Touchscreen Password Input via Haptic Feedback
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Solution Overview
Problem
Conventional touch sensitive password input devices lack security for visually impaired users, as they cannot accurately determine the pressed keys without audible feedback, making the input operation insecure.
Innovation Solution
A password input method using a microprocessor that monitors touch positions, records finger displacements, and applies data processing to identify numerals without displaying Braille characters, ensuring secure input by using indication signals for confirmation and cancellation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If audible feedback is provided to help visually impaired persons identify pressed keys, then ease of operation is improved, but security deteriorates because bystanders can also hear the password
Solution Approach 1:
The patent introduces vibration feedback as an intermediary mechanism that provides tactile information to the user without producing audible sound. The vibration pattern conveys key press confirmation to the visually impaired user through haptic feedback, eliminating the need for audible feedback while maintaining ease of operation and preserving security.
2Ease of operation
If Braille characters are displayed on the touchscreen to assist visually impaired persons, then ease of operation is improved, but security deteriorates because the password becomes visible
Solution Approach 1:
The patent replaces the visual Braille character display mechanism with a tactile vibration feedback mechanism. Instead of using visual information (Braille characters on screen), the system uses mechanical vibration to convey input confirmation to the user, eliminating visual exposure of the password while maintaining accessibility for visually impaired persons.
3Reliability
If no feedback mechanism is provided on the touchscreen, then security is maintained, but ease of operation deteriorates because visually impaired persons cannot identify pressed keys
Solution Approach 1:
The patent introduces vibration feedback as an intermediary that bridges the gap between security and accessibility. The vibration mechanism provides necessary tactile feedback to visually impaired users without compromising security, as it communicates input status through haptic sensation rather than visual or audible channels that could be observed by others.
Data Source
AI summary
A password input method is disclosed. The password input method is conducted by a microprocessor of a touch sensitive password input device, wherein the touch sensitive password input device comprises a touchscreen and a circuit, and the circuit comprises a memory and the microprocessor. In case of the password input method according to the present invention being conducted, the touch sensitive password input device is controlled to guide a visually impaired person to successfully complete a password input operation with high security.