Tactile Overlay for Touchscreen Accessibility
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Point-of-sale systems, particularly those with touch-screen interfaces, can be difficult for visually impaired individuals to use due to the lack of tactile feedback and edges, making it challenging for them to interact effectively with the devices.
Innovation Solution
A tactile overlay is introduced for computing devices, providing tactile feedback through buttons, cut-outs, or capacitive-sensing touch buttons that correspond to soft buttons on the screen, allowing users to discern and select options with ease, and can be configured for various orientations and sizes to accommodate different devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a flat touch-screen surface is used, then the device has a simple and smooth surface, but visually impaired individuals cannot detect buttons or edges through tactile feedback
Solution Approach 1:
The overlay divides the touchscreen surface into distinct segmented regions, each corresponding to a specific button or interactive element. These segments create tactile boundaries that visually impaired users can detect through touch, allowing them to identify and locate different functions on the screen without seeing them.
Solution Approach 2:
The overlay introduces a third dimension (tactile depth) to the two-dimensional touchscreen surface. By creating raised edges, ridges, or varied surface profiles, the overlay enables tactile perception that complements the visual display, allowing users to interact with the interface through multiple sensory modalities.
2Adaptability or versatility
If overlay buttons are added to provide tactile feedback, then accessibility is improved, but the device complexity increases
Solution Approach 1:
The overlay serves multiple functions simultaneously: it provides tactile feedback for accessibility, maintains the visual display capabilities of the touchscreen, and can be configured for different orientations and sizes to accommodate various devices. This multi-functionality justifies the added complexity by delivering multiple benefits from a single component.
Solution Approach 2:
The overlay is designed to be adaptable and reconfigurable, allowing it to be customized for different device orientations, sizes, and specific accessibility needs. This dynamic adaptability enables the same overlay structure to serve diverse applications and user requirements without requiring completely different designs for each scenario.
Data Source
AI summary
A system for facilitating engagement with a touch screen by a visually impaired person comprises an overlay. The overlay includes a bottom surface having a capacitive component and an overlay locating element. The overlay locating element is configured to interface with a touch screen underlying the overlay to provide a position of the overlay relative to the touch screen. A top surface of the overlay includes a tactile button that is located opposite of the capacitive component. The tactile button and the capacitive component are above the region of a displayed soft button. Engagement of the tactile button by the visually impaired person results in the capacitive component interacting with the touch screen in the region of the displayed soft button to provide a capacitive input detectable by the touch screen.