Flexible PCB Surface Actuation for Micro-Robot Eyelash Placement

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Solution Overview

Problem

Existing eyelash application methods lack precision and customization, particularly in applying false lashes or eyelash implants, due to limitations in robotic control and adaptability.

Innovation Solution

A system utilizing micro-robots with magnets and a flexible printed circuit board (PCB) substrate, equipped with linear actuators, allows for precise adjustment of pitch, yaw, and roll, enabling customizable eyelash application through a combination of sliding and levitation mechanisms.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If traditional robotic systems are used for eyelash application, then the application process can be automated, but the precision and customization capability is insufficient

Engineering Contradiction:

Improveplacement precisionVSAvoidcustomization capability

Core Design Contradiction:

Measurement precisionVSAdaptability or versatility

Solution Approach 1:

The robotic system is segmented into multiple independent linear actuators (at least three) that can individually control different degrees of freedom (pitch, yaw, roll) of the micro-robot. This segmentation allows precise positional control while maintaining adaptability for customized eyelash application angles and positions.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The system employs dynamic adjustment capabilities where the linear actuators can real-time modify the micro-robot's position and orientation. The flexible PCB substrate allows the micro-robot to assume different configurations, enabling customization for various eyelash application requirements while maintaining precision through active control.

Inventive Principle:

Principle #15Dynamics

2Adaptability or versatility

If a rigid structure is used for robotic control, then structural stability is maintained, but adaptability for precise angular adjustment is limited

Engineering Contradiction:

Improveangular adjustment capabilityVSAvoidstructural stability

Core Design Contradiction:

Adaptability or versatilityVSStability of the object's composition

Solution Approach 1:

The micro-robot incorporates a flexible PCB substrate that serves as both structural support and a flexible mounting platform. This flexible foundation allows the micro-robot to achieve various angles and configurations for customized eyelash application while the linear actuators provide stable positional control, resolving the contradiction between flexibility and stability.

Inventive Principle:

Principle #30Flexible shells and thin films

Solution Approach 2:

The system transitions from a static rigid structure to a dynamic configurable system where the flexible PCB allows continuous adjustment of the micro-robot's orientation. The linear actuators dynamically modify the position and angle, providing both adaptability for customization and stability for precise placement during the application process.

Inventive Principle:

Principle #15Dynamics

3Manufacturing precision

If multiple linear actuators are added for precise control, then positioning accuracy improves, but device complexity increases

Engineering Contradiction:

Improvepositioning accuracyVSAvoidactuator array complexity

Core Design Contradiction:

Manufacturing precisionVSDevice complexity

Solution Approach 1:

The linear actuators serve multiple functions simultaneously: they control pitch, yaw, and roll angles, provide positional adjustment, and enable customization for different eyelash types and application positions. This multi-functionality reduces the need for separate specialized components, managing device complexity while maintaining high positioning accuracy.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The control system is segmented into independent linear actuators, each responsible for specific degrees of freedom. This segmentation allows for modular control where each actuator can be independently optimized and controlled, simplifying the overall system architecture despite the multiple actuators required for precise three-dimensional positioning and orientation control.

Inventive Principle:

Principle #1Segmentation

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

Enables precise and customizable application of eyelashes by allowing micro-robots to adjust their position and angle, ensuring accurate placement and adherence to the eyelid.

Implementation Method 1

plurality of linear actuators coupled to the motor base, wherein the plurality of linear actuators is configured to adjust the flexible PCB substrate

Methodology Applied

Scientific EffectLinear actuation: Mechanical Force

Implementation Method 2

each micro-robot of the one or more micro-robots comprises a plurality of magnets

Methodology Applied

Scientific EffectMagnetic interaction: Magnetism

Data Source

PatentUS20250332729A1Actuated flexible surface for micro-robot maneuverability

Publication Date: 2025.10.30 LOREAL SA

AI summary

A system for applying eyelashes, the system including a flexible printed circuit board (PCB) substrate, a motor base located under the flexible PCB substrate, and plurality of linear actuators coupled to the motor base, wherein the plurality of linear actuators is configured to adjust the flexible PCB substrate. Further, a method of applying an eyelash, including positioning one or more micro-robots onto a flexible PCB substrate, adjusting a pitch, yaw, roll, or a combination thereof of the one or more micro-robots with plurality of linear actuators under the flexible PCB substrate, and applying the eyelash with the one or more micro-robots.