Sequential LED Control Circuit for Footwear Safety
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Solution Overview
Problem
Existing footwear with integrated light-emitting devices for safety at night lacks effective sequential control and water/dust protection, leading to poor illumination and reduced battery life.
Innovation Solution
A compact circuit device with a waterproof enclosure, motion-actuated switch, and controller that drives multiple light-emitting diodes in predefined sequential lighting patterns, including equal and gradually increasing flashing periods, to provide energy-efficient and attractive illumination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If continuous illumination is used to provide strong visibility, then illumination intensity is improved, but energy consumption increases
Solution Approach 1:
The patent implements periodic illumination through two lighting modes: a first lighting mode with a longer lighting period and a second lighting mode with a shorter lighting period. The controller alternates between these modes, providing illumination in intervals rather than continuously, which reduces overall energy consumption while maintaining visibility during active periods.
Solution Approach 2:
The system dynamically switches between different lighting modes based on motion detection. When motion is detected, the system transitions to the second lighting mode with shorter intervals for immediate visibility. When no motion is detected, it switches to the first lighting mode with longer intervals for energy conservation, making the illumination pattern adaptive to real-time conditions.
2Device complexity
If simple manual switch is used to control light sources, then device complexity is reduced, but ease of operation is worsened
Solution Approach 1:
The system employs a motion detection module that automatically detects user approach and triggers the controller to switch between lighting modes without requiring manual intervention. The footwear itself serves the function of detecting and responding to user needs, eliminating the need for users to manually operate switches while maintaining ease of use.
3Ease of manufacture
If light sources are exposed to environment without protection, then ease of manufacture is improved, but reliability is worsened
Solution Approach 1:
The patent implements a nested structure where the light source, controller, and other electronic components are housed within a waterproof shell. This shell is integrated into the footwear structure, providing protective enclosure while maintaining a compact design. The nested arrangement protects sensitive components from environmental factors without significantly complicating the manufacturing process.
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 solution enhances safety and visibility during night activities by generating an attractive sequential light pattern while extending the device's lifespan through water and dust protection and efficient energy use.
Implementation Method 1
the motion-actuated switch is mounted in the water-proof enclosure, for generating a first triggering signal in response to a motion of the object
Implementation Method 2
each of the light-emitting devices includes a light-emitting diode
Implementation Method 3
driving the N light-emitting diodes lighting based on a first pre-defined lighting sequence
Data Source
AI summary
The invention provides a circuit device for controlling N light-emitting devices disposed in a sequence on an object, wherein N is an integer larger than 1, and each light-emitting device includes a respective light-emitting diode. The circuit device includes a water-proof enclosure, a motion-actuated switch, a controller, and a battery. Particularly, the controller is capable of driving the light-emitting diodes lighting up on the basis of a first predefined sequence and a consequent second predefined sequence when triggered by the motion-actuated switch.