RGBW Pixel Array Odd-Even Column Polarity Alternation
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Solution Overview
Problem
Liquid crystal display pixel arrays with RGBW sub-pixels experience crosstalk due to adjacent sub-pixels having the same polarity, leading to changes in picture brightness and color distortion, particularly in specific picture patterns.
Innovation Solution
A pixel array is arranged with color sub-pixels and white sub-pixels in a two-dimensional array, where sub-pixels with the same color are alternately positioned in odd-numbered and even-numbered columns to ensure that adjacent sub-pixels have different polarities, preventing crosstalk by alternating their drive polarities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a pixel array with RGBW sub-pixels is used to increase brightness, then illumination intensity is improved, but crosstalk occurs between adjacent sub-pixels causing picture brightness changes and color distortion
Solution Approach 1:
The patent applies local quality by differentiating the arrangement patterns of different sub-pixel types. Color sub-pixels (R, G, B) are arranged in alternating odd-even column patterns to prevent crosstalk, while white sub-pixels are positioned in specific columns to maximize brightness. This localized differentiation of arrangement strategies resolves the contradiction between brightness enhancement and crosstalk prevention.
Solution Approach 2:
The patent resolves the crosstalk issue by transitioning from a simple linear arrangement to a two-dimensional grid structure with alternating odd-even column patterns. This dimensional approach allows adjacent sub-pixels to have opposite polarities in the column direction while maintaining proper color sequencing, thereby preventing crosstalk while preserving the RGBW brightness enhancement.
2Device complexity
If adjacent sub-pixels have the same polarity to simplify drive, then device complexity is reduced, but crosstalk occurs leading to picture brightness changes
Solution Approach 1:
The patent implements periodic action through alternating polarity patterns in the drive scheme. Adjacent sub-pixels in odd and even columns are driven with opposite polarities, creating a periodic alternation that prevents crosstalk. This periodic drive pattern maintains reliability of picture brightness while managing drive complexity through a systematic alternating approach.
3Manufacturing precision
If color sub-pixels are arranged in traditional RGB sequence, then manufacturing precision is maintained, but crosstalk occurs between same-color adjacent sub-pixels
Solution Approach 1:
The patent applies asymmetry by breaking the traditional symmetric RGB arrangement pattern. Instead of uniform sequential arrangement, color sub-pixels are positioned in asymmetric odd-even column patterns, creating an asymmetric layout that prevents same-color sub-pixels from being adjacent. This asymmetric arrangement maintains manufacturing precision while eliminating crosstalk.
Data Source
AI summary
A pixel array and a display device are provided. The pixel array includes a two-dimensional array that is formed by arranging a plurality of color sub-pixels and a plurality of white sub-pixels in the row direction and in the column direction, the color sub-pixels include color sub-pixels in three different colors. For color sub-pixels in each color in each row, color sub-pixels with the same color in the same row are arranged so that, the odd-numbered column sub-pixel and the even-numbered column sub-pixel alternate one by one, or they are disposed by way of groups each including two odd-numbered column sub-pixels alternating with even-numbered column sub-pixels or by way of groups each including two even-numbered column sub-pixels alternating with odd-numbered column sub-pixels.