Liquid Crystal Display Panel Subpixel Polarity Alternation
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Solution Overview
Problem
Liquid crystal display panels suffer from color crosstalk due to asymmetric coupling effects of data lines on subpixels, leading to color changes in gray-scale representations and inefficient charging of solid-colored screens.
Innovation Solution
The liquid crystal display panel design includes subpixels with same colors in each column, where polarities are alternated every k rows, and data lines on both sides of a column transmit data voltages with opposite polarities, connecting every two data lines with the same polarity to offset coupling effects and prevent color crosstalk.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If traditional stripe structures with single data line connection per sub pixel are used, then device complexity is reduced, but color crosstalk occurs due to asymmetric coupling effects
Solution Approach 1:
The patent applies asymmetry by connecting data lines to sub pixels in a non-uniform pattern. Specifically, odd-numbered data lines connect to sub pixels of one polarity while even-numbered data lines connect to sub pixels of opposite polarity, creating an asymmetric connection structure that balances coupling effects and eliminates color crosstalk.
Solution Approach 2:
The patent converts the harmful asymmetric coupling effect into a beneficial symmetric coupling effect. By deliberately designing the data line connection pattern to alternate polarities, the previously harmful asymmetric coupling is transformed into a balanced symmetric coupling that cancels out color crosstalk while maintaining display performance.
2Object-affected harmful factors
If data lines transmit different polarities to adjacent sub pixels, then color crosstalk is reduced, but device complexity increases due to additional connection requirements
Solution Approach 1:
The patent merges the polarity control function into the existing data line structure by alternating connections. Instead of adding separate control lines for polarity switching, the design combines polarity management with the standard data line routing, where adjacent data lines naturally carry opposite polarities through their connection patterns to sub pixels.
3Speed
If liquid crystal molecules are held at fixed voltage continuously, then response speed is improved, but liquid crystal characteristics deteriorate over time
Solution Approach 1:
The patent implements periodic action by alternating the polarity of voltages applied to liquid crystal molecules between frames. Instead of maintaining a fixed voltage polarity continuously, the system periodically inverts polarities (e.g., positive in one frame, negative in the next), which prevents degradation of liquid crystal characteristics while maintaining fast response performance.
Data Source
AI summary
The present application provides a liquid crystal display panel and a display device. The liquid crystal display panel includes a plurality of scanning lines, a plurality of data lines, and a plurality of sub pixels. Wherein colors of the sub pixels in each column are same; polarities of the sub pixels in each column are changed every k rows, and polarities of two adjacent ones of the sub pixels in each row are opposite; and every two of the data lines transmitting data voltages with same polarities and electrically connected to the sub pixels of a same color are connected together, and k and n are integers greater than or equal to 1.