LED control circuit capable of infrared induction

Abstract

The utility model relates to an LED control circuit capable of infrared induction. The LED control circuit comprises a power supply unit and a sensing control unit. The power supply unit is used for supplying power to the sensing control unit; the sensing control unit comprises an infrared distance sensing module, an MCU (Microprogrammed Control Unit) processor and an LED (Light Emitting Diode) driving circuit; the infrared distance sensing module generates a distance signal after sensing an object, the MCU processor is electrically connected with the infrared distance sensing module and processes the distance signal to generate a PWM (Pulse Width Modulation) signal, and the LED driving circuit receives the PWM signal to control the LED lamp. The LED control circuit can perform non-contact control on the LED lamp in an infrared induction gesture mode, so that the LED lamp can be controlled more conveniently and quickly, and meanwhile, sweat stains or oil stains on hands are prevented from corroding equipment after long-time use. Furthermore, the control circuit also supports the functions of Bluetooth and Wifi control and touch control, so as to meet the requirements of various control modes.

Description

TECHNICAL FIELD

[0001] The utility model relates to a LED control technical field, especially a kind of LED control circuit of infrared induction. BACKGROUND

[0002] In recent years, the intelligent degree of electric appliance is higher and higher, in order to adapt to different needs, the way of controlling electric appliance has also changed, especially the remote control method has become the mainstream intelligent electric appliance operation method on the market.

[0003] For LED lamp, the more mainstream remote control method is to control through Wifi, Bluetooth, infrared remote control and other functions. Through the above method, although the remote control of LED lamp is realized, it still needs to use remote controller or other equipment as auxiliary, cannot achieve real contactless control, it is still inconvenient to control LED lamp in some scenes where remote controller is not convenient to use, and it is also accompanied by the problem that long-time contact with product will produce oil stain or sweat stain to corrode product. UTILITY MODEL CONTENT

[0004] Therefore, the utility model aims at providing a kind of LED control circuit of infrared induction, can recognize certain gesture by infrared induction and trigger the control of LED lamp, to facilitate user contactless control LED lamp.

[0005] A kind of LED control circuit of infrared induction, including power supply unit and sensing control unit;The power supply unit is used to power supply sensing control unit;Sensing control unit includes an infrared distance sensing module, an MCU processor and an LED drive circuit;The distance signal is generated after the infrared distance sensing module is sensed to object, the MCU processor is electrically connected with the infrared distance sensing module and the distance signal is handled to generate PWM signal, the LED drive circuit receives the PWM signal control LED lamp.

[0006] Compared with prior art, the LED control circuit of infrared induction of the utility model, can be contactless control to LED lamp by the way of infrared induction gesture, so that the control of LED lamp becomes more convenient and fast, while preventing sweat or oil stain on hand after long-time use corrodes equipment.

[0007] Further, the sensing control unit further includes an infrared receiving module and an infrared remote controller, the infrared remote controller sends control signal to the infrared receiving module, the infrared receiving module transmits the control signal to the MCU processor, and then controls LED lamp.

[0008] Furthermore, the sensor control unit also includes a gong column. When a human body touches the gong column, the gong column transmits a control signal to the MCU processor, thereby realizing touch control.

[0009] Furthermore, the sensor control unit also includes a Bluetooth module, a Wifi module and a remote controller, and the remote controller sends a signal to the MCU processor in the form of a Bluetooth or Wifi connection, thereby controlling the LED light.

[0010] Furthermore, the power supply unit includes a buck step-down circuit, which converts a 24V voltage into a 3.3V voltage.

[0011] Furthermore, the power supply unit outputs a 3.3V voltage to the infrared distance sensing module, the MCU processor and the infrared receiving module.

[0012] Furthermore, the LED driving circuit also includes a transistor, the PWM signal is connected to the base of the transistor, the emitter of the transistor is connected to the LED lamp, the collector of the transistor is grounded, and the MCU processor sends a PWM signal of a certain frequency to control the conduction and shutdown of the transistor, thereby controlling the LED lamp.

[0013] Furthermore, a current limiting resistor is connected in series to the base of the transistor, and a shunt resistor is connected in parallel between the base and the collector of the transistor.

[0014] Furthermore, a current-limiting resistor is connected in series to the circuit that outputs the distance signal from the infrared distance sensing module to the MCU processor to prevent the input current from being too large.

