US 12,279,352 B2
String light circuit with human body sensing
Keyong Song, Taizhou (CN)
Filed by Keyong Song, Taizhou (CN)
Filed on Jul. 13, 2023, as Appl. No. 18/351,616.
Claims priority of application No. 202221800856.3 (CN), filed on Jul. 13, 2022.
Prior Publication US 2024/0023219 A1, Jan. 18, 2024
Int. Cl. H05B 47/13 (2020.01); H05B 45/3725 (2020.01); H05B 45/46 (2020.01); H05B 47/17 (2020.01); F21S 4/10 (2016.01); F21Y 115/10 (2016.01)
CPC H05B 47/13 (2020.01) [H05B 45/3725 (2020.01); H05B 45/46 (2020.01); H05B 47/17 (2020.01); F21S 4/10 (2016.01); F21Y 2115/10 (2016.08)] 17 Claims
OG exemplary drawing
 
1. A string light circuit with human body sensing, comprising a main control MCU module, a timer module, an audio output module, LED lights with multiple circuit-driven channels, an infrared receiving module, a mode switching module, a body-sensing module, and a power supply module, wherein
the timer module provides periodic pulse signals to the main control MCU module to drive the main control MCU module to operate;
the audio output module drives a speaker to generate sound and is controlled by the main control MCU module;
the LED lights with multiple circuit-driven channels are controlled by the main control MCU module and generate light signals under the control of the main control MCU module;
the infrared receiving module receives infrared signals to control the main control MCU module to operate in a preset mode;
the mode switching module receives external mechanical actions to control the main control MCU module to operate in a preset mode;
the body-sensing module senses presence of people nearby to control the main control MCU module to operate in a preset mode;
the power supply module supplies power to the main control MCU module, the timer module, the audio output module, the LED lights with multiple circuit-driven channels, the infrared receiving module, the mode switching module, and the body-sensing module;
the power supply module is a voltage conversion circuit with an low dropout (LDO) chip as a core, a 4.5 V dry battery is adopted as a power supply, a connection between the power supply and an input end of the LDO chip is controlled by a switch, and the LDO chip outputs a voltage of 3.3 V;
power supply ends of the main control MCU module, the timer module, and the LED lights with multiple circuit-driven channels are directly connected to the input end of the LDO chip; and
the infrared receiving module and the body-sensing module are connected to an output end of the LDO chip.