Pixel Group Driving Method for VA Display Color Shift
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Large-size VA liquid crystal display panels suffer from color shift phenomena at larger viewing angles due to capacitance-resistance effects when data lines frequently switch between high and low voltages, affecting display quality.
Innovation Solution
A driving method for display panels where adjacent sub-pixels are driven with target high and low voltage data, minimizing frequent voltage switching at the sub-pixel level by switching in units of pixel groups, thereby reducing signal distortion and improving display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If data lines frequently switch between high and low voltages at sub-pixel level, then different driving voltages can be given to adjacent sub-pixels to ameliorate color shift, but capacitance-resistance effect distorts high and low voltage signals and affects display quality
Solution Approach 1:
The patent segments the display panel into multiple pixel groups, where each pixel group contains multiple sub-pixels. By controlling all sub-pixels within a pixel group to use the same voltage level (either all high or all low), the patent reduces the frequency of voltage switching on data lines while still achieving color shift compensation through differential voltage application between adjacent pixel groups.
Solution Approach 2:
The patent merges multiple sub-pixels into pixel groups that share common voltage control. By combining the control of multiple sub-pixels into a unified pixel group level, the patent reduces the number of independent voltage switching operations, thereby minimizing capacitance-resistance effects while maintaining the ability to apply different voltages to adjacent groups for color shift correction.
2Adaptability or versatility
If transmission data line frequently switches between high and low voltages, then adjacent sub-pixels can be driven with different voltages to improve viewing angle, but capacitance-resistance effect increases and distorts signals
Solution Approach 1:
The patent divides the display into pixel groups where voltage switching occurs at the group level rather than individual sub-pixel level. This segmentation reduces the total number of voltage transitions on data lines, thereby reducing capacitance-resistance effects while still achieving viewing angle improvement through differential voltage control between adjacent pixel groups.
Solution Approach 2:
The patent changes the control parameter from individual sub-pixel voltage control to pixel group level voltage control. By adjusting the voltage parameter at the pixel group level rather than at the sub-pixel level, the patent maintains viewing angle performance through differential voltage application while reducing the frequency of voltage changes, thus minimizing capacitance-resistance effects.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach effectively mitigates color shift and signal distortion caused by capacitance-resistance effects, enhancing the overall display quality of large-size VA liquid crystal display panels.
Implementation Method 1
Large-size liquid crystal display panels mostly adopt negative VA (Vertical Alignment) liquid crystal technology or IPS (In-Panel Switching) liquid crystal technology
Implementation Method 2
there exists a capacitance-resistance effect between the transmission data line and other electrodes of the pixels
Implementation Method 3
there exists a capacitance-resistance effect between the transmission data line and other electrodes of the pixels
Data Source
AI summary
A display and a driving device and method for display panel thereof are provided. The driving method comprises: determining corresponding first high voltage data according to first initial driving data of a first target pixel, and determining corresponding first low voltage data according to second initial driving data of a second target pixel; determining first target high voltage driving data according to the first high voltage data, and determining first target low voltage driving data according to the first low voltage data; and driving the first target pixel with the first target high voltage driving data, and driving the second target pixel with the first target low voltage driving data.