Foldable OLED Burn-in Mitigation via Dynamic Gap Patterns
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Solution Overview
Problem
Foldable displays, particularly those using OLED technology, are susceptible to screen burn-in due to prolonged display of static content, which can lead to permanent imprinting and reduced image quality.
Innovation Solution
A foldable Information Handling System (IHS) with a logic unit and processor that determines the device's posture and content to display, selects a pattern to create a gap between screen portions, and periodically modifies this pattern to prevent permanent imprinting, using a cyclic buffer synchronized with the frame refresh rate and imperceptible to the user.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If a static pattern is displayed to create a gap between screen portions, then the gap is clearly visible and maintains proper spacing, but screen burn-in occurs due to prolonged display of the same static content
Solution Approach 1:
The patent applies periodic action by dynamically changing the gap pattern at regular intervals. The processor periodically modifies the pattern displayed in the gap region between screen portions, ensuring that no static content remains displayed for extended periods. This periodic modification prevents pixel burn-in while maintaining the visual function of the gap throughout device operation.
Solution Approach 2:
The patent implements dynamics by transitioning from a static gap pattern to a dynamic one. The gap pattern is continuously or periodically modified to different configurations, making the gap region adaptive rather than fixed. This dynamic approach allows the gap to maintain its spacing function while avoiding the harmful effects of static display content on OLED pixels.
2Object-affected harmful factors
If the gap pattern is periodically modified to prevent burn-in, then screen burn-in is mitigated, but the pattern modification may become perceptible to users
Solution Approach 1:
The patent applies parameter changes by modifying specific attributes of the gap pattern such as color, transparency, or geometric configuration within a controlled range. These parameter modifications are designed to be subtle enough to remain imperceptible to users while sufficient to prevent pixel burn-in. The system adjusts pattern parameters dynamically without creating noticeable visual artifacts or disrupting user experience.
3Reliability
If the display is used for prolonged periods showing static content, then the device provides stable and reliable visual output, but permanent imprinting occurs on the display pixels
Solution Approach 1:
The patent implements periodic action by systematically refreshing or modifying the gap pattern at predetermined intervals during display operation. This periodic modification ensures that even during prolonged operational periods, no static content remains fixed on the display long enough to cause permanent pixel imprinting. The system maintains reliable visual output while extending the safe operational duration of the display.
Data Source
AI summary
Certain IHSs (Information Handling Systems) may utilize displays that are foldable. Foldable displays may utilize OLED (organic light-emitting diode) display technology, which is particularly susceptible to screen burn-in. Embodiments implement procedures for mitigation of screen burn-in of a foldable display. When folded, a foldable display is logically divided into screen portions based on the locations of the folds. Embodiments mitigate screen burn-in separately in each these screen portions that are created by folding the display. A gap may be displayed along the length of the folds of a folded display, thus separating the different screen portions. Embodiments may implement procedures for mitigating screen burn-in from displaying such a gap. Embodiments may also determine screen portions of a folded display that are actively in use and may implement procedures for mitigating screen burn-in in inactive portions of the folded display.