Flexible Circuit LED Lighting for Lightweight Wearable Objects

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Solution Overview

Problem

Conventional luminous devices in wearable objects, such as shoes, utilize rigid circuit boards that increase weight, occupy space, complicate installation, require multiple external wires for additional LEDs, and face voltage compatibility issues between different LED colors, leading to complexity and reduced lifespan.

Innovation Solution

A luminous device using a flexible circuit board with integrated battery, sensors, and control chips, allowing for multiple LED colors with the same driving voltage, eliminating external wires, and enabling various lighting modes through a control chip that selects lighting sequences based on sensor inputs.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Power

If rigid circuit boards are used to provide lighting function, then the lighting function can be provided, but the weight of the shoe increases and space is occupied

Engineering Contradiction:

Improvelighting functionVSAvoidweight of shoe

Core Design Contradiction:

PowerVSWeight of moving object

Solution Approach 1:

The patent replaces rigid circuit boards with flexible circuit boards that have a thickness of 0.05-0.2mm. This flexible circuit board can be directly laid on the shoe surface without requiring a rigid substrate, significantly reducing the weight and space occupation while maintaining the lighting function through integrated LED components and circuit traces.

Inventive Principle:

Principle #30Flexible shells and thin films

2Power

If rigid circuit boards are used, then the lighting function is provided, but the installation process becomes complicated

Engineering Contradiction:

Improvelighting functionVSAvoidinstallation process

Core Design Contradiction:

PowerVSEase of manufacture

Solution Approach 1:

The patent integrates the LED light-emitting components, circuit traces, and battery directly onto the flexible circuit board as a single integrated module. This merging of components eliminates the need for separate rigid circuit board installation and external wire connections, simplifying the installation process to a single step of placing the flexible circuit board on the shoe surface.

Inventive Principle:

Principle #5Merging (Combining)

3Adaptability or versatility

If more luminous devices or multiple lighting modes are required, then the design requirements are met, but more external wires are needed

Engineering Contradiction:

Improvelighting modesVSAvoidexternal wires

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent integrates multiple LED components of different colors (red, yellow, green, blue) and their corresponding circuit connections directly onto the flexible circuit board. The circuit traces on the flexible board provide all necessary electrical connections between LEDs, control chip, and battery, eliminating the need for external wires and enabling multiple lighting modes through software control of the integrated components.

Inventive Principle:

Principle #5Merging (Combining)

4Adaptability or versatility

If different colors of predetermined color light-emitting diodes are used, then the lighting diversity is improved, but the power supply circuit design becomes complex due to different driving voltages

Engineering Contradiction:

Improvelighting color diversityVSAvoidpower supply circuit design

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent uses a single battery voltage (3.7V-4.2V) that is compatible with all LED components on the flexible circuit board. The control chip dynamically adjusts the driving current for each LED based on its specific voltage requirements, allowing different colored LEDs with different driving voltages to operate from a single power source without requiring complex voltage conversion circuits for each LED type.

Inventive Principle:

Principle #35Parameter changes

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 reduces device size and weight, simplifies installation, extends LED lifespan, and provides versatile lighting options without increasing circuit complexity.

Implementation Method 1

a first light-emitting diode chip and a first phosphor layer coated on the first light-emitting diode chip

Methodology Applied

Scientific EffectLight-emitting diode: Light Emitting Diode

Implementation Method 2

a first phosphor layer coated on the first light-emitting diode chip

Methodology Applied

Scientific EffectPhosphorescence: Phosphorescence

Data Source

PatentUS12363814B1Luminous device and wearable object with the same

Publication Date: 2025.07.15 TSENG SHEN KO

AI summary

A luminous device includes a flexible circuit board, a battery, a plurality of predetermined color light-emitting diodes, a sensor and a control chip. The battery, the predetermined color light-emitting diodes, the sensor and the control chip are arranged on the flexible circuit board. The sensor is configured to detect an external force to generate a control signal. The control chip is connected to the sensor, the predetermined color light-emitting diodes and the battery. The control chip is configured to receive the control signal and select a lighting mode according to the control signal to control the predetermined color light-emitting diodes emit light. The luminous device of the invention uses the flexible circuit board to sense the external force to emit light without requiring external circuits, so as to reduce the overall volume. Moreover, the luminous device of the invention can be installed or attached on any detachable object.