一种控制电路及充电式离网氛围桌面灯
By adding a master switch to the rechargeable off-grid ambient desktop light, the problem of the rechargeable battery continuing to supply power after the lamp control circuit turns off the lamp beads is solved, thereby reducing power loss and improving safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NINGBO YAMAO OPTOELECTRONICS CO LTD
- Filing Date
- 2025-06-18
- Publication Date
- 2026-07-17
AI Technical Summary
In existing rechargeable off-grid ambient desktop lights, even after the lamp control circuit turns off the LED beads, the rechargeable battery continues to supply power to the LED beads, resulting in energy loss and safety hazards.
A master switch is added between the charging circuit and the LED beads. By controlling the master switch, the physical power supply line is cut off to prevent the rechargeable battery from supplying power to the LED beads, and the power supply is disconnected when the charging circuit or the lamp control circuit is overloaded.
It greatly reduces the energy loss of the rechargeable battery, improves the reliability and safety of the equipment, and prevents the LED beads from being affected by overload conditions.
Smart Images
Figure CN224521229U_ABST
Abstract
Claims
1. A control circuit, characterized by include: Charging circuit, lamp control circuit, main switch; The input terminal of the charging circuit is connected to the charging power supply, and the output terminal is connected to the power supply terminal of the rechargeable battery, which is used to convert the output electrical energy of the charging power supply into the electrical energy required for the rechargeable battery to work. The first terminal of the main switch is connected to the output terminal of the rechargeable battery, and the second terminal is connected to N LED beads respectively, where N is a positive integer. The lamp control circuit is connected to each of the lamp beads respectively, and is used to control the opening or closing of each of the lamp beads when the main switch is closed.
2. The control circuit of claim 1, wherein, The charging circuit includes: a rectifier circuit, a switching module, a first DC-DC conversion module, and a second DC-DC conversion module; The input terminal of the switching module is connected to the charging power supply, the first output terminal is connected to the input terminal of the rectifier circuit, and the second output terminal is connected to the input terminal of the first DC-DC conversion module. It is used to connect its own input terminal and the first output terminal when the output power of the charging power supply is AC power, and to connect its own input terminal and the second output terminal when the output power of the charging power supply is DC power. The output terminal of the first DC-DC conversion module is connected to the power supply terminal of the rechargeable battery, and is used to convert the output power of the charging power supply into the power required for the operation of the rechargeable battery when the output power of the charging power supply is DC power. The input terminal of the second DC-DC conversion module is connected to the output terminal of the rectifier circuit, and the output terminal is connected to the power supply terminal of the rechargeable battery. It is used to convert the output power of the charging power supply into the power required for the operation of the rechargeable battery when the output power of the charging power supply is AC power.
3. The control circuit of claim 1, wherein, The charging circuit includes: a diode, a voltage control chip, a first resistor, and a second resistor; The anode of the diode is connected to the output terminal of the charging power supply, and the cathode is connected to the voltage detection terminal of the voltage control chip, the first terminal of the first resistor, the first terminal of the second resistor, and the ground wire, respectively. The first enable terminal of the voltage control chip is connected to the second terminal of the first resistor, the second enable terminal is connected to the first terminal of the second resistor, the third enable terminal is connected to the second terminal of the second resistor, and the voltage output terminal is connected to the power supply terminal of the rechargeable battery. It is used to enable its own first enable terminal, second enable terminal and third enable terminal according to the output voltage of the charging power supply. The second end of the first resistor is connected to ground.
4. The control circuit of claim 3, wherein, The charging circuit also includes: a first indicator light and a second indicator light; The first end of the first indicator light is connected to the second end of the second resistor, and the second end is connected to the third enable terminal of the voltage control chip, for lighting up when the charge of the rechargeable battery is not equal to the preset rated charge. The first end of the second indicator light is connected to the second end of the second resistor, and the second end is connected to the fourth enable terminal of the voltage control chip, so as to light up when the charge of the rechargeable battery is equal to the preset rated charge.
5. The control circuit of claim 1, wherein, The lamp control circuit includes: a voltage conversion chip, a touch switch, and N power electronic devices; The touch switch is connected to the enable terminal of the voltage conversion chip; The power supply terminal of the voltage conversion chip is connected to the second terminal of the main switch, and the N voltage output terminals are connected one-to-one with the control terminals of each of the power electronic devices, for outputting the corresponding voltage to the control terminals of each of the power electronic devices based on the touch time of the touch switch; Each power electronic device has its first terminal connected to each of the lamp beads, and its second terminal connected to ground. It is used to conduct when the main switch is closed and the voltage output by the voltage conversion chip received by its own control terminal is greater than its own preset conduction voltage.
6. The control circuit of claim 5, wherein, The power electronic device is an N-type MOS transistor, the control terminal of the power electronic device is the gate of the N-type MOS transistor, the first terminal of the power electronic device is the drain of the N-type MOS transistor, and the second terminal of the power electronic device is the source of the N-type MOS transistor.
7. The control circuit of claim 5, wherein, The light bead is a light-emitting diode (LED), the cathode of which is connected to the second terminal of a corresponding power electronic device, and the anode of which is connected to the battery.
8. The control circuit of claim 5, wherein, The lamp control circuit also includes: N third resistors and N fourth resistors; The first end of each of the third resistors is connected to the voltage output terminal of the voltage conversion chip, and the second end is connected to the control terminal of each of the power electronic devices. The first end of each of the fourth resistors is connected to the second end of each of the third resistors in a one-to-one correspondence, and the second end is connected to the second end of the corresponding power electronic device and the ground wire, respectively.
9. The control circuit according to claim 5, characterized in that, The lamp control circuit also includes: The filtering module has its first end connected to the second end of the main switch and the power supply end of the voltage conversion chip, and its second end connected to the grounding end and the ground wire of the voltage conversion chip.
10. A rechargeable off-grid ambient desktop lamp, characterized in that, include: N LED beads, a rechargeable battery, and a control circuit as described in any one of claims 1 to 9, wherein each LED bead is connected to the rechargeable battery and the control circuit, and N is a positive integer.