OLED Display Burn-In Prevention via Dynamic Image Repositioning
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
OLED displays are susceptible to burn-in when displaying static images for extended periods, especially with the Always-On Display (AOD) function, leading to permanent pixel discoloration.
Innovation Solution
An electronic device with a processor that analyzes image features to determine movement range, interval, and period, and a display driver circuit that changes the image location within the display based on these parameters, even when the processor is partially deactivated, to prevent burn-in.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an Always-On Display function is implemented to show static images continuously, then the display remains operational and informative during sleep mode, but the pixels are subjected to continuous stress causing burn-in and permanent discoloration
Solution Approach 1:
The patent applies the Dynamics principle by making the previously static image moveable. The image is divided into multiple segments that can be repositioned to different locations on the display screen over time. This dynamic repositioning prevents any single pixel or pixel group from being continuously stressed in the same location, thereby preventing burn-in while maintaining the Always-On Display functionality.
Solution Approach 2:
The patent implements Periodic action by systematically changing the image position at predetermined time intervals. The display controller moves the image to different locations periodically, ensuring that no pixel remains in a constant state for extended periods. This periodic repositioning distributes the stress across different pixel regions, preventing permanent discoloration while keeping the display active.
2Object-affected harmful factors
If the processor remains fully active to manage dynamic image display, then burn-in is prevented, but power consumption increases
Solution Approach 1:
The patent applies Segmentation by dividing the image into multiple separable segments or portions. The display controller can manipulate these segments independently, moving them to different positions on the screen. This segmentation allows the system to pre-process image data during active periods and then display the segmented content with minimal processor intervention during sleep mode, reducing power consumption while maintaining burn-in prevention.
Solution Approach 2:
The patent implements Self-service by enabling the display controller to autonomously manage image repositioning without continuous processor involvement. Once the processor provides the segmented image data and initial positioning parameters, the display controller independently executes the periodic repositioning operations, managing the burn-in prevention function without requiring sustained high-power processor operation.
Data Source
AI summary
An electronic device includes a display, a display driver integrated circuit (DDI) electrically coupled with the display, a memory that stores an image, and a processor. The processor is configured to analyze at least one feature of the image and to determine at least one of a movement range, a movement interval, and a movement period of the image based on the at least one feature. The DDI is configured to display the image in the display when at least part of the processor is deactivated, and to change a display location of the image within the movement range depending on the movement interval and the movement period.