Mobile Display Position Shifting to Prevent Image Sticking
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Solution Overview
Problem
Image sticking phenomenon occurs on mobile terminal displays when images are consistently displayed for a long period, leading to reduced light emission efficiency in AMOLED displays and liquid crystals becoming fixed in TFT-LCDs.
Innovation Solution
A control apparatus and method for a mobile terminal that includes a controller to turn off the display unit, move the display position of items, and re-display them at the new position when the unit is turned back on, using techniques such as counting turn-off cycles, displaying partial items, and adjusting positions based on screen orientation and user interaction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If items are consistently displayed at a fixed position on the display unit for a long period of time, then the display function is stable and simple, but image sticking phenomenon occurs leading to reduced light emission efficiency in AMOLED displays and liquid crystal fixation in TFT-LCDs
Solution Approach 1:
The patent applies the dynamics principle by making the display position of items changeable rather than fixed. The controller automatically adjusts the display position of items (such as status icons) to different locations on the display unit at predetermined time intervals, preventing static image formation that causes burning effects in AMOLED and liquid crystal fixation in TFT-LCD displays.
Solution Approach 2:
The patent implements periodic action by automatically changing the display position of items at predetermined time intervals. This periodic repositioning ensures that no single area of the display remains static for too long, effectively preventing image sticking while maintaining display functionality.
2Object-affected harmful factors
If the display position of items is frequently changed to prevent image sticking, then image sticking is reduced, but user experience deteriorates due to items moving around
Solution Approach 1:
The patent uses periodic action with predetermined time intervals to change display positions, ensuring changes occur infrequently enough to maintain user familiarity while sufficiently often to prevent image sticking. This balanced approach resolves the contradiction between preventing damage and maintaining usability.
Solution Approach 2:
The controller predicts when image sticking may occur based on display duration and proactively repositions items before damage occurs, rather than waiting for visible degradation. This preliminary action prevents the harmful effect while maintaining stable display during normal use periods.
Data Source
AI summary
The present invention relates to a mobile terminal and a method for controlling the same which can effectively reduce an afterimage phenomenon generated on a display unit. A control apparatus of a mobile terminal for reducing an afterimage of a display unit of the mobile terminal according to embodiments of the present invention may comprise: the display unit for displaying items in a turned-on state; and a control unit for turning off the display unit after displaying the items on the display unit, moving display locations of the items displayed on the display unit in the turned-on state in a state where the display unit is turned off, and displaying the items in the moved display locations when the display unit is turned back on.