[0015] In order to better understand and implement the present invention, the present invention is described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of an infrared-sensitive LED control circuit;

[0017] Figure 2 This is the connection diagram of Espressif's ESP32 MCU chip;

[0018] Figure 3 This is the circuit diagram of the buck step-down circuit;

[0019] Figure 4 This is the circuit connection diagram of the infrared distance sensor module;

[0020] Figure 5 This is the circuit diagram of the LED drive circuit;

[0021] Figure 6Circuit connection diagram for infrared receiving module;

[0022] Figure 7 Circuit connection diagram for gong column;

[0023] Figure 8 Circuit connection diagram for buzzer; DETAILED DESCRIPTION

[0024] The existing remote control LED lamp driving circuit is usually realized through Wifi, Bluetooth and infrared remote control, etc., and cannot achieve real contactless control. Such design makes the consumer have to hold another remote controller when operating the LED lamp, and long time use will cause sweat and oil stains to corrode the equipment. Moreover, such control mode is very inconvenient for some scenes where it is inconvenient to hold the controller. Therefore, an LED lamp control circuit capable of realizing remote contactless control is urgently needed.

[0025] Therefore, in order to solve the above problems, the utility model designs a kind of LED control circuit of infrared response, so that user can remotely control LED lamp contactlessly by gesture, and also provides Bluetooth, Wifi, infrared remote control and other remote control functions.

[0026] The scheme of the LED control circuit designed by the utility model is described in detail below with reference to the drawings.

[0027] Please refer to Figure 1 The LED control circuit of infrared response of the utility model includes sensing control unit and power supply unit. The power supply unit converts 24V input voltage into 3.3V output voltage to power the sensing control unit, and the sensing control unit can sense target objects and control LED lamp.

[0028] Specifically, the sensing control unit includes an MCU processor, an infrared distance sensing module and an LED driving circuit. The infrared distance sensing module can emit infrared rays outward, and when sensing the object in front, the infrared rays are reflected back and received by the infrared distance sensing module. The infrared distance sensing module measures the distance of the object and transmits it to the MCU processor, and the MCU processor converts the signal into PWM signal input LED driving circuit, to control LED lamp.

[0029] The sensing control unit also includes a Bluetooth module, a Wifi module and a remote controller. User can connect to sensing control unit through Bluetooth and Wifi function of the remote controller to realize communication function. Then remote control signal is sent by the remote controller, and the MCU processor processes the control signal sent by the remote controller and converts it into PWM signal input LED driving circuit to control LED lamp.

[0030] The sensing control unit further comprises an infrared receiving module and an infrared remote controller. A user can remotely send a control signal to the infrared receiving module by operating the infrared remote controller. The MCU processor converts the control signal into a PWM signal after processing the control signal and inputs the PWM signal into the LED driving circuit to control the LED lamp.

[0031] Please refer to Figure 2 Preferably, the MCU processor is an Espressif ESP32 module. The 3V3 interface port of the module is connected to the 3.3V power supply output by the power supply unit and is connected in parallel with two filter capacitors C10 and C11 to the ground terminal. The EN port of the module is connected to the 3V3 power supply through a current-limiting resistor R15 and is grounded through a capacitor C9. The Espressif ESP32 module has functions such as Wifi, Bluetooth, and timing module. The module has multiple input and output pins and can receive multiple control signals, process the signals, and then output a PWM signal of a certain frequency through the output port.

[0032] Preferably, the infrared distance sensing module is a VL53L0X module. The VL53L0X module has an IIC communication interface and can measure objects within 2 meters in front. When an object within 2 meters is detected, the distance of the object distance sensor is transmitted to the Espressif ESP32 module through the IIC interface. The output of the VL53L0X module can be accurate to mm. The traditional infrared distance measurement method cannot measure due to the reflection of the object, but the reflection of the object does not affect the measurement result of the VL53L0X module. The VL53L0X module is installed at a fixed position of the LED lamp, and the control distance can be adjusted according to the installation environment.

[0033] Preferably, the VL53L0X module sends a control signal by sensing the gesture of a person. When the hand is fixed within 2m, the VL53L0X module continuously transmits the distance of the hand to the Espressif ESP32 module. The distance can be adjusted according to the requirements, and the control distance can be changed to 1 meter or 0.5 meters, which is suitable for different installation environments.

