LCD Data Line Segmentation for Moving Line Stain Prevention
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Solution Overview
Problem
Liquid crystal display (LCD) devices face the issue of a moving line stain phenomenon due to the application of data voltages of the same polarity to pixels in a single column, which affects image quality, particularly in white pixel columns.
Innovation Solution
The LCD device configuration includes specific arrangements of gate lines, data lines, and pixels, where data lines are arranged in single and double forms between pixel columns, and polarities of data voltages applied to adjacent data lines are opposite, preventing the moving line stain by ensuring different polarities are applied to adjacent pixel columns, such as white and first-color pixel columns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If data voltages of the same polarity are applied to pixels in a single column, then the circuit design is simplified, but a moving line stain phenomenon occurs affecting image quality
Solution Approach 1:
The data lines are segmented into two types: first data lines connecting pixels in odd rows and second data lines connecting pixels in even rows. This segmentation allows adjacent data lines to have opposite polarities, preventing the moving line stain phenomenon while maintaining circuit simplicity through systematic organization
Solution Approach 2:
Different data lines are assigned different polarities based on their position and function. First data lines and second data lines have opposite polarities, creating local variations in electrical properties that prevent the staining issue in specific pixel columns while maintaining overall system efficiency
2Device complexity
If data lines are arranged in a single arrangement form, then the device structure is simplified, but moving line stain occurs in white pixel columns
Solution Approach 1:
The data line arrangement is segmented into first data lines for odd rows and second data lines for even rows. This creates a systematic dual-arrangement structure that prevents moving line stain in white pixel columns while maintaining overall structural organization and simplicity
Solution Approach 2:
The data line arrangement follows a periodic pattern where first and second data lines alternate in connecting different rows. This periodic structure ensures that adjacent pixel columns receive voltages of opposite polarities, preventing the moving line stain phenomenon while maintaining regular device architecture
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 configuration effectively prevents the moving line stain phenomenon, enhancing image quality by ensuring that data voltages of different polarities are applied to adjacent pixel columns, thereby maintaining clear and stable display performance.
Implementation Method 1
When a voltage is applied to the pixel electrode and the common electrode, liquid crystal molecules of the liquid crystal layer are rearranged to control transmission of light
Data Source
AI summary
A liquid crystal display device may include gate lines, data lines intersecting the gate lines, and pixels electrically connected to the gate lines and the data lines and arranged in pixel columns and pixel rows. The data lines include first-type data lines and second-type data lines. Exactly one pixel column is positioned between every immediately neighboring two of the first-type data lines. No pixel column is positioned between any immediately neighboring two of the second-type data lines. Each of the first-type data lines is electrically connected to a pixel of a first immediately adjacent pixel column in every odd-numbered pixel row and is connected to a pixel of a second immediately adjacent pixel column in every even-numbered pixel row. Each of the second-type data lines is electrically connected to a pixel of exactly one immediately adjacent pixel column in every other pixel row.