Time-delay LED illuminating lamp control circuit

Abstract

The utility model discloses a time-delay LED illuminating lamp control circuit, which relates to the technical field of LED control, and comprises a power supply module used for voltage-stabilized power supply; the illumination detection module is used for illumination detection; the sound detection module is connected with the power supply module and is used for sound detection; the delay control module is used for setting delay time and controlling the lighting trigger module to work in a delayed manner when no light exists and sound is detected; the illumination trigger module is used for storing energy, discharging, controlling the LED driving module to carry out illumination work and adjusting the illumination brightness of the LED driving module; and the LED driving module is used for constant-current regulation and illumination work. The time-delay LED illuminating lamp control circuit can control the LED driving module to carry out time-delay illumination work when no light exists and sound is detected, and after time delay is finished, the illumination brightness of the LED driving module is reduced, so that a user can conveniently control the LED driving module to continue illumination in time.

Description

Technical Field

[0001] This utility model relates to the field of LED control technology, specifically a delay LED lighting control circuit. Background Technology

[0002] Due to its numerous advantages such as environmental friendliness, long lifespan, and high photoelectric efficiency, LEDs have seen rapid development in various industries requiring lighting control in recent years. To achieve energy-saving lighting control, sound and light delay control is generally used in places such as corridors. This delay control of LED lighting means that when a sound is detected in low light conditions, the lighting is delayed. However, because the delay duration of the LED lighting cannot be known, users cannot discern how long the LED lighting will take to turn off after it is turned on, and therefore cannot control the LED lights to continue lighting in a timely manner. Therefore, this method needs improvement. Utility Model Content

[0003] This utility model provides a time-delay LED lighting control circuit to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A time-delay LED lighting control circuit includes: a power supply module, a light detection module, a sound detection module, a time-delay control module, a lighting trigger module, and an LED driver module;

[0006] The power module is used to receive DC power and perform voltage regulation and filtering on the DC power, and output the first power and the second power.

[0007] The light detection module is connected to the power module and is used to receive the first electrical energy and perform light detection. When there is no light, it outputs the first control signal.

[0008] A sound detection module, connected to the power module, is used to receive the first electrical energy and perform sound detection, and output a second control signal when sound is detected;

[0009] The delay control module is connected to the light detection module, the sound detection module and the power module. It is used to set the delay time, output a third control signal when receiving the first power and the first control signal and the second control signal, and output the third control signal after a delay when the second control signal is stopped being received.

[0010] The lighting trigger module, connected to the delay control module and the power supply module, is used to provide a fourth control signal and store the input first electrical energy when a third control signal is received, and to release the stored electrical energy when the third control signal is stopped being received.

[0011] The LED driver module is connected to the power supply module and the lighting trigger module. It is used to receive the second electrical energy, and when it receives the fourth control signal, it performs constant current regulation on the second electrical energy and performs lighting operation. When it receives electrical energy released by the lighting trigger module, it reduces the lighting brightness.

[0012] As a further embodiment of this utility model: the power supply module includes a power interface, a first capacitor, a first voltage regulator, a second capacitor, a second voltage regulator, and a fourth capacitor; the sound detection module includes a first resistor, a pickup device, a fifth capacitor, a second resistor, a third resistor, and a first switching transistor;

[0013] Preferably, the first end of the power interface is connected to one end of the first capacitor, the input end of the first voltage regulator, and the input end of the second voltage regulator. The output end of the first voltage regulator is connected to the first end of the second capacitor, one end of the second resistor, and the first end of the third resistor, and is connected through the first resistor to one end of the fifth capacitor and the first end of the pickup device. The other end of the fifth capacitor is connected to the other end of the second resistor and the base of the first switching transistor. The collector of the first switching transistor is connected to the second end of the third resistor and the delay control module. The output end of the second voltage regulator is connected to the first end of the fourth capacitor. The second end of the power interface is connected to the other end of the first capacitor, the ground terminal of the first voltage regulator, the second end of the second capacitor, the ground terminal of the second voltage regulator, the second end of the fourth capacitor, the second end of the pickup device, the emitter of the first switching transistor, and the ground terminal.

