String Light Circuit with Body Sensing and Audio Output

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Solution Overview

Problem

Existing festive props lack interactive and engaging features, failing to enhance the festive atmosphere and entertainment experience.

Innovation Solution

A string light circuit with human body sensing is developed, incorporating a main control MCU module, timer module, audio output module, LED lights, infrared receiving module, mode switching module, body-sensing module, and power supply module, which generates sound and light in response to human presence and allows remote control and external button operation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If existing festive props use simple on-off commands, then the device complexity is low, but the entertainment value and user engagement are insufficient

Engineering Contradiction:

Improveentertainment valueVSAvoidcontrol functionality

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent implements multi-functionality by integrating multiple control methods (infrared remote control, body sensing, mechanical button) and multiple output modes (light patterns, sound effects, combined modes) into a single festive prop device. The main control MCU coordinates these different modules to provide diverse entertainment experiences without requiring multiple separate devices.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The patent applies dynamics by enabling the festive prop to automatically adapt its behavior based on detected conditions. The body sensing module triggers automatic activation when motion is detected, and the system dynamically switches between different light and sound modes based on user interaction, making the device responsive and engaging rather than static.

Inventive Principle:

Principle #15Dynamics

2Adaptability or versatility

If multiple control modules are added to enhance interactivity, then the user engagement increases, but the power consumption increases

Engineering Contradiction:

Improveinteractive controlVSAvoidpower consumption

Core Design Contradiction:

Adaptability or versatilityVSUse of energy by moving object

Solution Approach 1:

The patent implements periodic action through the timer module that controls the operational cycles of different components. The system can enter sleep modes between activations, and the body sensing module triggers periodic activation rather than continuous operation. This reduces overall power consumption while maintaining interactive capabilities when needed.

Inventive Principle:

Principle #19Periodic action

Solution Approach 2:

The body sensing module enables self-service operation by automatically detecting user presence and activating the appropriate modes without requiring manual power management. The system serves itself by intelligently activating components only when users are nearby, reducing unnecessary power consumption from continuously active components.

Inventive Principle:

Principle #25Self-service

3Adaptability or versatility

If body sensing and remote control features are added, then the festive atmosphere enhancement improves, but the device complexity increases

Engineering Contradiction:

Improveatmosphere control capabilityVSAvoidmodule quantity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent applies merging by integrating multiple control and output functions into a unified system architecture. The main control MCU coordinates the infrared receiving module, body sensing module, LED lights, and audio output as integrated components rather than separate systems, reducing overall system complexity through centralized control while maintaining diverse capabilities.

Inventive Principle:

Principle #5Merging (Combining)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The string light circuit enhances the festive atmosphere by providing interactive sound and light effects, increasing the fun and engagement of festive props, and allowing for customizable control through remote and external inputs.

Implementation Method 1

the body-sensing module senses presence of people nearby to control the main control MCU module to operate in a preset mode

Methodology Applied

Scientific EffectInfrared radiation detection: Infrared Radiation

Implementation Method 2

the body-sensing module is an infrared pyroelectric sensor and adopts SR602

Methodology Applied

Scientific EffectPyroelectric effect: Pyroelectric Effect

Data Source

PatentUS12279352B2String light circuit with human body sensing

Publication Date: 2025.04.15 SONG KEYONG

AI summary

A string light circuit with human body sensing includes 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. The timer module provides periodic pulse signals to the main control MCU module; the audio output module drives a speaker to generate sound; the LED lights with multiple circuit-driven channels are controlled by the main control MCU module and generate light signals; 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 the presence of people nearby to control the main control MCU module to operate in a preset mode.