Display Data Line Segmentation for Moving Line-Stain Reduction
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Solution Overview
Problem
Liquid crystal display apparatuses experience moving line-stain and ripple phenomena due to common voltage issues, which existing driving schemes fail to adequately address.
Innovation Solution
A display apparatus and method utilizing a specific arrangement of gate lines and data lines, with alternating polarities applied to data lines to reduce these phenomena, employing a dot inversion scheme and selective voltage application to mitigate common voltage ripples.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional driving schemes are used, then the display apparatus can operate, but moving line-stain and ripple phenomena occur due to common voltage issues
Solution Approach 1:
The patent segments the data lines into multiple groups (first data line group and second data line group) with different connection patterns to pixel rows. This segmentation allows independent voltage control of different line groups, enabling selective application of data voltages to specific groups while maintaining others at common voltage, thereby reducing common voltage ripple effects that cause moving line-stain phenomena
Solution Approach 2:
The patent applies different voltage conditions to different data line groups locally. The first data line group receives data voltages during specific horizontal periods while the second group maintains common voltage, and vice versa. This local differentiation allows targeted voltage application to reduce ripple phenomena in specific regions without affecting the entire display, improving overall display quality
2Productivity
If data voltages are applied to all data lines simultaneously, then complete pixel updating is achieved, but common voltage ripple phenomena increase
Solution Approach 1:
The patent implements periodic voltage application to different data line groups in alternating horizontal periods. During odd horizontal periods, the first data line group receives data voltages while the second group maintains common voltage. During even horizontal periods, the roles reverse. This periodic alternation ensures continuous pixel updating across all lines while distributing the voltage load, preventing simultaneous voltage application that would cause large common voltage ripples
Solution Approach 2:
The patent applies data voltages to one data line group in advance during a horizontal period before the other group needs updating. This preliminary action allows the first group to be updated while the second group maintains stable common voltage, preparing for the subsequent reversal in the next horizontal period. This staged approach prevents simultaneous voltage transitions that would cause ripple phenomena
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
The solution effectively reduces the moving line-stain and ripple phenomena, enhancing the display's performance by controlling data voltages and optimizing the connection structure between data lines and pixels.
Implementation Method 1
the liquid crystal display apparatus applies an electric field to a liquid crystal layer disposed between two substrates, thereby changing the alignment of the liquid crystal molecules
Implementation Method 2
a liquid crystal layer disposed between two substrates, thereby changing the alignment of the liquid crystal molecules
Data Source
AI summary
A display apparatus includes first-kind data lines and second-kind data lines. Each of the first-kind data lines is connected to one of two pixels arranged in a k-th pixel row and a (k+1)th pixel row. Each of the second-kind data lines is connected to two pixels arranged in different pixel columns in the k-th pixel row and the (k+1)th pixel row. At least two first-kind data lines are consecutively arranged.