Handwriting Input Device with Dynamic Display Segmentation
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Solution Overview
Problem
Handwriting input devices used for authentication purposes face security issues due to visible display of input content, which can be compromised by others recognizing the handwriting, and existing methods either lack visibility for the user or fail to securely erase the input.
Innovation Solution
A handwriting input device that displays only a predetermined length of handwriting from the starting point to the present input point, with options to erase the displayed handwriting based on predetermined conditions such as length or completion of input, thereby maintaining user visibility while securing the input content from unauthorized recognition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the entire handwriting is displayed on the display unit, then the user can visually confirm the input contents, but the security is compromised because anybody else can recognize the handwriting
Solution Approach 1:
The patent divides the displayed handwriting into segments by displaying only a predetermined length portion from the starting point to the present input point, while erasing the rest. This segmentation allows the user to see the current input state without exposing the complete handwriting that could be recognized by others, thus resolving the contradiction between visual confirmation and security.
2Object-affected harmful factors
If the handwriting is not displayed at all, then the security is maintained, but the user cannot visually recognize whether input is received or collectively recognized
Solution Approach 1:
Instead of displaying the complete handwriting (excessive action) or nothing at all (no action), the patent applies partial action by displaying only a predetermined length portion of the handwriting from the starting point to the present input point. This partial display provides enough visual information for the user to confirm input receipt while limiting the exposure of recognizable handwriting content, thus resolving the contradiction between security and input confirmation.
3Object-affected harmful factors
If the displayed handwriting is erased after a predetermined time, then the security is improved, but the user cannot confirm the input contents in time
Solution Approach 1:
The patent makes the display dynamic by continuously updating the displayed portion based on the present input point. As the user writes, the displayed handwriting dynamically extends from the starting point to the current position, allowing real-time visual confirmation. The system automatically erases the displayed handwriting after a predetermined time, creating a dynamic display that provides timely confirmation while maintaining security.
Data Source
AI summary
A handwriting input device accepts an input of a handwriting; and allows a display unit to display a handwriting with a predetermined length from a starting point to a present input point from among handwritings received by the reception unit at a present input point.