[0014] As a further improvement of this utility model: the delay control module includes a fourth resistor, a sixth capacitor, a first timer, and a seventh capacitor;

[0015] Preferably, the eighth terminal of the first timer is connected to the output terminal of the first voltage regulator and is connected to one end of the sixth capacitor, the sixth terminal and the seventh terminal of the first timer through the fourth resistor. The second terminal of the first timer is connected to the second terminal of the third resistor. The other end of the sixth capacitor is connected to the first terminal of the first timer and the ground terminal. The fifth terminal of the first timer is grounded through the seventh capacitor. The fourth terminal of the first timer is connected to the light detection module. The third terminal of the first timer is connected to the lighting trigger module.

[0016] As a further improvement of this utility model: the light detection module includes a ninth resistor, a first phototransistor, a third switching transistor, and a tenth resistor;

[0017] Preferably, one end of the ninth resistor is connected to the output terminal of the first voltage regulator and is connected to the fourth terminal of the first timer and the collector of the third switching transistor through the tenth resistor. The other end of the ninth resistor is connected to the collector of the first phototransistor. The emitter of the first phototransistor is connected to the base of the third switching transistor, and the emitter of the third switching transistor is grounded.

[0018] As a further embodiment of this utility model: the lighting trigger module includes a sixth resistor, a fifth resistor, a second switching transistor, a third capacitor, and a seventh resistor;

[0019] Preferably, the collector of the second switching transistor is connected to the output terminal of the first voltage regulator through a sixth resistor, the base of the second switching transistor is connected to the third terminal of the first timer through a fifth resistor, and the emitter of the second switching transistor is connected to the first terminal of the third capacitor and the LED driver module, and is connected to the second terminal of the third capacitor and ground through a seventh resistor.

[0020] As a further embodiment of this utility model: the LED driving module includes an eighth resistor, a first inductor, a first diode, a first driver, and an LED module;

[0021] Preferably, one end of the eighth resistor is connected to the output terminal of the second voltage regulator, the cathode of the first diode, and the VIN terminal of the first driver; the other end of the eighth resistor is connected to the CSN terminal of the first driver and the first terminal of the LED module; the second terminal of the LED module is connected to the anode of the first diode and the SW terminal of the first driver through the first inductor; the DIM terminal of the first driver is connected to the first terminal of the third capacitor; and the GND terminal of the first driver is grounded.

[0022] Compared with the prior art, the beneficial effects of this utility model are as follows: The delay LED lighting control circuit of this utility model can detect light through a light detection module, detect sound through a sound detection module, and perform constant current and voltage regulation through an LED driver module to provide the power required for lighting. When there is no light and sound is detected, the delay control module, in conjunction with the lighting trigger module, controls the LED driver module to perform delayed lighting. After the delay ends, the lighting trigger module independently controls the LED driver module to perform delayed lighting. As the power stored in the lighting trigger module is consumed, the lighting brightness of the LED driver module will decrease, thereby reminding the user that the lighting will stop soon, allowing the user to control the LED driver module to continue the lighting in a timely manner. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic block diagram of a time-delay LED lighting control circuit provided as an example of the present invention.

[0025] Figure 2A circuit diagram of a time-delay LED lighting control circuit provided for this utility model embodiment.

[0026] Figure 3 A connection circuit diagram of the light detection module provided for this utility model embodiment. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] In one embodiment, see Figure 1 A time-delay LED lighting control circuit includes: a power supply module 1, a light detection module 2, a sound detection module 3, a time delay control module 4, a lighting trigger module 5, and an LED driver module 6.

[0029] Specifically, power module 1 is used to receive DC power and perform voltage regulation and filtering on the DC power, and output first power and second power.

[0030] The light detection module 2 is connected to the power module 1 and is used to receive the first electrical energy and perform light detection. When there is no light, it outputs the first control signal.

[0031] The sound detection module 3 is connected to the power module 1 and is used to receive the first electrical energy and perform sound detection. When sound is detected, it outputs a second control signal.

[0032] The delay control module 4 is connected to the light detection module 2, the sound detection module 3 and the power module 1. It is used to set the delay time, output a third control signal when receiving the first power and the first control signal and the second control signal, and output the third control signal after a delay when the second control signal is stopped being received.

[0033] The lighting trigger module 5 is connected to the delay control module 4 and the power module 1. It is used to provide a fourth control signal and store the input first electrical energy when the third control signal is received, and to release the stored electrical energy when the third control signal is stopped being received.

