Self-Centering Touchscreen Keypad for Accessible PIN Entry
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Solution Overview
Problem
Existing payment systems, particularly point-of-sale (POS) devices, pose challenges for visually impaired individuals when inputting personal identification numbers (PINs) using touchscreen displays, as they struggle to identify the location of numbers, leading to difficulties in conducting transactions.
Innovation Solution
A self-centering user interface is implemented, where the keypad is configured in a specific shape (e.g., circle, square) with numbers arranged around a central point, allowing the device to determine the user's input based on swipes and releases, enabling the keypad to be centered around the user's input location on the touchscreen, facilitating PIN entry without visual reliance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a traditional keypad layout is used on a touchscreen display, then the device structure remains simple, but visually impaired users cannot locate the numbers, making operation difficult
Solution Approach 1:
The keypad dynamically repositions itself based on the user's touch location. When a user touches the screen, the keypad centers around that location, allowing visually impaired users to interact with the interface through directional swipes without needing to visually locate specific numbers.
Solution Approach 2:
The system automatically determines the user's intent based on swipe direction and repositions the keypad accordingly, eliminating the need for visual guidance or manual adjustment of keypad position.
2Ease of operation
If the keypad is fixed in position on the touchscreen, then the interface is simple to implement, but visually impaired users cannot locate numbers without visual feedback
Solution Approach 1:
The keypad transitions from a static to a dynamic position based on user interaction. The system detects touch location and swipe direction, then repositions the keypad to center around the user's input location, enabling operation without visual feedback.
3Adaptability or versatility
If a self-centering keypad is implemented to help visually impaired users, then operation accessibility improves, but the software complexity increases
Solution Approach 1:
The keypad adapts its position dynamically based on user touch location and swipe direction, providing accessibility for visually impaired users through automatic repositioning rather than requiring complex additional input methods.
Data Source
AI summary
Techniques described herein are directed to, among other things, utilizing a self-centering user interface to receive information associated with a transaction. For instance, a computing device may receive a first input at a first location of a display. The computing device may then determine a positioning for the user interface, where the user interface may be substantially centered about the first location. In some instances, the computing device may display the user interface using the positioning. The computing device may then receive a second input corresponding to swipe from the first location of the display to a second location of the display. The computing device may then determine a symbol included in the user interface based at least in part on the second input. In some instances, the user interface includes a keypad for entering a personal identification number associated with a payment instrument.