Display Panel Driving Method for Static Image Sticking Prevention
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Solution Overview
Problem
Display panels face challenges in minimizing power consumption while maintaining display quality, particularly when showing static images, as low-frequency driving can lead to image sticking due to slow liquid crystal response times.
Innovation Solution
A method of determining whether input image data represents a video or static image, and inserting image sticking compensation frames between normal frames during low-frequency driving, with the polarity of the display panel inverted and the number of compensation frames adjusted to prevent image sticking, and data signals adjusted to ensure proper charging and reduce flicker.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by stationary object
If the display panel is driven at a low frequency to reduce power consumption, then power consumption is reduced, but image sticking occurs due to insufficient charging time
Solution Approach 1:
The patent applies periodic action by inserting image sticking compensation frames periodically between normal frames during low frequency driving. The compensation frames are inserted based on detected image transitions, creating a periodic correction mechanism that prevents image sticking while maintaining low frequency operation for power savings.
Solution Approach 2:
The patent applies preliminary action by detecting image transitions in advance and proactively inserting compensation frames before image sticking can occur. The system monitors input image data for transitions and prepares compensation frames ahead of time, ensuring prevention rather than correction of the image sticking issue.
2Reliability
If image sticking compensation frames are inserted to prevent image sticking, then display quality is improved, but device complexity increases
Solution Approach 1:
The patent applies feedback by continuously monitoring input image data for transitions and using this information to control the insertion of compensation frames. The system detects whether an image transition has occurred and adjusts the frame sequence accordingly, creating a closed-loop control mechanism that manages complexity through intelligent decision-making rather than hardware complexity.
Solution Approach 2:
The patent applies the intermediary principle by introducing compensation frames as intermediate elements between normal display frames. These compensation frames act as mediators that resolve the conflict between low frequency driving and image sticking prevention, managing the transition between states without requiring complex hardware modifications.
3Object-affected harmful factors
If the display panel is driven at a lower frequency to reduce flicker, then flicker is reduced, but image sticking occurs more frequently
Solution Approach 1:
The patent applies local quality by applying different driving strategies to different portions of the frame sequence. Normal frames are driven at low frequency to minimize flicker, while compensation frames are inserted locally at specific points where image transitions occur to prevent image sticking. This localized approach allows simultaneous optimization for both flicker reduction and image sticking prevention.
Data Source
AI summary
A method of driving a display panel is proposed. The method includes determining whether an input image data represents a video image or a static image, determining whether an image transition occurs in the input image data when the input image data represents the static image, and inserting a plurality of image sticking compensation frames between normal frames in a low frequency driving when the image transition occurs in the input image data between the normal frames. The number of the image sticking compensation frame may be properly adjusted during a cycle of low frequency driving.