LCD Driving Method with Odd-Even Gate Line Segmentation
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Solution Overview
Problem
As LCD devices increase in size, the number of gate lines and load capacitance increase, reducing the time to charge liquid crystal capacitors and deteriorating display quality due to a reduction in charge ratio.
Innovation Solution
A method of driving a liquid crystal display device where gate signals are applied to odd and even gate lines for different pulse time periods, with data signals supplied to data lines having equal polarities for longer and shorter periods respectively, improving charge properties and display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If LCD devices increase in size, then display area is improved, but charge time is reduced and display quality deteriorates
Solution Approach 1:
The patent divides gate lines into odd-numbered gate lines and even-numbered gate lines, applying different pulse time periods to each group. This segmentation allows the system to address charging issues in larger displays by treating different regions with optimized timing parameters, ensuring sufficient charge time for pixel regions that would otherwise be underserved in larger display areas.
Solution Approach 2:
The patent applies different pulse time periods to odd and even gate lines based on their specific positioning and charging requirements. By customizing the pulse time for different groups of gate lines rather than using a uniform timing scheme, the system optimizes charge properties for specific regions, thereby maintaining display quality across the entire increased display area.
2Measurement precision
If number of gate lines increases, then display resolution is improved, but charge ratio is reduced and display quality deteriorates
Solution Approach 1:
The patent segments gate lines into odd and even groups, allowing differentiated pulse time allocation. This segmentation enables the system to maintain adequate charge ratio for each gate line despite the increased total number of gate lines, thereby preserving display quality while supporting higher resolution.
Solution Approach 2:
The patent changes the pulse time parameter based on gate line number (odd vs. even). By adjusting this critical timing parameter for different gate line groups, the system compensates for the reduced charge ratio caused by increased gate line density, ensuring consistent charge properties across all pixel regions regardless of display resolution.
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 enhances the charge property of LCD images by ensuring sufficient charging of pixel regions, even with reduced charge time, thereby improving display quality.
Implementation Method 1
The LCD device uses the optical anisotropy and polarization properties of liquid crystal molecules to produce an image. Due to the optical anisotropy of the liquid crystal molecules, refraction of light incident onto the liquid crystal molecules depends upon the alignment direction of the liquid crystal molecules.
Implementation Method 2
The alignment direction of the liquid crystal molecules can be controlled by applying an electric field. Accordingly, the alignment of the liquid crystal molecules changes in accordance with the direction of the applied electric field.
Data Source
AI summary
A method of driving a liquid crystal display device having a plurality of gate lines, a plurality of data lines and a plurality of pixel electrodes includes: applying sequentially a gate signal to the plurality of gate lines, the gate signal being applied to odd gates lines of the plurality of gate lines for a first pulse time period and being applied to even gate lines of the plurality of gate lines for a second pulse time period shorter than the first pulse time period; and supplying a data signal to each of the plurality of data lines.