Liquid Crystal Display Panel With Alternating Gate Line Scanning
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Solution Overview
Problem
Existing liquid crystal display technologies face challenges in minimizing power consumption while effectively suppressing flickers, particularly in TFT-LCDs, where methods like dot inversion lead to high power consumption and other inversion methods result in longitudinal or horizontal line flickers.
Innovation Solution
A liquid crystal display panel design featuring data lines with inverse polarities and alternately arranged gate lines, where gate drivers drive the lines in opposite directions, implementing a half-column inversion and overlapping signal edges to reduce power consumption and flicker phenomena.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If dot inversion driving method is used to achieve optimal flicker suppression, then flicker suppression effect is improved, but power consumption increases significantly
Solution Approach 1:
The gate lines are divided into two separate groups (first gate lines and second gate lines) that are alternately arranged and driven by independent gate drivers. This segmentation allows different scanning directions and polarity assignments for adjacent columns, achieving flicker suppression without requiring high-frequency inversion of all pixels, thus reducing power consumption compared to dot inversion.
Solution Approach 2:
Different regions of the display (adjacent columns) are assigned different polarity patterns through the two groups of gate drivers. The first gate driver drives in one direction while the second gate driver drives in the opposite direction, creating local polarity variations that suppress flicker only where needed, rather than uniformly inverting all pixels at high frequency.
2Use of energy by moving object
If column inversion driving method is used to reduce power consumption, then power consumption is reduced, but longitudinal line flickers occur
Solution Approach 1:
By dividing gate lines into two alternately arranged groups driven by independent drivers, the patent creates phase differences between adjacent columns. This segmentation prevents the uniform polarity patterns that cause longitudinal line flickers in traditional column inversion, while maintaining lower power consumption through reduced inversion frequency.
Solution Approach 2:
The two groups of gate lines are driven asymmetrically in opposite directions by independent gate drivers. This asymmetric driving creates phase differences of π (180°) between adjacent columns, disrupting the symmetry that causes longitudinal line flickers while maintaining energy efficiency.
3Object-affected harmful factors
If row inversion driving method is used to suppress flickers, then flicker suppression is achieved, but power consumption remains high and horizontal line flickers occur
Solution Approach 1:
The patent segments gate lines into two vertical groups rather than using horizontal row inversion. This segmentation enables column-based polarity differentiation that suppresses flicker more effectively than row inversion while reducing the scanning frequency and associated power consumption.
Solution Approach 2:
Instead of inverting rows horizontally as in traditional row inversion, the patent inverts polarity patterns vertically by assigning opposite scanning directions to the two groups of gate drivers. This inverted approach creates phase differences between columns rather than rows, achieving flicker suppression with lower power consumption.
Data Source
AI summary
A liquid crystal display panel and a liquid crystal display device, where polarities of signals provided by data lines are inversed when half gate lines are scanned to comply with the driving manners of half column inversion, and gate lines on one side which are sequentially scanned line by line from top to bottom are scanned alternately with gate lines on the other side which are sequentially scanned line by line from bottom to top, thus the effect of the dot inversion is realized, thereby reducing the power consumption.