge are connected to form the negative input end of the power control component; The positive input terminal of the power control component and the negative input terminal of the power control component are both connected to the power detection component; The positive output end of the rectifier bridge and the anode of the first diode are commonly connected to the power detection component, the negative output end of the rectifier bridge, the first end of the second capacitor, the first end of the third capacitor and the first end of the second resistor are commonly connected to the power input pin of the power conversion chip, and the second end of the second resistor is connected to the enable control pin of the power conversion chip; The cathode of the first diode, the second end of the second capacitor and the first end of the first resistor are connected to the first end of the first inductor, the second end of the first inductor, the second end of the first resistor, the second end of the third capacitor, the power feedback pin of the power conversion chip, the cathode of the second diode, the first end of the fourth capacitor and the first end of the fifth resistor are connected to form the power forward output end of the power control component; The power output pin of the power conversion chip is connected to one end of the primary winding of the first transformer, the other end of the primary winding of the first transformer, the second end of the fourth capacitor and the second end of the fifth resistor are connected together to form the negative power output end of the power control component, the first end of the third resistor and the first end of the fourth resistor are connected together to the ground pin of the power conversion chip, and the second end of the third resistor and the second end of the fourth resistor are connected together to the ground; The positive output terminal of the power control component and the negative output terminal of the power control component are connected to the first light-emitting module; The secondary winding of the first transformer is connected to the power management component.

3. The lighting driving circuit according to claim 1, It is characterized in that The light source control component comprises: A light source control chip, a sixth resistor, a seventh resistor, a third diode, a fifth capacitor, a first key switch and a second key switch; The signal output pin of the light source control chip is connected to the first end of the sixth resistor, and the second end of the sixth resistor is connected to the standby driving component; The ground pin of the light source control chip, the anode of the third diode and the first end of the fifth capacitor are connected to the ground, the cathode of the third diode, the second end of the fifth capacitor and the first end of the seventh resistor are connected to the level detection pin of the light source control chip, and the second end of the seventh resistor is used to connect the power detection component and the switch component; The first gear control pin of the light source control chip is connected to the first end of the first key switch, and the second end of the first key switch is grounded; The second gear control pin of the light source control chip is connected to the first end of the second key switch, and the second end of the second key switch is grounded; The power input pin of the light source control chip is connected to the power management component.

4. The lighting driving circuit according to claim 1, It is characterized in that The power management component comprises: An electric energy storage component connected to the light source control component and the backup drive component and configured to perform charging or discharging; and An electric energy control component connected to the power control component and the electric energy storage component, and configured to detect the voltage of the electric energy storage component and perform charging protection on the electric energy storage component when the third power supply signal is received; and to detect the voltage of the electric energy storage component and perform discharging protection on the electric energy storage component when the third power supply signal is not received.

5. The lighting driving circuit according to claim 4, It is characterized in that The power control component includes: a power management chip, an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, a sixth capacitor and a seventh capacitor; The electrical energy storage component includes: a battery; The first end of the sixth capacitor, the power input pin of the power management chip, the first end of the eighth resistor and the charging control pin of the power management chip are connected to the power control component, the second end of the eighth resistor, the first end of the ninth resistor and the power output negative pin of the power management chip are connected to the first end of the eleventh resistor, and the voltage stabilization control pin of the power management chip is connected to the first end of the tenth resistor; The negative electrode of the battery, the second end of the eleventh resistor, the first end of the seventh capacitor, the ground pin of the power management chip, the second end of the tenth resistor, the second end of the ninth resistor and the second end of the sixth capacitor are connected to the ground; The power output positive pin of the power management chip, the second end of the seventh capacitor and the positive electrode of the battery are commonly connected to the light source control component and the standby driving component.

6. The lighting driving circuit according to claim 1, It is characterized in that The backup drive assembly comprises: A power driver chip, an eighth capacitor, a ninth capacitor, a twelfth resistor, a fourth diode and a second inductor; Wherein, the pulse width control pin of the power driver chip is connected to the light source control component; The power input pin of the power driver chip, the first end of the eighth capacitor and the first end of the second inductor are commonly connected to the power management component, and the second end of the second inductor and the anode of the fourth diode are commonly connected to the voltage enable pin of the power driver chip; The cathode of the fourth diode, the positive power output pin of the power driver chip and the first end of the ninth capacitor are connected together to form a positive power output end of the backup driver component; The power output negative electrode pin of the power driving chip and the first end of the twelfth resistor are connected together to form the negative power output end of the standby driving component; The positive power output terminal of the standby driving component and the negative power output terminal of the standby driving component are used to connect to the second light-emitting module; The second end of the twelfth resistor, the ground pin of the power driver chip and the second end of the ninth capacitor are connected to the ground.

7. The lighting driving circuit according to claim 1, It is characterized in that The switch assembly comprises: a dip switch; The coding switch is specifically used to adjust to the first gear position according to the first key signal and generate the first coding signal; adjust to the second gear position according to the second key signal and generate the second coding signal; adjust to the third gear position according to the third key signal and generate the third coding signal.

8. A lamp, It is characterized in that include: The lighting driving circuit according to any one of claims 1 to 7; A first light-emitting module and a second light-emitting module, wherein the first light-emitting module and the second light-emitting module are both connected to the lighting driving circuit; as well as The housing is used to package and protect the lighting driving circuit, the first light-emitting module and the second light-emitting module.

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