Display Panel Crosstalk Reduction via Dynamic Voltage Range Control
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Solution Overview
Problem
Conventional LCDs experience a crosstalk phenomenon due to capacitors between data lines and the common electrode plate, leading to image quality degradation from sudden voltage changes.
Innovation Solution
A display panel controlling method that determines grayscale values for different locations on the panel, adjusts voltage ranges based on grayscale differences, and calculates corresponding voltage values to minimize voltage jumps and reduce crosstalk by using specific voltage ranges and tie point values.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If voltage signals are transmitted in data lines to drive LCD pixels, then the display can show images with different grayscale values, but sudden voltage changes cause crosstalk through capacitors between data lines and common electrode plate, degrading image quality
Solution Approach 1:
The patent applies preliminary action by determining whether adjacent pixels have significant grayscale differences before voltage transmission, and pre-adjusting the voltage range accordingly. When a large grayscale difference is detected, the system proactively limits the voltage change range to prevent crosstalk before it occurs, rather than reacting after the problem manifests.
Solution Approach 2:
The patent implements dynamics by making the voltage range adjustable based on real-time grayscale difference detection. The voltage transmission parameters are not fixed but dynamically adapted: when adjacent pixels have similar grayscale values, a full voltage range is used for efficient display; when large differences exist, the voltage range is constrained to prevent capacitor-induced crosstalk.
2Object-affected harmful factors
If the voltage range is limited to reduce crosstalk, then image quality improves, but the grayscale representation capability may be reduced
Solution Approach 1:
The patent applies local quality by selectively applying voltage range limitations only to specific data line segments where crosstalk risk exists. Instead of uniformly restricting all voltage transmissions, the system identifies adjacent pixels with large grayscale differences and applies constrained voltage ranges only to those specific locations, while maintaining full voltage ranges elsewhere to preserve overall display capability.
Solution Approach 2:
The patent implements parameter changes by dynamically adjusting the voltage range parameters based on detected grayscale differences. The system modifies transmission parameters (voltage min/max values) in response to content characteristics, expanding or contracting the voltage window to balance crosstalk prevention with grayscale fidelity for different display scenarios.
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 method effectively reduces crosstalk in displayed images by determining optimal voltage values for locations with significant grayscale differences, thereby improving image quality.
Implementation Method 1
Capacitors exist between data lines and a common electrode plate in an LCD due to a coupling effect. Because a voltage difference of two ends of the capacitor cannot suddenly change in a short time
Data Source
AI summary
The present application provides a display panel and a controlling method thereof. The method includes: obtaining two grayscale values corresponding to two locations in a same frame, wherein two data voltages of the two locations are transmitted by the same data line; obtaining a grayscale threshold value, and determining a grayscale difference value according to the two grayscale values; when an absolute value of the grayscale difference value is greater than grayscale threshold value, obtaining a first voltage range, and determining the two data voltages corresponding to the two locations according to the first voltage range and the two grayscale values.