Virtual Keyboard Color Coding for Secure Password Entry
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Solution Overview
Problem
Existing digital broadcast receivers face challenges in providing an intuitive and secure graphical user interface for users to easily enter information, particularly in preventing password exposure when using virtual keyboards on screen displays.
Innovation Solution
A digital broadcast receiver system that displays virtual keys differently from regular keys, using indicators and color variations to obscure password entry, allowing users to select virtual keys through arrow and selection commands, and automatically changing key layouts to enhance security and usability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If virtual keys are displayed clearly on the screen for easy user input, then ease of operation is improved, but security deteriorates because password exposure becomes possible
Solution Approach 1:
The patent applies color changes by displaying virtual keys in different colors based on their state. Selected keys are highlighted with a distinct color (e.g., yellow background with black text) while unselected keys remain in a different color (e.g., black background with white text). This visual differentiation through color changes enables users to easily track which keys have been selected without exposing the actual password characters, thus improving ease of operation while maintaining security.
2Device complexity
If all virtual keys are displayed in the same way, then device complexity is reduced, but ease of operation deteriorates because users cannot easily distinguish selected keys
Solution Approach 1:
The patent applies local quality by giving different visual properties to different parts of the virtual keyboard based on their selection state. Each virtual key's appearance is locally modified according to whether it has been selected or not, with selected keys receiving distinctive visual treatment (different background color, text color, or both). This localized differentiation maintains overall GUI simplicity while enabling users to easily distinguish selected keys from unselected ones.
Data Source
AI summary
A digital broadcast receiver may display virtual keys on a screen, the virtual keys may be provided in a plurality of regions, each region having an identifier and characters that are unique from other regions. The digital broadcasting receiver may receive at least one input corresponding to selection of the identifier for selection of a desired character, wherein the desired character and at least one other character in a different region are displayed differently on the screen.