Display Panel Driving Method for Nodding Line Reduction
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Solution Overview
Problem
The existing triple gate (Tri-Gate) driving architecture combined with 4 domain vertical alignment (4 Domain VA) technology and angle of view improvement algorithm results in severe nodding lines on the display screen due to conflicts between the angle compensation method and the Tri-Gate driving architecture.
Innovation Solution
A driving method for a display panel that involves alternately arranging first and second data lines and sub-pixel groups, with sub-pixels in each frame exhibiting either high or low grayscale data compensation states and positive or negative polarities. This design ensures that at least one sub-pixel in each pair of adjacent sub-pixel columns with the same display color and high grayscale data compensation state has a different polarity, reducing polarity differences and nodding lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the Tri-Gate driving architecture is paired with the angle of view improvement algorithm, then the image quality is improved, but severe nodding lines appear on the display screen
Solution Approach 1:
The patent applies different grayscale data compensation states to different sub-pixel groups based on their local characteristics. Specifically, it divides sub-pixel columns into odd and even columns, and applies high grayscale data compensation state to some sub-pixel groups while applying low grayscale data compensation state to others, creating local variations in compensation to eliminate the nodding lines caused by uniform compensation
Solution Approach 2:
The patent introduces asymmetric polarity assignment where sub-pixels in different sub-pixel groups have different polarities (positive or negative). By making the polarity distribution asymmetric across adjacent sub-pixel columns and using odd numbers of sub-pixels in certain groups, it breaks the symmetry that causes nodding lines while maintaining overall display quality
2Object-affected harmful factors
If sub-pixels with high grayscale data compensation state are distributed evenly across sub-pixel columns, then nodding lines are reduced, but the driving complexity increases
Solution Approach 1:
The patent segments the display panel into distinct sub-pixel groups with different characteristics. It divides sub-pixel columns into odd and even columns, and further divides each into first and second sub-pixel groups, allowing independent control and compensation strategies for each segment. This segmentation simplifies the overall control by breaking down the complex compensation problem into manageable segments
Solution Approach 2:
The patent implements periodic polarity reversal where the polarity of sub-pixels is flipped between different frames. By establishing a periodic pattern in polarity assignment and compensation state distribution, it simplifies the driving logic while maintaining effective nodding line reduction, as the periodic nature creates predictable patterns that are easier to control
Data Source
AI summary
A driving method for a display panel, a driving chip, and a display device are provided. By driving sub-pixels for display across multiple frames, and ensuring each sub-pixel in every frame possesses either a high or low grayscale data compensation state, and either a positive or negative polarity, it's ensured that within the same frame, among the sub-pixels with the same display color and in the high grayscale data compensation state in two neighboring sub-pixel columns, at least one sub-pixel has a different polarity from the others. Under the Tri-Gate driving architecture, pixel polarities flip at intervals of an odd number of sub-pixels in each pixel column. This reduces polarity differences between the sub-pixels with the same display color and in the high grayscale data compensation state in four adjacent sub-pixel columns. This improves the perception of brightness changes when head movement occurs and reduces the risk of nodding lines.