Touch table lamp control circuit

Abstract

The utility model discloses a touch desk lamp control circuit, which belongs to the desk lamp control technical field, and comprises an EMC filter circuit, a constant voltage circuit, a constant current circuit, a touch control circuit and an MCU control circuit, the EMC filter circuit is electrically connected with the constant voltage circuit, the constant voltage circuit is electrically connected with the touch control circuit, the constant current circuit is electrically connected with the MCU control circuit, and the touch control circuit is electrically connected with the MCU control circuit. The constant voltage circuit is electrically connected with the MCU control circuit, the MCU control circuit is electrically connected with the touch control circuit, and the EMC filter circuit is electrically connected with the constant current circuit. The touch table lamp control circuit provided by the utility model can provide a switch signal for the switch controller according to the touch duration of a user, so that the switch controller controls the on-off state of an LED night lamp, and simultaneously outputs a PWM dimming signal to the constant current circuit to carry out dimming control on the LED light source plate, so that the LED night lamp can be turned on and turned off. The functions of a night lamp, multi-section dimming and logic signal memory of the table lamp are achieved, and the use convenience of the table lamp is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of table lamp control, in particular to a touch table lamp control circuit. Background Art

[0002] Table lamps are a common household item, usually used to provide local lighting, such as for reading, working or increasing the atmosphere of a room. The design and light of a table lamp can add atmosphere to a room, making it more cozy, comfortable or having a specific style. Table lamps of different styles and types can bring different atmospheres and decorative effects to a room. Compared with the main lights in the entire room, table lamps usually consume less energy, so they play a certain role in energy saving and environmental protection. However, most of the current table lamp switches are mechanical switches with relatively single functions, which are inconvenient for users to use and cannot meet the needs of users. Utility Model Content

[0003] The technical problem to be solved by the utility model is that most of the current table lamp switches are mechanical switches with relatively single functions, which are inconvenient for users to use and cannot meet the needs of users.

[0004] In order to solve the above technical problems, a technical solution adopted by the utility model is: providing a touch desk lamp control circuit, including an EMC filter circuit, a constant voltage circuit, a constant current circuit, a touch control circuit and an MCU control circuit, the EMC filter circuit is electrically connected to the constant voltage circuit, the constant voltage circuit is electrically connected to the touch control circuit, the constant voltage circuit is electrically connected to the MCU control circuit, the MCU control circuit is electrically connected to the touch control circuit, and the EMC filter circuit is electrically connected to the constant current circuit.

[0005] The utility model is further configured such that the MCU control circuit transmits a PWM dimming signal to a constant current circuit, an output end of the constant current circuit is connected to a light source board, the constant current circuit transmits a variable current to the light source board, and the light source board is an LED light source board.

[0006] Through the above technical solution, the MCU control circuit can output a PWM dimming signal to the constant current circuit, so that the constant current circuit outputs a variable current to the LED light source board to perform dimming control on the LED light source board.

[0007] The utility model is further configured such that the output end of the MCU control circuit is connected to a switch controller, the MCU control circuit transmits a switch signal to the switch controller, the output end of the switch controller is connected to a night light, the switch controller controls the switch state of the night light, and the night light is an LED light.

[0008] Through the above technical solution, the MCU control circuit can output a switch signal to the switch controller, so that the switch controller can control the switch state of the LED night light according to the switch signal.

[0009] The utility model is further configured that the input end of the EMC filter circuit is connected with a fuse F1 and a varistor VR1, and the ground end of the EMC filter circuit is connected with a magnetic bead FB4.

[0010] Through the above technical solution, the input passes through the fuse F1 and the varistor VR1 to form an overvoltage and overcurrent protection for the back-end circuit. At the same time, an FB4 magnetic bead is placed on the ground line, which can be combined to suppress the medium and high frequency noise in the switching power supply.

[0011] The utility model is further configured that the constant voltage circuit supplies power to the touch control circuit and the MCU control circuit, and the voltage at the power supply output end of the constant voltage circuit is 3.3V.

[0012] The utility model is further configured that the touch control circuit senses a touch signal and transmits the touch signal to the MCU control circuit.

[0013] Through the above technical solution, the touch control circuit is provided with a touch control chip AS9101D, which can receive the user's touch signal, so that the touch circuit transmits the user's touch signal to the MCU control circuit.

