Zigzag Color Filter Arrangement for LCD Definition
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Solution Overview
Problem
The sub-pixel rendering method applied to liquid crystal display devices with a red, green, blue, and white stripe arrangement leads to deteriorated definition and line dim issues due to increased distance between same-color sub-pixels and adjacent arrangement in the vertical direction.
Innovation Solution
A liquid crystal display device and driving method that arrange red, green, blue, and white color filters in a zigzag pattern, compensating red, green, and blue data signals by dividing input data into odd and even horizontal lines and generating pseudo data to re-arrange it into a suitable format for the panel, reducing the distance between same-color sub-pixels and enhancing picture quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If a red, green, blue, and white stripe arrangement is used with sub-pixel rendering, then the number of sub-pixels is reduced to 3/2 and aperture ratio is increased, but the distance between same-color sub-pixels is lengthened by 3/4 and line dim appears
Solution Approach 1:
The patent applies asymmetry by arranging color filters in different patterns for odd and even horizontal lines. Odd lines use one color sequence while even lines use a different sequence, creating an asymmetric overall pattern that prevents regular line dim while maintaining sub-pixel rendering benefits
Solution Approach 2:
The patent transitions from a simple linear stripe arrangement to a two-dimensional zigzag pattern by alternating color sequences between odd and even horizontal lines. This dimensional change in the arrangement pattern allows same-color sub-pixels to be positioned more closely while maintaining the RGBW stripe structure
2Productivity
If same color sub-pixels are arranged adjacently in vertical direction in RGBW stripe arrangement, then sub-pixel rendering can be applied, but definition deteriorates and line dim appears
Solution Approach 1:
The patent creates asymmetric color arrangements between odd and even horizontal lines, where the vertical adjacency of same-color sub-pixels is broken by the alternating patterns. This asymmetry prevents the formation of visible line dim while preserving sub-pixel rendering functionality
Solution Approach 2:
The patent introduces a zigzag arrangement pattern that curves the traditional linear stripe layout. This curved/zigzag pattern redistributes same-color sub-pixels in a non-linear fashion, reducing their distance while preventing regular vertical alignment that causes line dim
Data Source
AI summary
A liquid crystal display device is disclosed. The liquid crystal display device includes: a liquid crystal display panel configured to include color filters arranged to have different color arrangement in odd and even horizontal lines, and to display an image; an input portion configured to input data for pixels opposite to the color filters of the odd and even numbered horizontal lines; a data converter configured to compensate for the input data from the input portion using rendering filter values which are differently set according to the odd and even horizontal lines; a controller configured to re-arrange the compensated data from the data converter into a suitable format for the liquid crystal display panel; and a data driver configured to apply the re-arranged data from the controller to the liquid crystal display panel and drive the liquid crystal display panel.