[0034] The LED driver module 6 is connected to the power supply module 1 and the lighting trigger module 5. It is used to receive the second electrical energy, and when it receives the fourth control signal, it performs constant current regulation on the second electrical energy and performs lighting work. When it receives the electrical energy released by the lighting trigger module 5, it reduces the lighting brightness.

[0035] In a specific embodiment, the power supply module 1 can be a power circuit composed of a power interface, a voltage regulator, and a capacitor, which can receive DC power and perform voltage regulation and filtering on the DC power; the light detection module 2 can be a light detection circuit composed of a resistor, a phototransistor, and a transistor to perform light detection and provide a high-level signal to the delay control module 4 when there is no light; the sound detection module 3 can be a sound detection circuit composed of a pickup device, a resistor, a transistor, etc., to perform sound detection and provide a high-level signal to the delay control module 4 after sound is detected; the delay control module 4 can be a delay control circuit composed of a resistor, a capacitor, and a timer, which can set the delay time. Upon receiving signals from the sound detection module 3 and the light detection module 2, the module outputs a high-level signal. After stopping receiving signals from the sound detection module 3, it outputs a high-level signal after a delay. The lighting trigger module 5 can be a lighting trigger circuit composed of transistors, resistors, and capacitors. It can receive signals from the delay control module 4 and control the operation of the LED driver module 6. It can also store energy and control the brightness of the LED driver module 6 when it stops receiving signals from the delay control module 4. The LED driver module 6 can be an LED driver circuit composed of a constant current driver, LED module, inductor, etc. It performs constant current and voltage regulation on the input electrical energy and performs lighting operation.

[0036] In another embodiment, please refer to Figure 1 , Figure 2 and Figure 3 The power module 1 includes a power interface, a first capacitor C1, a first voltage regulator T1, a second capacitor C2, a second voltage regulator T2, and a fourth capacitor C4; the sound detection module 3 includes a first resistor R1, a pickup device, a fifth capacitor C5, a second resistor R2, a third resistor R3, and a first switching transistor V1.

[0037] Specifically, the first end of the power interface is connected to one end of the first capacitor C1, the input end of the first voltage regulator T1, and the input end of the second voltage regulator T2. The output end of the first voltage regulator T1 is connected to the first end of the second capacitor C2, one end of the second resistor R2, and the first end of the third resistor R3. It is also connected to one end of the fifth capacitor C5 and the first end of the pickup device through the first resistor R1. The other end of the fifth capacitor C5 is connected to the other end of the second resistor R2 and the base of the first switching transistor V1. The collector of the first switching transistor V1 is connected to the second end of the third resistor R3 and the delay control module 4. The output end of the second voltage regulator T2 is connected to the first end of the fourth capacitor C4. The second end of the power interface is connected to the other end of the first capacitor C1, the ground terminal of the first voltage regulator T1, the second end of the second capacitor C2, the ground terminal of the second voltage regulator T2, the second end of the fourth capacitor C4, the second end of the pickup device, the emitter of the first switching transistor V1, and the ground terminal.

[0038] In a specific embodiment, the first voltage regulator T1 and the second voltage regulator T2 can both be LM317 voltage regulators, which can perform voltage regulation; the pickup device can be a CM-18W pickup; and the first switching transistor V1 can be an NPN transistor.

[0039] Furthermore, the delay control module 4 includes a fourth resistor R4, a sixth capacitor C6, a first timer IC1, and a seventh capacitor C7;

[0040] Specifically, the eighth terminal of the first timer IC1 is connected to the output terminal of the first voltage regulator T1 and is connected to one end of the sixth capacitor C6, the sixth terminal and the seventh terminal of the first timer IC1 through the fourth resistor R4. The second terminal of the first timer IC1 is connected to the second terminal of the third resistor R3. The other end of the sixth capacitor C6 is connected to the first terminal of the first timer IC1 and the ground terminal. The fifth terminal of the first timer IC1 is grounded through the seventh capacitor C7. The fourth terminal of the first timer IC1 is connected to the light detection module 2. The third terminal of the first timer IC1 is connected to the lighting trigger module 5.

[0041] In a specific embodiment, the first timer IC1 can be an NE555 timer, which, together with the fourth resistor R4, the sixth capacitor C6 and the seventh capacitor C7, performs delay control.

