Hybrid Keypad Display Interface for Accessible Transactions
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Solution Overview
Problem
Public access terminals, such as ATMs, pose difficulties for visually impaired users due to the lack of tactile feedback in touch-sensitive displays, making it hard to navigate complex screens with numerous options.
Innovation Solution
A user interface combining a physical keypad with a touch-sensitive display, where the screen depicts the keypad and includes transaction options, allowing users to select options via either the physical keys or the display, with audio feedback for navigation and transaction management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a touch-sensitive display is used without tactile feedback, then the device complexity is reduced, but the ease of operation deteriorates for visually impaired users
Solution Approach 1:
The patent combines a physical keypad with a touch-sensitive display into a unified interface. The physical keypad provides tactile feedback for visually impaired users while the touch-sensitive display provides visual feedback for users with sight. Both input methods are merged into a single system that processes inputs from either source, resolving the contradiction between device simplicity and accessibility.
Solution Approach 2:
The interface is designed to accept and process inputs from multiple sources (physical keypad and touch-sensitive display) in the same manner. The system universally handles both tactile and visual interaction modes, allowing the same device to serve users with different visual abilities without requiring separate systems.
2Ease of operation
If audio feedback is used to list all options, then the ease of operation improves for visually impaired users, but the loss of information increases as users may forget options by the end of the list
Solution Approach 1:
The patent segments the interface into multiple modalities (visual display, audio feedback, tactile keypad) rather than relying on a single exhaustive audio list. Users can see options displayed on the screen or touch the physical keys, breaking the information delivery into manageable segments that don't require memorizing long audio sequences.
Solution Approach 2:
The physical keypad acts as an intermediary between the system and the user. Instead of requiring users to remember all audio-listed options, they can directly touch the physical keys corresponding to their desired actions. The physical keypad mediates the interaction by providing direct tactile access to functions without requiring auditory memory.
3Ease of operation
If a physical keypad is provided for tactile feedback, then the ease of operation improves for visually impaired users, but the device complexity increases
Solution Approach 1:
The patent merges the physical keypad and touch-sensitive display into a single integrated interface system. Rather than adding a separate complex system for tactile input, the physical keypad is combined with the existing display system, sharing common processing and control logic, thereby minimizing the increase in overall device complexity.
Data Source
AI summary
A user interface comprising: (i) a physical keypad comprising a plurality of keys, and (ii) a touch-sensitive display for presenting a screen. The screen comprises: (a) an image illustrating the physical keypad; and (b) a transaction option depicted on one of the keys of the physical keypad. A user is able to select the transaction option either by pressing the transaction option on the touch-sensitive display or by pressing a physical key corresponding to the key on which the transaction option is depicted.