Microfluidic Display Protrusions for Tactile Navigation Guidance

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Solution Overview

Problem

Existing navigation systems lack effective tactile feedback mechanisms for visually impaired users to follow navigation paths accurately, especially in dynamic environments.

Innovation Solution

A microfluidic layer in user devices is used to create protrusions on the display that correspond to navigation paths, allowing users to receive tactile feedback on their alignment with the correct path, with patterns indicating correct direction, current direction, and deviations.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If visual display information is used for navigation guidance, then information delivery is effective, but visually impaired users cannot perceive navigation paths

Engineering Contradiction:

Improvenavigation guidance effectivenessVSAvoidinaccessibility to visually impaired users

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent replaces visual optical information with tactile mechanical feedback. Microfluidic actuators generate tactile protrusions on the display surface that correspond to navigation path elements, allowing visually impaired users to perceive directional information through touch rather than sight.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent introduces tactile protrusions as an intermediary between the navigation system and the user. These protrusions serve as a mediator that translates digital navigation data into physical touchable forms, enabling indirectly the perception of path information for visually impaired users.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Ease of operation

If tactile feedback is provided through vibrations, then tactile sensation is achieved, but directional precision and path tracing are insufficient

Engineering Contradiction:

Improvetactile feedback provisionVSAvoiddirectional accuracy

Core Design Contradiction:

Ease of operationVSMeasurement precision

Solution Approach 1:

The patent segments the tactile feedback into discrete protrusions arranged in spatial patterns that correspond to navigation path elements. Rather than providing uniform vibration, the system creates distinct tactile markers at specific locations and orientations, enabling users to trace paths and determine directions through the spatial arrangement of protrusions.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent applies tactile feedback locally at specific positions on the display surface corresponding to navigation-relevant locations. The microfluidic actuators generate protrusions only where needed to indicate path direction, turns, or key navigation points, providing localized tactile information that enhances directional precision.

Inventive Principle:

Principle #3Local quality

3Measurement precision

If microfluidic layer is used to create protrusions, then tactile feedback precision is improved, but device complexity increases

Engineering Contradiction:

Improvetactile feedback precisionVSAvoidmicrofluidic system complexity

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The patent merges the microfluidic actuation system with the existing display structure. The microfluidic layer is integrated into or behind the display, allowing tactile protrusions to emerge from the display surface itself. This integration reduces overall device complexity by combining multiple functions into a unified structure.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The microfluidic layer serves multiple functions: it generates tactile protrusions for navigation feedback, maintains display integrity, and can potentially provide other tactile interfaces. This multi-functionality justifies the added complexity by providing versatile tactile output capabilities within a single integrated component.

Inventive Principle:

Principle #6Universality (Multi-functionality)

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

This solution provides visually impaired users with reliable tactile navigation guidance, enhancing their ability to follow paths accurately and safely by using dynamic tactile feedback on the device display.

Implementation Method 1

A user device (e.g., a smart phone, tablet, etc.) may include a microfluidic layer that may dynamically raise the position of the user device display. Protrusions are created using the microfluidic layer in which the protrusions can provide tactile feedback to the user.

Methodology Applied

Scientific EffectMicrofluidics:

Data Source

PatentUS11549819B2Navigation guidance using tactile feedback implemented by a microfluidic layer within a user device

Publication Date: 2023.01.10 INTERNATIONAL BUSINESS MACHINE CORPORATION

AI summary

A computer-implemented method includes: obtaining, by a user device, information defining a navigation path to a destination; and forming, by the user device, protrusions on a display of the user device, wherein a pattern of the protrusions corresponds to the navigation path.