[0034] Please refer to Figure 3The power supply unit includes a buck voltage reduction circuit, the voltage reduction circuit includes a DC-DC voltage reduction chip U1, the IN end of the chip is connected to the 24V input power supply and is connected to the ground in parallel with two filter capacitors C5 and C6. The EN end of the voltage reduction chip U1 is connected to the 24V input power supply through a current-limiting resistor R14 and is connected to the ground through a resistor R13. There is a capacitor C1 connected between the BS and LX ends of the voltage reduction chip U1 to ensure that the MOS tube in the voltage reduction chip U1 is continuously turned on. The LX end is also connected to an inductor L1 for ensuring continuous current reduction. The output end of the inductor L1 is connected to feedback resistors R1 and R2, the end of the feedback resistor R1 and the front end of R2 are connected to the feedback output end FB of the voltage reduction chip, and R1 and R2 are used to control the size of the output voltage. In this embodiment, R1 is 100kΩ, R2 is 13kΩ, and the output voltage is 3.3V. The 3.3V output end of the voltage reduction circuit is also connected in parallel with three capacitors C2, C3, and C4, wherein one end of C2 is connected to the ground through a resistor R2, and C3 and C4 are directly connected to the ground.

[0035] Please refer to Figure 4 The power supply unit outputs a 3.3V voltage to the VL53L0X module. The VL53L0X module is connected to the connector CON1, and the two output ends thereof respectively establish IIC signal (SDA and SCL) communication with the IO9 and IO10 ports of the Loongan ESP32 module, and the SDA and SCL signals of the VL53L0X module are also respectively connected in series with resistors R7 and R8 when electrically connected to the Loongan ESP32 module, so as to limit the current and prevent the device from being damaged.

[0036] Please refer to Figure 5 The LED lamp is connected to the connector CON2 of the LED driving circuit, the LED driving circuit includes two triodes Q1 and Q2, the emitters of the triodes Q1 and Q2 are connected to the LED lamp through the connector CON2, and the collectors of the triodes Q1 and Q2 are connected to the ground. The PWM1 and PWM2 signals output by the IO22 and IO21 of the Loongan ESP32 module are respectively connected to the bases of Q1 and Q2, and are respectively connected in series with current-limiting resistors R3 and R4 and in parallel with shunt resistors R5 and R6 for reducing the current input to the bases of the triodes Q1 and Q2. The PWM signal controls the on-off of the triodes Q1 and Q2, thereby controlling the brightness change of the LED lamp.

[0037] Please refer to Figure 6The 3-port of the infrared receiving module is connected to the 3.3V voltage output by the power supply unit through a current-limiting resistor R9. The infrared receiving module is connected to the 3.3V voltage through a resistor R10 through the 1-port, and outputs an IR / IN signal to the IO19 port of the Leshi ESP32 module after receiving the infrared signal sent by the remote controller. The 2-port of the infrared receiving module is grounded and connected to the 3.3V voltage through a capacitor C7.

[0038] Please refer to Figure 7 The copper bell column outputs a Touch signal to the IO4 port of the Leshi ESP32 module after being touched.

[0039] Please refer to Figure 8 The sensing control unit in the embodiment further has a buzzer. The 1-port of the buzzer is connected to the 3.3V voltage output by the power supply unit through a current-limiting resistor R9. The 2-port of the buzzer is electrically connected to the emitter of a triode Q3. The collector of the triode Q3 is grounded. The base of the triode Q3 is connected to the IO18 port of the Leshi ESP32 module. The Leshi ESP32 module sends a control signal to control the buzzer through the IO18 port. The base of the triode Q3 is connected in series with a current-limiting resistor R11 and in parallel with a shunt resistor R12 to reduce the current input to the base of the triode Q3 and prevent the triode Q3 from being burned out.