[0042] Furthermore, the light detection module 2 includes a ninth resistor R9, a first phototransistor J1, a third switch V3, and a tenth resistor R10;

[0043] Specifically, one end of the ninth resistor R9 is connected to the output terminal of the first voltage regulator T1 and is connected to the fourth terminal of the first timer IC1 and the collector of the third switch V3 through the tenth resistor R10. The other end of the ninth resistor R9 is connected to the collector of the first phototransistor J1. The emitter of the first phototransistor J1 is connected to the base of the third switch V3. The emitter of the third switch V3 is grounded.

[0044] In a specific embodiment, the first phototransistor J1 is turned on when light is detected and turned off when there is no light; the third switch V3 can be an NPN type transistor.

[0045] Furthermore, the lighting trigger module 5 includes a sixth resistor R6, a fifth resistor R5, a second switch V2, a third capacitor C3, and a seventh resistor R7;

[0046] Specifically, the collector of the second switch V2 is connected to the output terminal of the first voltage regulator T1 through the sixth resistor R6, the base of the second switch V2 is connected to the third terminal of the first timer IC1 through the fifth resistor R5, and the emitter of the second switch V2 is connected to the first terminal of the third capacitor C3 and the LED driver module 6 through the seventh resistor R7 and connected to the second terminal of the third capacitor C3 and the ground terminal.

[0047] In a specific embodiment, the third capacitor C3 can be a storage capacitor; the second switch V2 can be an NPN transistor.

[0048] Furthermore, the LED driver module 6 includes an eighth resistor R8, a first inductor L1, a first diode D1, a first driver IC2, and an LED module;

[0049] Specifically, one end of the eighth resistor R8 is connected to the output terminal of the second voltage regulator T2, the cathode of the first diode D1, and the VIN terminal of the first driver IC2. The other end of the eighth resistor R8 is connected to the CSN terminal of the first driver IC2 and the first terminal of the LED module. The second terminal of the LED module is connected to the anode of the first diode D1 and the SW terminal of the first driver IC2 through the first inductor L1. The DIM terminal of the first driver IC2 is connected to the first terminal of the third capacitor C3. The GND terminal of the first driver IC2 is grounded.

[0050] In a specific embodiment, the first driver IC2 described above may be a PT4115 constant current driver.

[0051] In this embodiment, a delayed LED lighting control circuit receives DC power through a power interface. A first voltage regulator T1 and a second voltage regulator T2 perform voltage regulation, thereby powering the sound detection module 3, light detection module 2, lighting trigger module 5, delay control module 4, and LED driver module 6. In the absence of light, the first phototransistor J1 is cut off, the third switch V3 is cut off, and the first voltage regulator T1 triggers the fourth terminal of the first timer IC1 to a high level through the tenth resistor R10, thus starting the first timer IC1. After the sound pickup device detects sound, the first switch V1 is cut off, and the first voltage regulator T1 triggers the second terminal of the first timer IC1 to a high level through the third resistor R3. The third terminal of the first timer IC1 outputs a high level, which, in conjunction with the fourth resistor R4, the sixth capacitor C6, and the seventh capacitor... The delay time is set by capacitor C7. After the second terminal of the first timer IC1 goes low, the third terminal of the first timer IC1 outputs a high level after a delay, which then controls the second switch V2 to turn on. The third capacitor C3 stores energy, and the DIM terminal of the first driver IC2 goes high. The first driver IC2, together with the eighth resistor R8, the first diode D1, and the first inductor L1, performs constant current and voltage regulation on the power input to the LED module, and the LED module performs lighting operation. When the delay ends, the second switch V2 turns off, the third capacitor C3 discharges and supplies power to the DIM terminal of the first driver IC2. As the potential of the third capacitor C3 decreases, the current regulated by the first driver IC2 decreases, and the lighting brightness of the LED module decreases until it turns off. This allows the user to know the LED module's off time based on its brightness.