[0014] The beneficial effects of the utility model are as follows:

[0015] The utility model sets an EMC filter circuit, a constant voltage circuit, a constant current circuit, a touch control circuit and an MCU control circuit, connects an AC220V power supply to the input end of the EMC filter circuit, and transmits the rectified power supply to the constant voltage circuit and the constant current circuit, so that the constant voltage circuit serves as a 3.3V power supply to provide power for the touch control module and the MCU controller. When the touch control chip AS9101D receives a touch signal from the user, it provides a switch signal to the switch controller according to the touch duration of the user, so that the switch controller controls the switch state of the LED night light. At the same time, it also outputs a PWM dimming signal to the constant current circuit, so that the constant current circuit provides a variable current for the LED light source board, and performs dimming control on the LED light source board, thereby realizing the functions of the night light, multi-stage dimming and logic signal memory of the desk lamp, and improving the convenience of using the desk lamp. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall composition of the utility model;

[0017] Figure 2 This is the EMC filter circuit diagram in the utility model;

[0018] Figure 3 The circuit diagram of the 3.3V constant voltage source in the utility model;

[0019] Figure 4 It is a circuit diagram of the constant current source in the utility model;

[0020] Figure 5 is a circuit diagram of the touch control module in the present utility model;

[0021] Figure 6 It is a circuit diagram of the MCU controller in the utility model;

[0022] Figure 7 This is the MCU control logic diagram in the utility model. DETAILED DESCRIPTION

[0023] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0024] See also Figures 1 to 7 , a touch desk lamp control circuit, including an EMC filter circuit, a constant voltage circuit, a constant current circuit, a touch control circuit and an MCU control circuit, the input end of the EMC filter circuit is connected with a fuse F1 and a varistor VR1, the ground end of the EMC filter circuit is connected with a magnetic bead FB4, the EMC filter circuit is electrically connected to the constant voltage circuit, the constant voltage circuit is electrically connected to the touch control circuit, the constant voltage circuit is electrically connected to the MCU control circuit, the MCU control circuit is electrically connected to the touch control circuit, and the EMC filter circuit is electrically connected to the constant current circuit;

[0025] The MCU control circuit transmits a PWM dimming signal to the constant current circuit, the output end of the constant current circuit is connected to a light source board, the constant current circuit transmits a variable current to the light source board, the light source board is an LED light source board, the output end of the MCU control circuit is connected to a switch controller, the MCU control circuit transmits a switch signal to the switch controller, the output end of the switch controller is connected to a night light, the switch controller controls the switch state of the night light, the night light is an LED light;

[0026] The constant voltage circuit supplies power to the touch control circuit and the MCU control circuit. The voltage at the power supply output end of the constant voltage circuit is 3.3V. The touch control circuit senses the touch signal and transmits the touch signal to the MCU control circuit.

[0027] When the utility model is in use, an AC220V power supply is connected to the input end of the EMC filter circuit, and the rectified power supply is transmitted to the constant voltage circuit and the constant current circuit, so that the constant voltage circuit serves as a 3.3V power supply to provide power for the touch control module and the MCU controller. When the touch control chip AS9101D receives a touch signal from the user, it provides a switch signal to the switch controller according to the user's touch duration, so that the switch controller controls the switch state of the LED night light, and also outputs a PWM dimming signal to the constant current circuit, so that the constant current circuit provides a variable current for the LED light source board, and performs dimming control on the LED light source board. At the same time, the MCU control circuit can memorize the logic signal, can read the last state of the LED light, and light up the LED light according to the state, thereby realizing the functions of the night light, multi-stage dimming and logic signal memory of the desk lamp.

[0028] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. Touch desk lamp control circuit, characterized in that, include: An EMC filter circuit, a constant voltage circuit, a constant current circuit, a touch control circuit and an MCU control circuit, wherein the EMC filter circuit is electrically connected to the constant voltage circuit, the constant voltage circuit is electrically connected to the touch control circuit, the constant voltage circuit is electrically connected to the MCU control circuit, the MCU control circuit is electrically connected to the touch control circuit, and the EMC filter circuit is electrically connected to the constant current circuit.

2. The touch desk lamp control circuit according to claim 1, characterized in that: The MCU control circuit transmits a PWM dimming signal to a constant current circuit, an output end of the constant current circuit is connected to a light source board, and the constant current circuit transmits a variable current to the light source board, and the light source board is an LED light source board.

3. The touch desk lamp control circuit according to claim 1, characterized in that: The output end of the MCU control circuit is connected to a switch controller, the MCU control circuit transmits a switch signal to the switch controller, the output end of the switch controller is connected to a night light, the switch controller controls the switch state of the night light, and the night light is an LED light.

4. The touch desk lamp control circuit according to claim 1, characterized in that: The input end of the EMC filter circuit is connected to a fuse F1 and a varistor VR1 , and the ground end of the EMC filter circuit is connected to a magnetic bead FB4 .

5. The touch desk lamp control circuit according to claim 1, characterized in that: The constant voltage circuit supplies power to the touch control circuit and the MCU control circuit, and the voltage at the power supply output end of the constant voltage circuit is 3.3V.

6. The touch desk lamp control circuit according to claim 1, characterized in that: The touch control circuit senses a touch signal and transmits the touch signal to the MCU control circuit.

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