Braille Sheet Overlay for Tactile Feedback on Touch Displays
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Solution Overview
Problem
Existing portable electronic devices with touch-sensitive displays lack effective methods to provide tactile feedback for visually impaired users, limiting their ability to interact with the device efficiently.
Innovation Solution
Incorporating piezoelectric actuators and force sensors into the device, which detect touches on a sheet with Braille characters and provide tactile feedback to identify characters, allowing for tactile output and improved user interaction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a touch-sensitive display is used in portable electronic devices, then user input and output efficiency is improved, but tactile feedback capability is lost
Solution Approach 1:
The patent combines a touch-sensitive display with a Braille sheet layer, merging visual and tactile input modalities into a single interface system. The Braille sheet includes raised bumps that correspond to characters, allowing users to feel character positions while the touch-sensitive display detects their inputs.
Solution Approach 2:
The patent introduces an intermediary layer (the Braille sheet with raised bumps) between the user and the touch-sensitive display. This intermediary translates visual display information into tactile feedback, enabling visually impaired users to interact with the display through touch while the display processes their inputs.
2Loss of information
If traditional display interfaces are used, then visual information is effectively conveyed, but accessibility for visually impaired users is limited
Solution Approach 1:
The patent creates a universal interface that serves both visually able and visually impaired users. The same touch-sensitive display with Braille sheet overlay can be used by anyone, providing visual display functionality while simultaneously offering tactile feedback for accessibility.
Solution Approach 2:
The patent applies local quality by creating raised bumps at specific locations on the Braille sheet corresponding to character positions. Each location has a distinct tactile quality (raised vs. flat) that encodes character information, allowing users to differentiate between characters through localized tactile sensations.
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 visually impaired users to interact with portable electronic devices by providing tactile feedback, enhancing their ability to input and navigate through the device's interface effectively.
Implementation Method 1
A touch-sensitive display 118... is operable to detect a touch... provide tactile feedback
Data Source
Figure 1
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AI summary
A method includes detecting a sheet corresponding to a plurality of characters on a touch-sensitive input device; detecting, by the touch-sensitive input device, a touch; determining a next character output; in response to determining that the touch is associated with a location on the sheet, which location is associated with the next character, providing tactile feedback to identify the next character.