[0040] In actual use, after connecting a 24V power supply to the power supply unit, it is converted into a 3.3V voltage, and then the voltage is transmitted to the sensing control unit. First of all, the sensing control unit can control the LED lamp by sensing gestures. The VL53L0X module continuously emits infrared rays to the front. When the user stretches his hand in front of the VL53L0X module, the VL53L0X module receives the infrared rays reflected by the hand, and then transmits the distance information of the hand to the Loongan ESP32 module; the Loongan ESP32 module detects the hand size through its built-in timing function. After 2S, the light switching function is started; when the hand changes from far to near, the VL53L0X module transmits the distance information of the hand to the Loongan ESP32 module, and the Loongan ESP32 module detects that the distance of the hand is getting closer, and then starts the dimming function, and the output PWM signal increases the brightness of the lamp; conversely, when the hand moves from near to far, the Loongan ESP32 module controls the output PWM signal to reduce the brightness of the lamp. Secondly, the sensing control unit can also control the LED lamp through Bluetooth and Wifi. The Loongan ESP32 module is equipped with Bluetooth and Wifi modules. By connecting Bluetooth or Wifi through a remote controller, the Loongan ESP32 module can output a control signal, and then convert the control signal into a PWM signal and transmit it to the LED drive circuit to control the LED lamp. Further, the sensing control unit can be remotely controlled by an infrared remote controller. By pressing the button on the infrared remote controller, a control signal is sent to the infrared receiving module, and the Loongan ESP32 module converts the control signal into a PWM signal and transmits it to the LED drive circuit to control the LED lamp. Further, the sensing control unit can also be controlled by touching. After touching the gong column with your hand, the gong column transmits a control signal to the Loongan ESP32 module, which is then converted into a PWM signal and transmitted to the LED drive circuit to control the LED lamp. Finally, the sensing control unit also has a buzzer function. When some special situations occur, the buzzer can receive the buzzer signal output by the ESP32 module and emit a buzzing sound.

[0041] The terminology used in the embodiments of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the embodiments of the present application. As used in the description of the embodiments of the present application and the appended claims, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It also will be understood that the term "multiple" refers to two or more, unless otherwise indicated. The terms "first", "second", "third", etc. are used only to distinguish one element from another and are not used to describe a particular sequential or chronological order, unless otherwise indicated. The term "and / or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items. The above description is presented in connection with the accompanying drawings, which show details of specific embodiments. The number of elements in the drawings is not meant to limit the scope of the embodiments of the present application. The above description is presented to enable any person skilled in the art to practice the embodiments of the present application as claimed.

[0042] The above embodiments only express a specific implementation of the present application, and the description is more specific and detailed, but it cannot be understood as limiting the scope of the present application. It should be noted that for those skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are within the scope of protection of the present application.

Claims

1. An infrared-sensing LED control circuit, characterized in that: The device comprises a power supply unit and a sensor control unit; the power supply unit is used to supply power to the sensor control unit; the sensor control unit comprises an infrared distance sensing module, an MCU processor and an LED drive circuit; the infrared distance sensing module generates a distance signal after sensing an object, the MCU processor is electrically connected to the infrared distance sensing module and processes the distance signal to generate a PWM signal, and the LED drive circuit receives the PWM signal to control the LED light.

2. The LED control circuit according to claim 1, wherein: The sensing control unit further includes an infrared receiving module and an infrared remote controller, wherein the infrared remote controller sends a control signal to the infrared receiving module, and the infrared receiving module transmits the control signal to the MCU processor.

3. The LED control circuit according to claim 2, wherein: The sensor control unit also includes a gong column. When a human body touches the gong column, the gong column transmits a control signal to the MCU processor.

4. The LED control circuit according to claim 3, wherein: The sensor control unit also includes a Bluetooth module, a Wifi module and a remote controller, and the remote controller sends a signal to the MCU processor in the form of a Bluetooth or Wifi connection.

5. The LED control circuit according to any one of claims 1 to 4, characterized in that: The power supply unit includes a buck step-down circuit, which converts a 24V voltage into a 3.3V voltage.

6. The LED control circuit according to claim 5, wherein: The power supply unit outputs a 3.3V voltage to the infrared distance sensing module, the MCU processor and the infrared receiving module.

7. The LED control circuit according to claim 6, wherein: The LED driving circuit also includes a transistor, the PWM signal is connected to the base of the transistor, the emitter of the transistor is connected to the LED lamp, and the collector of the transistor is grounded. The MCU processor sends a PWM signal of a certain frequency to control the conduction and shutdown of the transistor, thereby controlling the LED lamp.

8. The LED control circuit according to claim 7, wherein: The base of the transistor is further connected in series with a current limiting resistor, and the base and collector of the transistor are further connected in parallel with a shunt resistor.

9. The LED control circuit according to claim 8, wherein: The circuit in which the infrared distance sensing module outputs a distance signal to the MCU processor is also connected in series with a current limiting resistor.

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