Tab Menu Locking During Backlight-Off Display Recovery
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Solution Overview
Problem
Existing multi-function peripherals (MFPs) do not clearly specify conditions for restoring backlight after a period of inactivity, potentially leading to security vulnerabilities when personal tabs are displayed without authentication.
Innovation Solution
Implement a control apparatus with a locking mechanism that sets menu screens to a locked state when the backlight is turned off, based on pre-set lock settings for each tab, ensuring secure display only when authentication is provided.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the backlight is turned off after a period of inactivity to reduce power consumption, then energy efficiency is improved, but security deteriorates because the personal tab may be displayed without authentication when the backlight is restored
Solution Approach 1:
The system performs preliminary authentication checks before restoring the display after backlight timeout. The locking control unit determines whether authentication is required based on the tab state before backlight off, and the display control unit only restores the personal tab after confirming authentication validity, thus preventing unauthorized access while maintaining power efficiency
Solution Approach 2:
The system dynamically adjusts the display restoration behavior based on the tab state. When a personal tab is active, the system requires authentication before restoring display; when common tabs are active, display is restored normally. This dynamic conditional approach balances security requirements with user convenience and power management
2Ease of operation
If the personal tab is displayed without clear backlight restoration conditions, then user convenience is improved, but security deteriorates due to potential unauthorized access
Solution Approach 1:
The system applies different display restoration rules to different tab types. Personal tabs require authentication before restoration while common tabs can be restored without authentication. This localized differentiation of access control policies maintains user convenience for public functions while securing personal data access
Solution Approach 2:
The system uses feedback from the tab state before backlight timeout to control display restoration. The locking control unit monitors which tab was active and uses this information to determine authentication requirements, creating a closed-loop security mechanism that adapts to the current operational context
Data Source
AI summary
A control apparatus includes: a display-control-unit that can display on a displayer a screen in the form of tabs including tabs and corresponding menus, and that displays on the displayer a screen including a menu corresponding to a predetermined tab in accordance with selection of the predetermined tab on the screen; a locking-control-unit that locks a menu corresponding to at least one tab out of the menus corresponding to the tabs such that no menu is displayed; and a setting-unit that sets whether to make lock setting effective or ineffective, in which if the condition that a backlight of the displayer is turned off is satisfied, based on that lock setting of a menu corresponding to a current tab that is displayed last before the backlight is turned off is set to effective, the locking-control-unit locks the menu corresponding to the current tab.