Pixel Structure Driving Method for LCD Vertical Strip Elimination
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Solution Overview
Problem
High-definition LCD displays face challenges in achieving uniform luminance across different gray values of positive and negative polarities, leading to vertical strips in still images due to asymmetric common electrode lines.
Innovation Solution
A pixel structure driving method that adjusts the gray values of sub-pixels by determining the polarity of each data line, performing a value look-up process, and adjusting the luminance of high and low gray values to ensure symmetry between positive and negative polarities, thereby eliminating vertical strips.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If high/low gray values are used to replace pixel values to increase display quality, then the display quality is improved, but vertical strips occur in still images due to asymmetric common electrode lines
Solution Approach 1:
The patent applies parameter changes by adjusting the gray values of sub-pixels based on their polarity (positive or negative). Specifically, it determines whether each sub-pixel should use a first gray value or a second gray value from a lookup table, depending on the polarity of its common electrode line. This polarity-based parameter adjustment compensates for the asymmetric characteristics of the common electrode lines, ensuring uniform luminance output and eliminating vertical strips while maintaining high display quality.
2Manufacturing precision
If more pixels are integrated in a limited size of glass substrate to achieve high definition, then the resolution is improved, but the manufacturing process becomes more difficult
Solution Approach 1:
The patent applies local quality by treating different sub-pixels differently based on their specific characteristics (polarity). Instead of using a uniform driving approach for all pixels, it individually adjusts the gray values for positive and negative polarity sub-pixels according to their specific luminance characteristics. This localized adjustment ensures optimal display quality for each sub-pixel while managing the complexity of high-resolution manufacturing processes.
Data Source
AI summary
A pixel structure driving method and a display device are provided. The driving method includes obtaining a polarity of each of the data lines of a current frame, determining a polarity of each of the sub-pixels according to the polarity of each of the data lines and an arrangement of the pixel structure, performing a value look-up process according to a polarity and an initial gray value of each of the sub-pixels to obtain a polarity high/low gray value of each of the sub-pixels, if a luminance of a high gray value of a positive polarity of a sub-pixel of a color is different from a luminance of a high gray value of a negative polarity of the sub-pixel of the color, adjusting the polarity high/low gray value of the sub-pixel. In this way, the occurrence of vertical strips in a still image could be alleviated.