Tactile Information Display Using Electroactive Membrane Actuators
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Solution Overview
Problem
Existing information delivery devices and systems are visually-based, excluding the visually impaired from accessing information.
Innovation Solution
A device and system utilizing individually-addressable cells with electrically-active materials that change shape or position in response to electrical current, connected through an electrical network, and topped with a flexible membrane for tactile information presentation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If visually-based devices and systems are used, then information delivery capability is improved, but accessibility to visually impaired users deteriorates
Solution Approach 1:
The patent replaces visual presentation (optical system) with tactile presentation (mechanical system). The display device uses an array of actuators that physically deform a flexible membrane to create raised tactile patterns, substituting the optical display mechanism with a mechanical tactile generation mechanism that works independently of visual capability.
Solution Approach 2:
The patent changes the presentation parameter from visual (light, color, image) to tactile (physical deformation, height, texture). By controlling the degree of membrane deformation through electrical signals to actuators, the system transforms information into a different physical parameter domain that is perceivable by touch rather than sight.
2Adaptability or versatility
If tactile presentation is implemented, then accessibility to visually impaired users is improved, but device complexity increases
Solution Approach 1:
The patent divides the display surface into a grid array of independently controllable cells, each with its own actuator. This segmentation allows complex tactile patterns to be constructed from simple, identical modular units, making the system programmable and adaptable while keeping individual cell complexity low.
Solution Approach 2:
The patent creates a universal tactile display platform where the same array of actuators and flexible membrane can present any type of tactile information (text, images, graphs, navigation cues) by varying the deformation patterns. This multi-functionality reduces overall system complexity compared to having specialized devices for different information types.
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 the visually impaired to receive information in tactile form, such as Braille characters and navigational symbols, with high granularity and complexity, facilitating access to various types of information and location-based data.
Implementation Method 1
each cell including an electrically-active material capable of changing shape and/or position in response to an electrical current
Data Source
AI summary
Embodiments of the invention provide a device and system for providing information to a user in a tactile form. In one embodiment, the invention provides a device for providing information to a user, the device comprising: a plurality of individually-addressable cells, each cell including an electrically-active material capable of changing shape and/or position in response to an electrical current; a electrical network connected to, and capable of delivering the electrical current to, each of the plurality of individually-addressable cells; a membrane atop the plurality of individually-addressable cells, onto which the change in shape and/or position of the electrically-active material in each cell may be transferred; and a receiver for receiving information capable of tactile presentation to a user using the plurality of individually-addressable cells.