Display Control Method Stabilizing Common Voltage via Polarity Inversion
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Solution Overview
Problem
Thin film transistor liquid crystal displays (TFT-LCDs) face display failures due to overall or local fluctuations in common voltage values caused by capacitive coupling, which existing methods struggle to effectively address, especially when displaying specific picture frames with varying grayscale values.
Innovation Solution
A display control method and apparatus that detects specific picture frames and adjusts the signal polarity sequence of data lines to reduce capacitive coupling by switching between different output modes based on the presence of a reference picture, ensuring data signals from adjacent data lines have opposite polarities, thereby stabilizing the common voltage value.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If polarity inversion is applied to prevent liquid crystal molecule polarization, then liquid crystal molecule polarization is reduced, but common voltage fluctuations occur due to capacitive coupling
Solution Approach 1:
The patent divides data lines into different groups (first data line groups and second data line groups) with different polarity assignment rules. Even-numbered groups use one polarity pattern while odd-numbered groups use another pattern, creating local variations in polarity distribution to balance capacitive coupling effects across different regions of the display panel.
Solution Approach 2:
The patent introduces asymmetric polarity distribution by treating even-numbered and odd-numbered data line groups differently. The polarity sequences for these groups are designed with deliberate asymmetry to counterbalance capacitive coupling effects, where the polarity pattern for even groups does not simply mirror that of odd groups but is specifically designed to create opposing voltage fluctuations.
2Manufacturing precision
If data lines output data signals with varying polarities to display different grayscale values, then image display quality is improved, but capacitive coupling increases causing common voltage instability
Solution Approach 1:
Different data line groups are assigned different polarity patterns based on their group number (even or odd). This local differentiation allows each region to handle grayscale variations while contributing to overall voltage balance, reducing the cumulative capacitive coupling effect across the entire display panel.
Solution Approach 2:
The polarity sequence is dynamically adjusted based on the data line group number and frame number. The system automatically switches between different polarity assignment patterns depending on which group is being driven, creating a dynamic adaptation that maintains voltage stability while preserving grayscale display quality.
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 reduces display failures by minimizing capacitive coupling and stabilizing common voltage fluctuations, ensuring reliable image display across varying grayscale content.
Implementation Method 1
display failures due to overall or local fluctuations in common voltage values caused by capacitive coupling
Data Source
AI summary
Provided are a display control method and apparatus, a display apparatus, a storage medium, and a computer device. The display control method includes: detecting a picture frame to be output; and controlling a plurality of data lines to output, in a first mode, data signals for displaying the picture frame to be output in in response to detection that the picture frame to be output comprises a reference picture, wherein a signal polarity sequence in the first mode is different from a signal polarity sequence in a second mode, the second mode is an output mode of the plurality of data lines when the picture frame to be output does not comprise a reference picture, the signal polarity sequence is a sequence of polarities of data signals provided by all of the plurality of data lines according to an arrangement order of the plurality of data lines in a display apparatus. The present disclosure solves or improves various display defects caused by local or overall changes in the common voltage value by changing the output mode of data lines.