[0052] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0053] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A time-delay LED lighting control circuit, characterized in that, The delay LED lighting control circuit includes: a power supply module, a light detection module, a sound detection module, a delay control module, a lighting trigger module, and an LED driver module; The power module is used to receive DC power and perform voltage regulation and filtering on the DC power, and output first power and second power. The light detection module is connected to the power module and is used to receive the first electrical energy and perform light detection. When there is no light, it outputs the first control signal. The sound detection module is connected to the power module and is used to receive the first electrical energy and perform sound detection. When sound is detected, it outputs a second control signal. The delay control module is connected to the light detection module, the sound detection module and the power module, and is used to set the delay time. When receiving the first power and receiving the first control signal and the second control signal, it outputs the third control signal and outputs the third control signal after a delay when it stops receiving the second control signal. The lighting trigger module is connected to the delay control module and the power supply module. When the third control signal is received, it provides a fourth control signal and stores the first electrical energy input. When the third control signal is stopped being received, it releases the stored electrical energy. The LED driver module is connected to the power supply module and the lighting trigger module. It is used to receive the second electrical energy, and when it receives the fourth control signal, it performs constant current regulation on the second electrical energy and performs lighting operation. When it receives electrical energy released by the lighting trigger module, it reduces the lighting brightness.

2. The delay LED lighting control circuit according to claim 1, characterized in that, The power module includes a power interface, a first capacitor, a first voltage regulator, a second capacitor, a second voltage regulator, and a fourth capacitor; the sound detection module includes a first resistor, a pickup device, a fifth capacitor, a second resistor, a third resistor, and a first switching transistor. The first end of the power interface is connected to one end of the first capacitor, the input end of the first voltage regulator, and the input end of the second voltage regulator. The output end of the first voltage regulator is connected to the first end of the second capacitor, one end of the second resistor, and the first end of the third resistor. It is also connected to one end of the fifth capacitor and the first end of the pickup device through the first resistor. The other end of the fifth capacitor is connected to the other end of the second resistor and the base of the first switching transistor. The collector of the first switching transistor is connected to the second end of the third resistor and the delay control module. The output end of the second voltage regulator is connected to the first end of the fourth capacitor. The second end of the power interface is connected to the other end of the first capacitor, the ground terminal of the first voltage regulator, the second end of the second capacitor, the ground terminal of the second voltage regulator, the second end of the fourth capacitor, the second end of the pickup device, the emitter of the first switching transistor, and the ground terminal.

3. The delay LED lighting control circuit according to claim 2, characterized in that, The delay control module includes a fourth resistor, a sixth capacitor, a first timer, and a seventh capacitor; The eighth terminal of the first timer is connected to the output terminal of the first voltage regulator and is connected to one end of the sixth capacitor, the sixth terminal and the seventh terminal of the first timer through the fourth resistor. The second terminal of the first timer is connected to the second terminal of the third resistor. The other end of the sixth capacitor is connected to the first terminal of the first timer and the ground terminal. The fifth terminal of the first timer is grounded through the seventh capacitor. The fourth terminal of the first timer is connected to the light detection module. The third terminal of the first timer is connected to the lighting trigger module.

4. The delay LED lighting control circuit according to claim 3, characterized in that, The light detection module includes a ninth resistor, a first phototransistor, a third switching transistor, and a tenth resistor; One end of the ninth resistor is connected to the output terminal of the first voltage regulator and is connected to the fourth terminal of the first timer and the collector of the third switching transistor through the tenth resistor. The other end of the ninth resistor is connected to the collector of the first phototransistor. The emitter of the first phototransistor is connected to the base of the third switching transistor, and the emitter of the third switching transistor is grounded.

5. A time-delay LED lighting control circuit according to claim 3, characterized in that, The lighting trigger module includes a sixth resistor, a fifth resistor, a second switching transistor, a third capacitor, and a seventh resistor; The collector of the second switching transistor is connected to the output terminal of the first voltage regulator through the sixth resistor, the base of the second switching transistor is connected to the third terminal of the first timer through the fifth resistor, and the emitter of the second switching transistor is connected to the first terminal of the third capacitor and the LED driver module, and is connected to the second terminal of the third capacitor and the ground terminal through the seventh resistor.

6. The delay LED lighting control circuit according to claim 5, characterized in that, The LED driving module includes an eighth resistor, a first inductor, a first diode, a first driver, and an LED module; One end of the eighth resistor is connected to the output terminal of the second voltage regulator, the cathode of the first diode, and the VIN terminal of the first driver. The other end of the eighth resistor is connected to the CSN terminal of the first driver and the first terminal of the LED module. The second terminal of the LED module is connected to the anode of the first diode and the SW terminal of the first driver through the first inductor. The DIM terminal of the first driver is connected to the first terminal of the third capacitor. The GND terminal of the first driver is grounded.

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