Pixel Matrix Driving Method for 4-Domain VA Display
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
4-domain VA-type liquid crystal display panels suffer from color washout and poor display effects at large viewing angles, leading to distorted images and issues like crosstalk and bright dark lines due to sub-pixel polarity affecting the display performance.
Innovation Solution
A method for driving a pixel matrix where voltages applied along data lines change polarity once every four or two sub-pixels, with specific polarity control and alternating loading of high and low gray scale voltages to prevent polarity-induced issues, improving display quality by avoiding crosstalk and bright dark lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If 4-domain VA technology is used to improve brightness output and contrast, then display performance is improved, but color washout occurs at large viewing angles and sub-pixel polarity causes crosstalk and bright dark lines
Solution Approach 1:
The patent divides the pixel matrix into multiple groups based on data line positions and applies different polarity patterns to each group. Specifically, data lines are divided into first data lines and second data lines, with different polarity inversion schemes applied to reduce crosstalk and color washout while maintaining brightness output.
Solution Approach 2:
The patent applies different polarity control strategies to different regions of the display. First data lines use one polarity pattern while second data lines use another, allowing local optimization of display quality in different areas to prevent color washout and crosstalk while maintaining overall brightness performance.
2Illumination intensity
If 4-domain VA technology is used to improve contrast, then display performance is improved, but sub-pixel polarity affects display performance causing crosstalk and bright dark lines
Solution Approach 1:
The patent segments the data lines into first and second data lines with different polarity inversion patterns. This segmentation allows independent control of polarity effects in different regions, reducing crosstalk between sub-pixels while maintaining the high contrast performance of 4-domain VA technology.
Solution Approach 2:
The patent inverts the polarity of driving voltages in specific patterns across different data line groups. By applying polarity inversion strategically to first and second data lines, the patent counteracts the polarity-induced crosstalk and bright dark line effects while preserving contrast performance.
3Object-affected harmful factors
If voltage polarity is changed frequently to prevent polarity effects, then display quality is improved, but driving complexity increases
Solution Approach 1:
The patent divides data lines into first and second groups with different polarity patterns, creating a systematic approach to polarity management. This segmentation simplifies the control logic compared to individual pixel control while effectively reducing color washout and crosstalk through coordinated polarity inversion across groups.
Data Source
AI summary
A method for driving a pixel matrix is provided, and the pixel matrix includes multiple sub-pixels arranged in a matrix. Voltages applied along any one of data lines change in polarity once every four sub-pixels or every two sub-pixels, any one of the data lines controls voltage inputs of sub-pixel respectively connected to two sides thereof or controls voltage inputs of two sub-pixels both connected to one side thereof. The method includes: receiving an image data and acquiring original pixel data according to the image data; generating a first driving voltage and a second driving voltage according to the original pixel data; and loading the first driving voltage or the second driving voltage to the pixel matrix along any one of the data lines. The invention also provides a display device corresponding to the method. The invention can avoid crosstalk, bright dark lines and improve display effect.